Driver's Cab Research Articles

Operator exposure and cabin protection in plant protection product application

AbstractTightly sealed driver's cabs can effectively protect the user from exposure when applying crop protection products. Therefore, under certain conditions, users in such cabins can avoid wearing personal protective equipment for skin and eyes. The protective effect depends on the technical design and handling of the different cabin types and can be divided into categories with different levels of protection. Since the level of protection of the different types of cabins and the associated possibility of not wearing personal protective equipment has not been sufficiently scientifically verified in the past, the present study was carried out to close this gap. Field and laboratory test methods were developed and used to assess exposure levels. External contamination of the cabin was measured using various dosimeters. Exposure inside the cabins was measured on coveralls and gloves to measure dermal exposure and with aerosol sampling pumps to determine inhalation exposure. Tests were conducted on tractors with different cab categories using an air-assisted orchard sprayer as a worst-case scenario for exposure to spray drift. Additionally, an alternative laboratory test method was developed and conducted to evaluate filter efficiency under controlled conditions and compare it with the field tests. The results showed that exposure inside closed cabins was generally low and was not notably correlated with the cabin category. All types of cabins tested were found to provide significant protection from dermal and inhalation exposure.

Research on seat active noise control of driver's cab ground platform based on far-point secondary sound sources

Driver's cab noise has an impact on the long-term driving environment and physical health of drivers. The locomotive driver's cab has significant low-frequency noise due to structure-borne sound, which is suitable for effective suppression by the active noise control system. However, on the one hand, the seat headrest system hinders the driver's movement space, on the one hand, the active noise control for space zones in the driver's cab has limited noise reduction effect due to the large control area. Therefore, a ground research test platform of driver's cab for active noise control was designed, and its structure and control method were introduced in this study. Based on the near-point seat active noise reduction control system, the coherence of the reference acoustic signal of the chair to the acoustic signal at the driver's left ear is very close with the one on the floor, and both of their active noise reduction in the full frequency band from 50 Hz to 5000 Hz are very close (about 4.5 dB (A)). In order to alleviate the interference of the headrest system installed with secondary sound sources on the driver's operating space, a far-point active noise reduction control system was proposed. The results showed that when two reference microphone signals from the seat back and floor position are used at the same time, the active noise reduction next to the driver's left ear in the full frequency band of 50 Hz to 5000 Hz is 4.0 dB(A), which is still significant. This provides a useful reference for the engineering application of active noise control systems in rail driver's cabs.

Numerical study of indoor flow field and ventilation performance of the power room of a diesel locomotive under crosswind

Power room is the core part of the railway internal combustion locomotives, houses many high-power equipment within a limited space. The ventilation performance of a power room are the key factors that ensure the efficient operation of locomotives. Numerical simulations were conducted to study the indoor and outdoor flow fields of the power room, with focus primarily on the indoor flow field of the locomotive. The effects of locomotive and crosswind speeds on the ventilation performance and indoor flow field of a power room were studied. Furthermore, the effects of fan performance on the power room ventilation were compared and analyzed. The numerical methods used were verified using experimental data. Results showed that as locomotive speed increased, the power room ventilation performance decreased, while the airflow rate of certain power room air intakes increased, with an increase in locomotive speed. Crosswinds significantly increased the power room ventilation quantity, especially when the intakes faced the crosswind. When the crosswind speed surpassed a certain threshold, the intakes on the leeward side of the power room entered an air-leakage state. The indoor flow field distribution of the power room was unaffected by the fan performance. Though the effect of fan performance on the amount of airflow entering the power room varied, the fan performance positively correlated with the overall ventilation performance of the power room. Considering the strong airflow separation caused by the back-step corner of the driver cab, attention should be paid to the placement and intake position of the power room in the design stage.

Test and evaluation of driving comfort of rice combine harvester.

