Three-dimensional Entity Model Research Articles

Design and Analysis of a Single-sided Hook-type Structural Lock with Eccentric Wheel

In order to reduce the lander load during the docking process during the docking of the manned lunar lander and the cruise, this paper designs and introduces a kind of unilateral hook type structural lock with eccentric wheel. This mechanism can reduce the quality of the lander docking device and achieve the technical requirements of locking and unlocking between the two spacecraft. Based on the mathematical model and three-dimensional entity model of the structural lock device, the motion law is solved and simulated by Matlab and Adams software respectively. Then the theoretical and simulated motion data are compared to verify that the modified structure lock can complete the established design requirements.

Dynamic and static analysis of the battery box structure of an electric vehicle

As an important device to protect batteries in electric vehicles, the dynamic and static performance of the battery box is closely related to the safety of the whole vehicle. Therefore, it is very important to study the stress and displacement distribution of the battery box under specific working conditions to optimize the design of the weak parts of the battery box’s stiffness and strength. At first, this paper establishes the three-dimensional entity model and finite element model, and the stress state of battery box under extreme conditions of steep turning and braking on uneven road surface is calculated. At the last, the static strength analysis is carried out on the battery box. By analyzing the modal characteristics and the harmonious response to vibration characteristics of the battery box, the dynamic performance of the battery box has been comprehensively mastered. Finally, based on the static and dynamic analysis results of the battery box, the weak points and unreasonable points are improved. The results show that the modified model has a good improvement effect and has basically reached the established design requirements, which verifies the rationality of the structural improvement scheme.

Design and performance analysis of a retractable electric vehicle based on modern numerical simulation theory

In view of environmental pollution, energy shortage and urban traffic congestion and other issues, a drawer type retractable electric vehicle (REV) is designed. Through the establishment of the frame and the vehicle’s three-dimensional entity model, the frame of the static characteristics and modal characteristics are analyzed by using the finite element numerical simulation theory. The results show that the frame vertical stiffness is not reasonable, thereby improving the frame structure. Based on multi-body dynamics theory, the vehicle dynamics model is established, and the ride comfort of the vehicle is checked. The results show that the comfort of the vehicle is in line with the general requirements of the vehicle. The design and analysis method of this paper has enriched the design method of modern electric vehicle, which can embody the characteristics of light weight, clean energy, effective space utilization and so on, as well as has certain engineering application value.

Research and design of wind power grid switch for low voltage crossing ability

This paper proposes a new type of wind power grid switch design, according to the requirements of the wind power generation system for grid switch technology, combined with the electromagnetism theory and empirical formula. The new interconnection switching used the characteristics of the high remanence of two-phase magnetic materials to solve the problem such as great power consumption, holding not across low voltage, in view of the traditional electromagnetic grid switch, and then set up new interconnection switching of the three-dimensional entity model, finally used the finite element simulation software, the change of the curve, such as the electromagnetic suction parameters and contact motion speed was obtained, the relationship between the structure parameters and interconnection switch operating characteristics of the contact was also obtained. Finally simulation experiment results show that the new grid switch in the case of no excitation current keeps off state, which can be well applied to wind power generation system, and can effectively improve the stability of large-scale distributed power grid operation, and has a certain theoretical significance and practical value.

Numerical and experimental study on seismic behavior of concrete-filled T-section steel tubular columns and steel beam planar frames

The seismic behavior of planar frames with concrete-filled T-section columns to steel beam was experimentally and numerically studied. A finite element analysis (FEA) model was developed to investigate the engineering properties of the planar frames. Two 1:2.5 reduced-scale specimens of T-section concrete-filled steel tubular column and steel beam of single-story and single-bay plane frames were designed and fabricated based on the design principles of strong-column, weak-beam and stronger-joint. One three-dimensional entity model of the investigated frame structure was built using a large-scale nonlinear finite-element analysis software ABAQUS. Experimental results show that the axial compression ratio has no effect on the failure mode of the structure, while with the increase of axial compression ratio and the dissipated energy ability increasing, the structural ductility decreased. The results from both experiments and simulations agree with each other, which verifies the validity and accuracy of the developed finite element model. Furthermore, the developed finite element model helps to reflect the detailed stress status of the investigated frame at different time and different positions.

Reconstruction of 3d Model Based on CT Scan Image Information of Human Ridge Cone Bone

Aiming at the manufacturing process of individualized human body skeleton model in medical rehabilitation engineering, the three dimensional geometry model of human body skeleton model has been reconstructed for based on the image of the bone obtained from the computed tomography (ct) scan using the CAD software. In the Modeling process, the CT scan of the two-dimensional CT images of bone cross section in the online data extract, after interpolation and fitting method to generate a set of closed cross section lines, such as recycled curve skin generate ideal bone surface, and eventually generate human bones of three-dimensional entity model.

