无砟轨道精调车轻量化设计

Lightweight design of accurate adjustment vehicle

为使无砟轨道精调车结构悬臂处静刚度满足设计要求,并减少结构自重,对其进行优化设计。考虑到结构动态特性对结构性能的影响,首先,运用ANSYS软件对其进行谐响应分析,得出对精调车结构动态特性影响最大的固有频率;然后,以该阶频率和结构自重为优化目标,利用最优拉丁超立方试验设计方法对各变量进行灵敏度分析,获取最终设计变量;最后,在ISIGHT软件中建立了精调车结构的响应面近似模型,并利用粒子群算法对响应面近似模型进行多目标寻优。优化结果表明,精调车结构自重下降了6. 78%,第5阶固有频率上升为15. 67 Hz,满足了悬臂处静刚度设计要求,研究结果可为类似的精调车结构设计和改进提供参考。

In order to make the static stiffness of the accurate adjustment vehicle meet the design requirements and reduce weight of structure, the optimal design is carried out. Considering the influence of structural dynamic characteristics on the structure, firstly, the ANSYS is used to analyze the dynamic characteristics of the structure, and the natural frequency which has the greatest impact on the dynamic characteristics of the structure is obtained. Then, take the weight and the frequency of the structure as optimization objectives. With the analysis of design variables on the sensitivity of each responses by optimal latin hypercube design method, the final design variables are obtained. Finally, response surface approximation model is established and it is optimized by using particle swarm optimization algorithm. The optimization results show that while the structure weight of the vehicle decreases by 6. 78 %,the fifth order natural frequency rises to 15. 67 Hz,and the static performance meets the design requirements. The research results can provide guidance for the design and improvement of similar structural of accurate adjustment vehicle.