基于ANSYS Workbench的激光雷达测试支架优化设计

Optimization Design of Laser Radar Test Bracket Based on ANSYS Workbench

针对航天产品轻量化与高可靠性的设计要求,使用拓扑优化和尺寸优化技术来控制航天结构部件质量。以激光雷达测试支架为例,采用ANSYS Workbench中变密度法开展拓扑优化,获得支架结构的主传力路径;针对变密度法中灰度单元与锯齿边界问题,采用多边形曲线拟合得到初始拓扑结构。在此基础上进行有限元分析选取关键结构尺寸参数,利用ANSYS Workbench参数优化模块完成结构尺寸优化。结果表明:所设计的激光雷达测试支架在减质量68.79%后,仍可满足力学性能要求,验证了所提方法的有效性。

To realize the lightweight and high reliability of aerospace products, topology optimization and size optimization are adopted to control the quality of components of aerospace structures. With laser radar test bracket as an example, the Solid Isotropic Material Penalty(SIMP) method in ANSYS Workbench is used for topology optimization to obtain the main force transmission path of the test bracket. To solve the problem of gray unit and sawtooth boundary in the SIMP method, polygon curve fitting is applied to obtain the initial topological structure. On this basis, the finite element analysis is performed to select the key structural size parameters, and the ANSYS Workbench parameter optimization module is utilized to complete the structural size optimization. The analysis results show that the laser radar test bracket structure meets the requirement of mechanical with a 68.79% reduction in weight, which verifies the effectiveness of the proposed structure design method.