基于虚拟车桥试验台的后桥疲劳寿命预估

Prediction of Rear axle Fatigue Life Based on Virtual Axle Test Rig

摘要:

介绍建立车桥虚拟试验台系统的方法流程，给出虚拟试验台机械系统和液压系统的建立方法，通过编程实现了虚拟试验台的控制算法即频域迭代自学习控制算法.通过联合仿真实现虚拟试验台载荷施加，对某扭转梁式后桥进行虚拟试验.利用虚拟试验所得的车桥边界条件，结合有限元分析方法对后桥疲劳寿命和损伤进行了预估，并与试验结果比较，结果表明两者具有较高的一致性.

Abstract:

The paper presents an entire process to establish the virtual axle test rig system and the method to establish the mechanic system and hydraulic system. The control algorithm of the virtual test, frequency domain iteration learning control, is programmed. The load is realized through co simulation and a rear axle is chosen for virtual test. With the rear axle boundary conditions from the virtual test and the finite element method, the fatigue life and the damage of the rear axle are predicted. A comparative study of the results with those from the real test shows that they are in accordance with each other.