ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

The result of design was affected by the variation of parameters, and the model of robust optimal design was established with the robust optimal design theory. Considering the variation in the mean value and variance of objective function and constraint function, the optimization model was built, which took decoupling of energy distribution as an objective, and stiffness parameters of mountings as a design variation. Particle swarm optimization (PSO) was adopted to optimize an engine mounting system to the stiffness of mountings, and the Monte Carlo method was used to analyze the optimization values. An example showed the method presented could decrease the sensitivity of decoupling with respect to the stiffness of mountings, and could make the vibration coupling distribution more reasonable. Comparing with the genetic algorithms, the optimization design computational efficiency of engine mounting system could be obtained quickly by PSO.