Multiple Steps Analysis of the Mechanical Performance of an Air Spring Based on APDL

摘要

A method for testing air springs was advanced in the beginning. Moreover, test device was introduced as well. Then APDL was utilized to simulate static and dynamic test process. In the simulation,multiple load steps solution was carried out through APDL *DO-LOOP and array parameter method. Capsule volume calculating macro based on scatter sum method enabled the loop. Scalar parameter PRESSURE was established as inner pressure tracking parameter to update inner pressure. Table parameter PRESSURES was established as inner pressure output parameter to export inner pressure of each load step. Comparison was done between static simulation results and corresponding test data to prove feasibility of multiple steps analysis. In consequence, some major parameters such as cord angle, initial inner pressure and auxiliary chamber volume were taken into account, which have remarkable effect on static mechanical performance of EQ6111 air spring. Finally, the same method was applied to simulation of dynamic test process, achieving abundant analysis results according to different load frequencies varying from 0.5Hz to 2.5Hz. Load frequency throw remarkable effects on dynamic mechanical performance of EQ6111 air spring, because inertial effect and damping effect play important roles thereinto. The study is to make contribution to the development of Platform of Air Spring Simulation and Parameterized Design (PASSPD).