During the field operation of rice combine harvester, the vibration generated by vibration component will only reduce mechanical reliability and yield, but also cause resonance in the human body, leading to a decrease in driving comfort and even damage to the driver's health. To study the impact of combine harvester vibration on driving comfort, a certain type of tracked rice combine harvester was selected as the research object, and vibration tests were carried out based on vibration source analysis in the driving cab during field harvesting operations. The study showed that under the influence of field road conditions and crop flow, the operating speed of the engine, threshing rotor, stirrer, cutting blade, threshing cylinder, vibration sieve and conveyor were fluctuating, and their rotation and reciprocating motion would produce vibration excitation in the driving cab. A spectrum analysis was conducted on the acceleration signal of the driver's cab, and it was found that vibration frequencies at three measuring points, namely the pedal, control lever, and seat, can reach up to 36.7~43.3 Hz. These frequencies can cause resonance in various parts of the driver's body, such as the head and lower limbs, leading to symptoms such as dizziness, throat discomfort, leg pain, defecation anxiety, and frequent urination, and even affect vision of the driver. At the same time, a weighted root-mean-square acceleration evaluation method was used to evaluate the driving comfort of the harvester. The evaluation method showed that the vibration at the foot pedal (Aw1 = 4.4 m/s2>2.5 m/s2) caused extreme discomfort, while the vibration at the seat (0.5 m/s2< Aw2 = 0.67 m/s2<1.0 m/s2) and the control lever (0.5 m/s2< Aw3 = 0.55 m/s2<1.0 m/s2) caused relatively less discomfort. This research can provide some reference for the optimization design of the joint harvester driver's cab.

Coach crashworthiness and failure analysis during a frontal impact

Accidents involving coaches may endanger the physical integrity of their occupants, since the driver stands very close to the collision region. In the event of a frontal impact, there is a violation of the driver's residual operational space, which depends on the energy of the crash, and this may jeopardize the driver's safety. The most decisive factors in achieving a successful design of structural vehicles is to design innovative solutions that safely control the high energy released as a consequence of the high accelerations involved during impacts. Long-course coaches currently lack design techniques and technologies to absorb in a controlled way the kinetic energy released in the collision. Thus, to fulfill this gap in the passive safety of these vehicles, it is necessary to conduct structural optimization research, to improve the passive safety in the eventual event of a frontal collision. The main goal of this research is to develop new solutions for passive safety used in coaches. To this end, a feasibility study involving experimental and numerical techniques was conducted to assess the improvement of driver safety in case of a frontal impact. This study addresses the need for improved experimental validation and fills a literature gap by developing a realistic testing system and incorporating advanced monitoring techniques for evaluating frontal collisions in vehicles, so a M3 Class III coach was used to conduct this study. Experimentally, the vehicle was subjected to a frontal crash test, whereby the ECE Regulation R29 was considered as the baseline, despite focusing on the certification of heavy vehicles with separate driver's cab. Since no standards are available focusing on coaches, the ECE R29 was used and adapted to the studied model. The experimental testing setup comprises a 2500kg pendulum supported by two steel bars was used. When released it collides with the structure, anchored to the ground, with an energy of 55kJ. Monitoring techniques were employed to track the structure, namely Digital Image Correlation (DIC), strain gauges, and accelerometers. These were placed at specific points to accurately assess the damage evolution of the structure. The experimental results were used to validate the numerical results, obtained using VPS/PamCrash® by FEM techniques. The frontal crash simulation was performed using the Finite Element Method, with an explicit dynamic analysis. Strain evolution, accelerations, and displacements were obtained and compared with the experimental results. Furthermore, the evolution of the kinetic energy is plotted and compared with the reference value of the standard. Through the different obtained outcomes, a determination could be made whether the current models meet the safety criteria or whether a proposed solution is required to enhance its performance. According to the standard guidelines, the present structure has no potential to meet the essential safety requirements. In the future, new alternatives should be explored, leading to a structure that can efficiently absorb all the energy released in the experiment under controlled conditions.

Passive Safety Solutions on Coach according ECE R29: Experimental and Numerical analyses

Accidents involving vehicles for public transportation can endanger both the driver and the passengers, due to the proximity of the impacting region, and the correspondent violation of the safety cell. The vehicle structural design and the high rate of energy or accelerations involved are important aspects during an accident. To improve the current design applied to public vehicles, structural optimization research, with the goal of improving safety, is needed.The objective of this study is the development of new technologies for new passive safety solutions, employed on coaches. Initially, a study on the improvement of the driver safety, during a frontal collision, will be developed. The final outcome of the present study is the development of new generation of coaches outfitted with technology capable of reducing the impact's unforeseen consequences.To study the structural behavior of a coach (M3 Class III vehicle) in the event of a head-on collision, the ECE R29 Regulation will be considered. The current safety standards only focus on the certification of large vehicles with separate driver's cabs, with no requirements addressing coaches. An experimental setup was built to conduct a frontal crash test. An impactor hanging by two steel bars impacted against the structure crushing it, with an energy of 55 kJ. A Digital Image Correlation (DIC) system, strain gauges, and accelerometers fitted on the structure were used for data acquisition. The experimental setup was also numerically simulated, using the Finite Element Method (FEM). A dynamic explicit model was considered to determine the dynamic structural response. The evolution of the strain, accelerations and displacements were obtained and compared with the experimental results. The internal energy was evaluated and compared to the reference value. With the different obtained results, it was possible to decide whether the current models satisfy the safety criteria of or whether a solution proposal is necessary to improve the outcomes.

