Design and Mechanical Properties Analysis of Variable Buffer-Force Planing Energy-Absorbing Device for Rail Vehicles

Abstract

Collisions between rail transit vehicles are unavoidable. In order to alleviate the disaster caused by the collision, energy-absorbing and shock-absorbing materials are generally installed at the front end of the rail vehicle. In this paper, a variable buffer-force planing energy-absorbing device for rail transit vehicles was prepared. The buffer force was changed by length (Dx), angle (A) and thickness (W). First, we manufactured one type of material, and data were obtained through experimentation. Second, we used Ls-DYNA to simulate this material, and determined the accuracy between the simulation and the test. Third, various parameters of the material were simulated by Ls-DYNA. The results show that changing Dx greatly affects the performance of the material, W has no obvious effect on the performance, and A is important for the materials properties. Based on finite element simulation, the functional model relationship between the average force and various parameters was deduced. This lays the groundwork for the application of the variable buffer-force planing energy absorbing device.

Study on the pressure distribution of fall arrest belts in the static suspension and falling process

“…22 Plain weave is more robust and firmer than twill weave for more interweaving points. 20 In this paper, plain weave is selected as the weave structure of the webbing. The weaving process of the belt is shown in Figure 1.…”

“…The highspeed camera is also widely used to monitor the falling process of the dummy while wearing a falling seat belt. 16 Most researchers take the whole seat belt as the research object [17][18][19][20][21] during the static suspension and falling process. The force of seat belts in different scenes has been systematically obtained.…”