基于响应云图及正交试验法的TVD参数优化

TVD Parameter Optimization Based on Response Diagram and Orthogonal Experiment

为探究橡胶扭振减振器(TVD)惯性环转动惯量和橡胶件扭转刚度对发动机曲轴系减振性能的影响,同时对TVD进行最优参数选取,采用EXCITE Designer软件对曲轴系扭振进行数值模拟,绘制扭振响应云图,分析TVD惯性环转动惯量与橡胶件扭转刚度两个主要因素对发动机曲轴系固有频率、单阶最大扭振幅值、总阶最大扭振幅值和耗散功等的影响.在不改变TVD惯性环尺寸情况下确定出正交试验因素研究范围,设计正交试验,分析TVD各关键因素对各指标影响的主次顺序及规律,并添加约束函数,得到在TVD惯性环转动惯量采用原值(0.0037kg·m^(2))下最优的TVD橡胶件扭转刚度为18535.5(N·m)/rad.将优化后TVD参数重新代入软件校核,并进行曲轴扭振台架试验,软件校核结果与优化结果误差在5%以内,经验证该设计满足要求.

To study the influence of rubber torsional vibration damper(TVD)parameters on torsional vibration performance of engine crankshaft system and to select the optimal parameter of TVD in consideration of the cost,a numerical simulation based on EXCITE Designer software was used to draw response diagram and analyze the influences of TVD moment of inertia and rubber stiffness on crankshaft inherent frequency,maximum amplitude of torsional vibration,maximum amplitude of synthesis,maximum dissipated power and other indicators.The orthogonal experiment design were determined without changing the moment of inertia of TVD.Orthogonal experiment design was proposed to analyze the influence of each TVD parameters on each index,and a constraint function was added to obtain the optimal values.The results show that,when the initial moment of inertia keeps to its original value of 0.0037kg·m^(2),a set of optimal values are obtained with the TVD rubber stiffness of 18535.5(N·m)/rad.The optimized TVD parameters were replaced into the EXCITE software for verification and the crankshaft torsional vibration bench test was carried out.The error between the optimization simulation and the test result is found to be within 5%.The test result show that the design meets the design requirements.