ГИГИЕНИЧЕСКАЯ ОЦЕНКА УСЛОВИЙ ТРУДА ВОДИТЕЛЕЙ ПАССАЖИРСКОГО АВТОТРАНСПОРТА ПРИ РАБОТЕ В УСЛОВИЯХ БОЛЬШОГО ГОРОДА

Objective: To study the characteristics of the working environment of passenger transport drivers (PTDs) in a metropolis. Methods: The study was conducted at the state unitary enterprises 'Avtobus-1', 'Avtobus-2', 'Avtobus-3', and 'Trolleybus-1' of the city of Dushanbe. 223 drivers of AKIA, ISUZU, LiAZ buses and TIU trolleybuses were involved. Studies of noise and vibration levels at workplaces and dust and gas pollution in driver's cabs were carried out. Results: Noise and vibration levels in the AKIA and ISUZU buses were within the normal range. In LiAZ buses, noise and vibration levels exceeded the maximum permissible levels (MPL) by 9 dB and 12.7 dB, respectively. In trolleybuses, these levels were exceeded by 20 dB and 17.3 dB. The dust concentration inside vehicle cabins of all vehicles was 3.9 to 5.75 times higher than the maximum allowable concentration (MAC). The highest dust concentration was noted in the air at the workplaces of LiAZ buses and TIU trolleybuses drivers – 10.4 mg/m3 and 11.5 mg/m3, respectively. The amount of nitric oxide in the breathing zone of AKIA bus drivers was 10.3 mg/m3, and in the cabs of ISUZU buses, it was 10.6 mg/m3. The highest concentrations of nitric oxide were observed in the cabs of LiAZ buses, which exceeded the MAC by 2.7 times. All vehicles' carbon monoxide concentration was 1.4 to 2.3 times the MAC. Conclusion: Noise and vibration levels are increased in older vehicles, while they correspond to the norms in new generation buses. A significant MAC excess of dust and harmful gases in the buses and trolleybuses cabs, especially during the hot season, is mainly due to the attitude of PTDs in Dushanbe, who fail to comply with the driver's cabin sealing recommendations. Keywords: Passenger vehicles, noise, vibration, gas contamination and dustiness of the air.

Vehicle kinematic and dynamic modeling for three-axles heavy duty vehicle

&lt;abstract&gt;&lt;p&gt;Under complex conditions, the vertical, lateral and longitudinal dynamics of vehicles have obvious coupling and interaction. This paper aims to provide a suitable driver cab and a vehicle model for the study of vehicle coupling dynamic performance. In modeling the cab and body kinetic equation, two shock absorbers are considered in the front axle suspension system. In addition, the vertical, roll and pitch motion of the diver cab, vehicle body, the vertical and roll behavior of three wheel axles, the pitch angles of the left and right balancing pole on rear suspension, and roll angle the of each tire are considered. Finally, based on the above coupled motion characteristics, a diver cab and a vehicle model for three-axles heavy-duty vehicle with 26 degrees of freedom (DOF) are proposed.&lt;/p&gt;&lt;/abstract&gt;

Display dimming model characterized by three-dimensional ergonomic study

Self-luminous display devices are essential in various working environments, such as aircraft cockpits and the driver cab of vehicles and trains, where the external light environment varies drastically. Owing to the significant illumination changes, auto-adjusted display luminance based on ambient lighting is necessary for drivers to work efficiently and comfortably. This study proposes a display dimming model based on three dimensions of ergonomic testing, consisting of visual performance (VP), visual comfort (VC), and visual fatigue (VF). Five ambient illuminances, each combined with five display luminance levels, form a total of 25 conditions demonstrated in this experiment. Using a within-subject design, ten observers experienced all the combination conditions. The experiment employs the Anfimov table to test the VP, VC scale to evaluate VC, and VF scale to assess VF. Based on the experimental results, sub-models are constructed to clarify the characteristics of each dimension (VP, VC, and VF). Subsequently, the analytic hierarchy process is employed to construct an evaluation system by calculating the weight of each dimension in the total score. Finally, exponential fitting is utilized to build a wide-range display dimming model, which explicitly describes the inherent connection of complex light environment matching.

