基于Kriging代理模型鼓式制动器稳定性的优化设计

Optimization design of drum brake stability based on Kriging surrogate model

针对鼓式制动器出现的制动噪声问题,引入Kriging代理模型,对鼓式制动器稳定性进行优化设计。采用最优拉丁超立方设计(optimal Latin hypercube design,Opt LHD)生成样本点数据,代入鼓式制动器有限元模型进行求解,生成Kriging代理模型和进行代理模型的精度检验。以摩擦衬片、制动鼓和制动蹄的杨氏模量为设计变量,以加权不稳定倾向系数为目标函数,建立了鼓式制动器稳定性的优化设计数学模型。采用多岛遗传算法(multi-island genetic algorithm,MIGA)进行优化设计。结果表明:引入Kriging代理模型可以大大提高鼓式制动器稳定性优化的求解效率;通过优化设计能够提高鼓式制动器的稳定性,抑制制动噪声。

Aiming at the brake noise problem of drum brake,Kriging surrogate model was introduced to do optimization design for the stability of drum brake.The optimal Latin hypercube design(Opt LHD)was used to generate sample point data,they were substituted into the finite element model of drum brake to generate the surrogate model,and the model accuracy test was done.Taking Young moduli of friction lining,brake drum and brake shoe as design variables and weighted instability tendency coefficient as the objective function,the mathematical model for drum brake stability optimization design was established.The multi-island genetic algorithm(MIGA)was adopted to do optimization design.The results showed that introducing surrogate model can greatly improve the solving efficiency of drum brake stability optimization;optimization design can improve the stability of drum brake and suppress braking noise.