考虑陀螺效应的动力总成悬置系统分析和优化

Analysis and Optimization of Engine-mount System with Gyro Effect

应用陀螺力学理论,对传统动力总成悬置系统的无阻尼动力学方程进行修正,引入陀螺矩阵,得到新的动力学方程。对新的动力总成悬置系统动力学模型进行计算分析,研究了陀螺矩阵对频域、时域响应的影响。使用遗传算法分别对修改前后的方程进行优化计算,并进行比较分析。结果表明,对于低转速发动机,曲轴转动的陀螺效应不明显,而对于高转速的发动机,陀螺效应不能忽略,应以考虑陀螺力矩的方程为基础进行设计分析。

The traditional no-damp equation of a engine-mount system was modified with consideration of gyro effect. To indicate the effect of gyro moment on the mount system, including frequency domain response and time domain response, the new system was analyzed. The engine-mount was optimized for the traditional equation and the new equation, respectively, using the genetic algorithm. The results for two equations were analyzed and compared, which showed that the gyro effect of the crankshaft system could be ignored for low rotating-speed engine and it should be considered for higher rotating-speed engine.