Development of virtual benches for testing the digital twin of a vehicle

The article analyzes the approaches to the creation of the concept of a virtual test bench for testing the digital twin of the automotive industry product. Such components of the digital platform as suspension area, power plant, braking and cooling systems are being investigated. The problem of the implementation in the digital twin of such important units as the attachment points of units and assemblies on the vehicle body frame, even surface, driver dummy, the scheme of attachment of body elements, etc is studied. The importance of the implementation of such benches as platforms for assessing the indicators of the vehicle passive safety or as stand for assessing the water tightness of the vehicle body is considered. A number of results that illustrate development areas and success of the authors of the article in these areas are presented. It is shown that the digital platform can be used for certification and rating tests, assessing the comfort and visibility of the driver's cab.

СОВЕРШЕНСТВОВАНИЕ ТЕХНИЧЕСКОГО СЕРВИСА С ПРИМЕНЕНИЕМ ВИЗУАЛИЗАЦИИ

Recently, many agricultural organizations have been renewing their fleet of agricultural machinery to increase productivity, replacing old equipment with new ones. The operation of new equipment requires an appropriate level of training of tractor drivers and engineers. Information support and appropriate simulators make it possible to solve this problem for the agro-industrial and economic complexes of the country. Information support consists in the timely issuance of reliable information at different stages during the maintenance of agricultural machinery. This direction is relevant, little studied and requires comprehensive theoretical and practical study. The following persons are involved in the process of visual inspection: the PPO manager, the machine operator responsible for the machine or the chief engineer. The process of visual inspection begins in the driver's cab, regardless of the type of self-propelled equipment. During the visual inspection of the equipment, the movement of the PPO manager is carried out counterclockwise, accompanied by the person responsible for the machine. During the visual inspection process, the PPO manager inspects a limited list of part names. Visual inspection involves assessing the condition of parts without the use of profile tools and disassembly of machine systems. Due to the fact that maintenance is performed in this way, time is saved, and the quality of operations will be at a sufficiently high level. To organize maintenance in augmented reality glasses for each item of equipment, if necessary, a separate application is created for the convenience of the machine operator in working with the interface. The developed system helps the machine operator, engineering engineer, as well as the service department, using an interactive application, to quickly find information about the correct connection of electrical equipment, the necessary tire pressure for certain types of work, follow the established sequence and tightening torque of nuts, wheel fastenings and other operations.

DEVELOPMENT OF THEORETICAL FUNDAMENTALS OF OPTIMIZATION AND QUALITY ASSESSMENT OF TRACTION ROLLING STOCK MANAGEMENT

Among the main causes of human operator errors are the following: unsatisfactory training or low level of qualification; non-compliance with the prescribed operating procedures; unsatisfactory working conditions associated with such negative phenomena as excessive noise, vibration, temperature fluctuations in the driver's cab (especially on locomotives); lack of attractive incentives to achieve the optimal level of quality of work. The choice of the criterion of optimal control can be ambiguous. The source of complexity is the inconsistency of goals. If you want to optimize one of the parameters in compliance with the restrictive requirements for other parameters, then a partial criterion is formed. In the presence of several optimality criteria, the additive criterion is chosen when the absolute values of the criteria are significant for the selected parameter vector. If a significant role is played by changes in absolute values of partial criteria in the variation of the vector of variables, then apply the multiplicative criterion of optimality. If the task is to achieve equality of normalized values of conflicting partial criteria, then the optimal design is performed by the minimum criterion.

Influence of production and behavioral risk factors on health disorders in employees of locomotive crews