Research on Dynamic Characteristic on the Circular Saw Blade of the Plastic Doors and Windows Corner Cleaning Based on ANSYS

In the plastic profiles corner cleaning process, the axial vibration of the end mill caused the corner cleaning quality is poor. So, it used the SolidWorks to establish the three-dimensional entity model of the circular saw blades in this article, and then the natural frequencies and the corresponding vibration types of the circular saw blades have been obtained from model analysis of the circular saw blade of the plastic doors and windows corner cleaning machines by using ANSYS, and the analysis of transverse vibration stability of the low frequency range. It was concluded that the allowable speed range of the circular saw blade was 1000rpm-6459rpm and a larger diameter chuck was utilized to enhance the vibration stability of the circular saw blade. The research aims to provide reference data for rationalization of the circular saw blade parameters selection and enterprise actual plastic doors and windows corner cleaning. It has an important theoretical value to improve the quality of the plastic doors and windows corner cleaning.

Study on Dynamic IR Image Generation of Space Target

Dynamic IR image generation of space target is one of the key technologies in hardware in the loop simulation for the infrared imaging guidance system. The three-dimensional entity model is created in the Creator, Sinda/Fluint is used to analyze each part of dynamic infrared radiation characteristics from on-orbit Space Target, on the basis of the LRS infrared star catalogues, celestial background modeling is built. In Vega, the dynamic IR image of space target is generated. The simulation results show that the dynamic IR image of Space Target provide the important objective basis for the hardware in the loop simulation for the infrared imaging guidance system.

Design and Analysis of a Tow Truck’s Lifting Organ

According to the super large or heavy vehicle accidents existing wrecker cannot complete the wrecker rescue mission independent problems, puts forward the design of a practical game type crane wrecker. The hoisting mechanism as the research object, the traditional mechanical method is designed and calculated, then the three-dimensional entity model using 3D mechanical design software Solidworks, and imported into the finite element analysis software ANSYS to analyze the static mechanics characteristics of the structure, to improve the local strength of short position. On this basis, a lifting test vehicle prototype, rated load operation and overload operation condition test, and measure its subsidence. With the analysis of the experiment results, show that the design truck lifting organ can meet the demand of the technology.

Dynamic Sensitivity Research for the Spindle of High-Speed Grinder Based on the Artificial Neural Network

Three-dimensional parametric entity model was established for the high speed grinder spindle using Pro/Pragram in this article, the sample data of the artificial neural network model was obtained with the modal analysis performed by MSC.Patran/Nastran finite element analysis software, and the dynamic analysis model of high-speed grinder was established based on BP artificial neural network, the the modal analysis experiment of high speed grinder spindle and the sensitivity analysis of first-order natural frequency for design parameters were finished. Research shows that the dynamic characteristic of hollow spindle structure is much better than solid structure, compared with finite element model, BP artificial neural network model can realize optimization design and calculation of complex structure more quickly.

Numerical Analysis of Creep and Longitudinal Cracks Effection on PC Bridge Deflection

This paper presents a three-dimensional entity model to analyze the creep effection of PC continuous rigid frame bridge and simulate the impact of longitudinal cracks at the bottom of mian span on the deflection briefly with ANSYS software. The result shows that creep amplifies the deflection of bridge and makes the position of maximum deflection move to the center of mian span. And the longitudinal cracks of mian span don’t make great contribution to the deflection of PC continuous rigid frame bridge directly. Actually, the cracks change the stress state of the bridge’s section, which results in the risk of web cracking and further the stiffness degradation of structure. The stiffness degradation increases the defection of bridge to a great degree finally.

Research on the Processing Simulation of Whorl Milling Based on LISP

According to the development requirements of CAD/CAM numerical control processing simulation software, now take the simulation of milling whorl processing as an example. Based on AutoCAD application platform, and the theory of whorl milling processing, LISP is used for programming, and the simplified ball three-dimensional entity model of the disc cutter is shown. Through object boolean operation, the milling simulation program is called, finally realizing the dynamic 3D simulation of whorl milling processing, providing technical support for the real-time observation of numerical control milling.

Comparative Analysis of Static Strength of Traditional and Bionic Semi-Trailer Frame

A three-dimensional entity model of storage grid semi-trailer frame was designed using the Pro/E software. The model was transferred into the ANSYS for static strength analysis. On this basis, bionic structure was introduced into design of semi-trailer frame. The static strength of bionic and traditional structure was contrasted under the same conditions of weight.

