基于Workbench的主起落架车架前轮叉应力分析及结构优化设计

针对某型飞机主起落架车架前轮叉根部多次出现疲劳裂纹,前轮叉作为主起落架车架的关键件,其性能优劣严重影响起落架的安全性。利用ANSYS Workbench仿真软件对其结构进行应力分析,得到其薄弱部位,利用拓扑优化和多参数优化相结合的方法对其结构进行优化和对比分析。分析得到的薄弱部位与实际使用情况相吻合,优化后的结构合理,受力明显改善,质量比优化之前减少了17.3%。

Stress Analysis and Structure Optimization of Main Landing Gear Frame Front Fork Based on Workbench

Based on main landing gear frame front fork root of a certain aircraft multiple occurrences of fatigue crack,the front fork as main landing gear frame key-module,seriouly influence safety of the landing gear.Through stress analysis of the structure using ANSYS Workbench simulation softwarely,weak positions of the frame front fork were obtained,and its structure and comparative analysis were optimized by combination of topology optimization and goal driven optimization method.Obtained weak parts were in conformity with the actual usage,structure is reasonable,stress obviously improved,and weight decreased by 17.3％ than before optimization.