Preserving the working longevity of locomotive crew employees is one of the priority tasks of Russian Railways. The urgency of the problem is related to both the medical aspects of railway traffic safety and the importance of preserving human capital. The aim of study is to research the influence of occupational and behavioral risk factors on health disorders in drivers and their assistants. The study included the results of a survey of 9308 employees of locomotive crews on the presence of production and behavioral risk factors for health disorders, as well as on the presence of cases of temporary disability, hospitalization or unscheduled medical care in the previous year. Additionally, the results of clinical and laboratory studies were studied. Noise exposure is the main production factor affecting the unscheduled attendance of locomotive crew employees to the doctor, the number of cases of temporary disability and hospitalization. Only 13% of respondents have a high level of commitment to a healthy lifestyle. Among employees who are not exposed to industrial noise, the number of people who have a high commitment to a healthy lifestyle is 2 times higher than among those who complain about the presence of an acoustic factor. The main differences in adherence to a healthy lifestyle between people who have and do not have complaints about the negative impact of the sound factor are related to alcohol abuse (1.4 times more often used by people working in conditions of noise exposure), frequent use of semi-finished products and fatty foods (1.2 times more often). Among people exposed to industrial noise, a body mass index (BMI) exceeding 25 kg/m2 is 1.5 times more common than in people who do not have noise exposure. The frequency of occurrence of blood pressure is more than 130/80 mm Hg. and blood cholesterol more than 5 mmol/l, respectively, is 1.9 and 2.2 times higher in individuals with intra-cab acoustic load, compared with those without. An increase in the number of cases of temporary disability, hospitalization, and unscheduled visits to a doctor in people who report exposure to noise in the driver's cab may be associated with both occupational and behavioral factors: alcohol consumption, poor nutrition, and a high proportion of people with a BMI exceeding 25 kg/m2.

РЕЗУЛЬТАТЫ ДВУХФАКТОРНОЙ ОПТИМИЗАЦИИ ПАРАМЕТРОВ ПЕРСПЕКИВНОЙ МОДУЛЬНОЙ КОНСТРУКЦИИ ГИДРОПНЕВМАТИЧЕСКОЙ ПОДВЕСКИ ЛЕСОВОЗНОГО АВТОМОБИЛЬНОГО ТРАНСПОРТА

The necessity to reduce the cost of timber haulage by logging road transport to increase the efficiency of logging in the Russian Federation has been substantiated. The drawbacks of the timber road transport equipped with traditional suspension systems, which are manifested when they transport timber along low quality logging roads, have been revealed. A promising direction for improving the operational properties of timber road transport used for hauling timber is described. It consists in the development of effective design schemes for suspensions for timber road transport with optimal suspension parameters. The scientific works of foreign scientists in this direction has been considered. Taking into account the identified shortcomings, a promising scheme of modular hydropneumatic suspension for timber road transport has been developed, which makes it possible to recuperate the energy of the working fluid when moving on the roads of low quality, compensate for leaks of working fluid, and also control the ground clearance from the driver's cab remotely. Two-factor optimization has been carried out, which allows identifying favorable combinations of the two factors under study. The graphs of the influence of the pneumatic cylinder diameter heat transfer coefficient on the maximum vertical acceleration of the sprung mass, as well as on the maximum gas pressure in the pneumatic cylinder and the amplitude of the temperature change have been obtained. The cartograms of optimization of the design parameters for perspective hydropneumatic suspension have been presented.

Evaluate the shielding effectiveness of driver’s cab for metro and its influence on electromagnetic exposure safety

In order to study the shielding effectiveness of metro driver cab and its impact on the safety of driver high frequency electromagnetic exposure, this paper construct the high frequency electromagnetic environment model of metro cab under the radiation of external and internal exposure sources, its shielding effect is simulated correspond, and the safety of high frequency electromagnetic exposure of metro driver is analysed. The simulation results show that the under digital trunked system antenna (external exposure source) radiation, the peak value of electric field strength inside the metro cab without aluminium alloy body is 1.7214 V/m, which 322 times higher than that of aluminium alloy cab; under the communication based train control system antenna (internal exposure source) radiation, the peak value of electric field strength inside the aluminium alloy material metro cab is 3.1625×10−1 V/m, which 26 times higher than that of without aluminium alloy body. The compared results reveal that the shielding effect of metro cab on the external exposure source is significantly greater than the internal exposure source. Although the radiation dose absorbed by the metro driver varies by 4 to 125 times in different situation, still lower than the international occupational electromagnetic exposure limit, which indicate that the shielding effect of metro cab in the above situation will not cause health hazards to the driver.

Malticriteria design of a large-scale mechanical systems

The design and optimization of a large-scale systems are the most difficalt problems. A large-scale system consists of a number of subsystems. For example, in a harvest for harvesting one can separate the following subsystems: the frame, driver's cab, platform, engine, transmission, and steering system. Different departments of the design office engaged in creating a machine optimize their ‘own’ subsystems, while ignoring others. A machine assembled from ‘autonomously optimal’ subsystems turns out to be far from perfect. A machine is a single whole. When improving one of its subsystems, we can unwittingly worsen others. This implies that it is not always possible to solve optimization problems directly even for determination of the feasible solution set. The correct determination of the feasible solution set was a major challenge in engineering optimization problems. In order to construct the feasible solution set, a method called the Parameter Space Investigation (PSI) has been created and successfully integrated into various fields of industry, science, and technology. The methods of approximation of the feasible solution and Pareto optimal sets and the regularization of the Pareto optimal set are described in our paper. These methods are applied to solving the multicriteria optimization problems of large- scale systems. For example, they were applied in an agricultural engineering to a harvester for harvesting design.