Dynamics Influences Discussion of Robot MiniQuad-II for Construction Member Structure Change Based on ADAMS

MiniQuad- II is a modular four-legged walking robot. In order to research dynamics and kinematics of the robot, based on inner relation of different simulation software, three-dimensional entity model of four-legged walking robot MiniQuad-II is built up with SOLIDWORKS software firstly. Then, the model is leaded in ADAMS software, dynamics and kinematics of the robot are simulated, the relevant process is described in this paper. As an example, the robot MiniQuad-II walking along straight line is investigated, the dynamics of the robot are analysed with ADAMS. Further, the influences on dynamics properties for the robot are discussed when structural parameters of the robot are changed. Results can be used to optimaze robot structure and determine its final characteristic parameter.

Designing and Realizing of UAV Simulation System

This paper discusses an Unmanned Aerial Vehicle simulation system design and implementation, which focuses on the system design, system management, software development, and the information flow management of the whole system. To simulate battlefield environments, this system provides a clear and visual expression way for complex system design. Besides, it provides services for the design, integration testing, experiment, verification and evaluation of complex system. The main tasks of the system include: establish flight control simulation model; construct three-dimensional visual environment model and three-dimensional entity model; In the case of aircraft loading, drive various kinds of simulation modules, use related model of aircraft task / path planning module; display the typical use of aircraft system visually, as combining with three-dimensional visual simulation environment. Based on VC++ and MultiGen Creator/Vega, this simulation system probes into three-dimensional modeling technology and visual simulation-driven. It proposes general techniques route, improves work efficiency and has a wide range of application.

Study on Roller Profile for Cam Forming by Cross Wedge Rolling

Based on the motion relation between rollers and work piece during cross wedge rolling (CWR) process, roller profile equations for cam forming were studied. A three-dimensional entity model of the roller was established using the profile equations. Process of cam forming by CWR was simulated by DEFORM-3D. The FEM data was used to analyze dimensional accuracy of the formed cam. Results demonstrate that the equations can be used in roller design for cam rolling.

The Finite-Element Analysis of the Main Frame of the Airborne Photoelectric Platform

Because both of the volume and the weight of the photoelectric platform are small, the structure of two frames and two axes is used in the photoelectric platform. As the key component of the photoelectric platform, the main frame should have sufficient strength and rigidity. In order to achieve this object, three-dimensional entity model of the main frame is established using CATIA software. Then the finite-element analysis of the model is finished with ANSYS Workbench. Based on the analysis results, the weak links of the main frame is found. Then these links are improved and the main frame is analyzed again. After improving the structure, the results of the finite-element analysis show that the main frame meets the requirements of design and has perfect overall performance.

Reverse 3 D Garment Model Reconstruction Technology Research

Reverse Engineering technology has became a widely applied technology, but it has never been used in the field of Clothing Design Engineering .This paper aims to explore how to constructing the three-dimensional entity model of clothing by Geomagic software, then introduce the files into Freeform software in order to redesign clothing. The matters need attention during the Point cloud select, t data processing and model reconstruction are described in detail. In addition, the paper discusses the best solution of importing into Freeform software in different situation, also discusses the processing procedure after importing.

Parameterization Structural Design and Three-Dimensional Entity Modeling of Brake by Wire System Based on Pro-E

Parameterization design was applied to actuator structural design and three-dimensional entity modeling of brake by wire system. Based on pro-engineering software environment, motor driving entity model of brake by wire system was established. Motion transformation device, force booster device, cylindrical gear decelerate device were included. According to relative motor parameters and structural function of the equation, structural design of motion transformation device, force booster device and cylindrical gear decelerate device were carried on. Under Pro-E entity modeling platform, three-dimensional entity model of brake by wire system was established.

Dynamical Simulation Model of Auger Miner's Working Mechanism Based on Virtual Prototyping Technology

In order to do research on dynamic characteristics of auger miner’s working mechanism, three-dimensional entity model was built by software Pro/E, some components of working mechanism were made flexible and corresponding Modal Neutral Files were created by software ANSYS. Through the date exchange among Pro/E, ANSYS and ADAMS, dynamical simulation model of working mechanism was built in ADAMS environment. ADAMS/vibration, a plugin in ADAMS, can solve the dynamical simulation model and obtain dynamic characteristics of working mechanism. The establishment of the model can lay the foundation for the research on dynamic characteristics of working mechanism. The resolved results of the model can provide reference for structural design and performance improvements of working mechanism.