飞机主起落架舱门变形分析与边界约束优化

Deformation analysis and boundary constrained optimization on the aircraft main landing gear door

基于有限元软件Patran和Nastran,对一种常见的短程民用飞机主起落架舱门在空中严重工况下的变形进行仿真分析,并通过试验验证有限元模型的准确性;最后,根据有限元仿真分析结果对舱门的边界约束进行优化,并将优化后的舱门变形情况与优化前进行对比分析;分析结果表明,优化边界约束后的舱门变形量显著减小,其结构应力水平明显降低。

This article makes a simulated analysis on main landing gear door of a common short-range civil aircraft under serious air condition based on finite element software Patran and Nastran, and verifies the correctness of the finite element model. Lastly, boundary constrained optimization is performed on the door according to finite element analysis result, and the door`s deformation before and after optimization was compared and analyzed. The analysis result indicates that the door`s deformation and structure stress are obviously decreased after boundary constrained optimization.