Abstract
Wheelset axles are essential parts of railway and mine site rolling stock. For fatigue testing of axles, various test-benches are designed to implement the cyclic loads. The effectiveness of test-bench vibration analysis grows with the use of numerical approach and simulation models created with the aid of visual programming tools. The purpose of the work is to develop and assess the proposed simulation models of test-bench dynamics created with the aid of visual programming tools. Based on mathematical models, the test-bench simulation models of the lever system vibration have been developed. Simulation models are created with the aid of Simulink visual programming tools running under Matlab system. For modelling the components of Simulink, the SimMechanics and DSP System Toolbox Libraries are used. The comparative analysis of proposed models has been made. For the first time, with the aid of Simulink visual programming tools, the set of test-bench vibration simulation models has been obtained in steady-state and transient motion modes for linear task formulation. The proposed S-models allow automation and visualization of the motion dynamics study for test-bench components in order to determine their rational elastic-weight, kinematic and dynamic behavior. Simulation of vibrations was carried out using design parameters of the test-bench metal framework.
Highlights
Axles represent principal parts that determine reliability and safety of railway rolling stock for mining, metallurgical and transportation industries
The checking-out of these parameters is performed on special-purpose test-benches [2 – 4]. Their application pattern and methodology of axle testing are regulated by industry state documents [5, 6]
Results of modelling serve as input data for development of both the best-bench and its parts and units
Summary
Axles represent principal parts that determine reliability and safety of railway rolling stock for mining, metallurgical and transportation industries. The railway rolling stock axles are to meet strict requirements to mechanical-and-physical properties, such as strength, stiffness and fatigue strength [1]. Their application pattern and methodology of axle testing are regulated by industry state documents [5, 6]. In the course of testing axles are loaded with alternating, symmetric or intermittent forces. Designing such testbenches assume mathematical and simulation modelling of their operation in steady-state and transient modes. Simulation modelling significantly intensifies the selection process for test-bench rational layout and design parameters under reliability requirements, and under strength, stiffness and vibration rigidity criteria
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