某型装甲车制动器热-应力-磨损耦合仿真分析

为提高鼓式制动器在热-应力耦合影响下磨损计算的准确性,考虑实际制动过程中温度升高对制动器性能的影响,通过增加温度与磨损率的变化关系修正传统Archard磨损模型,对某型装甲车鼓式制动器进行仿真计算.分析结果表明,在热-应力有限元迭代求解过程中,采用完全耦合法持续更新制动器磨损面的几何形状可以不断地修正热-应力的计算结果,因此能更真实地描述制动过程中热-应力-磨损的复杂耦合现象.仿真得到制动器在4种典型工况下的磨损规律,为制动器的优化设计提供依据.

Simulation analysis of thermal-stress-wear on brake of an armored vehicle

To improve the accuracy of wear calculation of drum brake under the influence of thermal stress coupling, the influence of the temperature rise on brake capacity in the actual braking process is considered, and the traditional Archard wear model is modified by adding the relationship of temperature and wear rate, and then the drum brake of an armored vehicle is simulated. The results show that the thermal stress calculation results can be updated continuously while the full coupling method is used to continuously update the geometry of the brake wear surface in the process of thermal stress finite element iterative solution, and it can more truly describe the complex coupling phenomenon of thermal stress wear in braking process. The wear laws of the brake under 4 typical working conditions are obtained by simulation, which provides the basis for the optimal design of the brake.