基于拓扑优化的高空作业平台上车架轻量化设计

Lightweight Design of Frame on Aerial Work Platform Based on Topology Optimization

首先,利用分析软件的动力学分析模块,建立臂架举升过程的多体动力学模型,提取上车架与臂架连接位置的载荷曲线,将载荷曲线加载到上车架的结构有限元分析模型,获得上车架的结构强度结果。其次,使用拓扑优化方法分析上车架侧板,获得拓扑优化后的分析结果。最后,根据分析结果,在三维计算机辅助设计(Computer Aided Design,CAD)中重新设计上车架的侧板,实现侧板质量减少46 kg的目标。对优化后的新结构进行结构强度校核,结果表明优化后的结构强度完全满足要求。

In this paper, the multi-body dynamic model of the boom lifting process is established by using the dynamic analysis module under the analysis software, and the load curve of the connecting position between the upper frame and the boom is extracted. The load curve is loaded into the finite element model of the upper frame to obtain the structural strength results of the upper frame. Secondly, the topological optimization method is used to analyze the side plate of the upper frame, and the analysis results after the topological optimization are obtained. According to the analysis results, the side plate of the upper frame was redesigned in 3D Computer Aided Design(CAD), and the goal of 46 kg weight reduction of the side plate was realized. Finally, the strength of the new structure after optimization is checked, and the results show that the strength of the optimized structure fully meets the requirements.