Research on reliability test method of MR damper based on damage equivalent

Abstract

In order to get the more accurate damping capacity and durability of MR damper in the real vehicle conditions. On the basis of fully understanding the working state and damping regulation principle of the MR damper, taking the control current of the MR damper as the variable, the damping characteristic curves under different control currents are obtained. Based on Miner's law and the theoretical support of pseudo damage, through the durability comparison test under three different current control logic combination conditions, a more suitable reliability durability test method for the MR damper is obtained. The results show that under the condition of specific current, the damping value of MR damper will increase with the increase of speed; Under the condition of specific speed, the damping value of MR damper will decrease with the increase of current, and the damping value of MR damper is maximum when there is no current through; The results show that the verification methods that check the damping force and oil leakage of the shock absorber under three different conditions are effective. The second dual frequency durability test method under the condition of current control logic combination can not only shorten the duration of the whole durability test, but also take into account the impact of current change on the durability of the shock absorber, and has more popularization and application value.