Design of large-scale streamlined head cars of high-speed trains and aerodynamic drag calculation

Aerodynamic drag plays an important role in high-speed trains, and how to reduce the aerodynamic drag is one of the most important research subjects related to modern railway systems. This paper investigates a design method for large-scale streamlined head cars of high-speed trains by adopting NURBS theory according to the outer surface characteristics of trains. This method first created the main control lines of the driver cab by inputting control point coordinates; then, auxiliary control lines were added to the main ones. Finally, the reticular region formed by the main control lines and auxiliary ones were filled. The head car was assembled with the driver cab and sightseeing car in a virtual environment. The numerical simulation of train flow field was completed through definition of geometric models, boundary conditions, and space discretization. The calculation results show that the aerodynamic drag of the high-speed train with large-scale streamlined head car decreases by approximately 49.3% within the 50-300 km/h speed range compared with that of the quasi-streamlined high-speed train. This study reveals that the high-speed train with large-scale streamlined head car could achieve the purpose of reducing running aerodynamic drag and saving energy, and aims to provide technical support for the subsequent process design and production control of high-speed train head cars.

Definition of appropriate indicator and threshold values for intelligibility: Application for rolling stock’s public address systems

The rolling stock’s public address systems are used to broadcast safety information from the driver cab or the train supervisor. EU legislation request an audible information using the STI-PA intelligibility indicator be at least 0.45 in the whole train. The purpose of the study is to assess the current intelligibility indicator according to the operating conditions of the rolling stock in comparison with other indicators in the literature, then to study the correlation between indicators and the passenger perception and to define threshold values and objective scales of comfort. The first step was to define a methodology to characterize the rolling stock’s public address systems. Secondly, two kinds of measurements were performed in a high speed train at several positions: the end-to-end public addresses system regarding its linear and non-linear characteristics in order to simulate distortion occurrence in the transmission channel at various operating condition. As a result of this study, standard intelligibility indicators showed poor correlations with intelligibility scores from the listening test, especially when the degradation is due to distortion. Fields of improvement are investigated using intelligibility indicators based on clean and degraded speech signal comparison.

Crushing analysis and multi-objective optimization of a railway vehicle driver's cab

This paper presented the structure of a crashworthy railway vehicle driver's cab and its crashworthy performance was investigated by experiment and simulation. Based on the structural characteristics of railway vehicle, the driver's cab was divided into three parts: the first part consisted of four thin-walled square tubes with diaphragms, the second part consisted of a front baffle, a first level support structure, a first level draft sill and a first level longitudinal beam, the third part consisted of a second level support structure, a second level draft sill and a second level longitudinal beam. The quasi-static compression experiment showed that the driver's cab produced stable and ordered plastic deformation. Finite element simulation by LS-DYNA was used to simulate the deformation of the structure under quasi-static compression. Simulation results showed good agreement between experiment and simulation, the driver's cab absorbed 2321.13kJ energy in the quasi-static crushing load, the percent of the first part, the second part and the third part are 17.86%, 81.28%, 0.86%, respectively. Then based on the validated finite element model, a multi-objective optimization was applied to improve the crashworthiness of the driver's cab. It was found that the energy absorption (EA) increased with the increasing of crushing peak force (CPF), and the minimum EA and CPF in the design range were 4.311×103kJ, 7.609×103kN, respectively, the maximum EA and CPF in the design range were 6.380×103kJ, 15.720×103kN, respectively.

Research on Secondary Impact Safety of Train Driver based on THUMS Dummy

Based on biomechanical Total Human Model for Safety (THUMS) dummy and traditional rigid dummy, the train driver injury of secondary impact in railway crash events is analyzed and the results are compared. The results of THUMS dummy are more detail and comprehensive to describe the injury of train driver. It could be applied to the safety research of crashworthiness of train driver cab in future. The driver injury is serious and needed to be optimized the parameter of cab console to reduce injury risk for the driver in the next work.