负载模拟器弹性杆的结构优化与有限元分析

Load simulator elastic rod structure optimization and finite element analysis

为提高电动负载模拟器中弹性杆的性能,对其进行结构优化与有限元分析。根据扭转强度条件,确定弹性杆的最小直径;根据电动负载模拟器的加载梯度,对弹性杆的长度进行优化设计;以减小弹性杆所受应力为原则,运用零阶优化算法对过渡圆角半径进行优化设计,得到最优解。利用ANSYS软件对弹性杆进行模态和疲劳寿命的有限元分析,仿真结果表明弹性杆的固有频率和疲劳寿命满足电动负载模拟器的使用要求。研究结果对弹性杆在电动负载模拟器中充分发挥作用以及进一步的优化设计具有指导意义。

For elastic rod used in the electric load simulator,in order to improve its performance,its structure was optimized and analyzed in finite element method.According to the torsional strength conditions, the minimum diameter electric rod was determined. The length design of the electric rod was optimized with the load gradient of load simulator. To reduce the stress of the electric rod, the zero-order optimization was used for the optimization and optimal solution was obtained. The ANSYS software was used for finite element analysis of the elastic rod modal and fatigue life analysis.Simulation results show that the natural frequency of the elastic rod and fatigue life meet the electric load simulator requirements.The results of elastic rod in the electric load simulator plays a role and has guiding significance in further optimized design.