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基于ANSYS有限元软件的结构优化设计功能,以过翼机身架结构的总质量最小为目标函数,综合考虑杆件的刚度、强度、稳定性等约束条件,利用ANSYS有限元分析软件提供的一阶方法对该机身架进行优化,以钢管的基本尺寸为设计变量,提取出经过10次迭代后的结果并进行分析比较。结果表明,优化后的截面尺寸在减少结构用钢量的同时,又适当地减小了桁架的竖向最大挠度,并能够使杆件内力分布更为合理。
Based on the finite element software ANSYS structural optimization design function, taking the minimum total mass of the over wing fuselage structure as the objective function, considering the constraints of rigidity, strength and stability of the rod, the finite element analysis software ANSYS The method is used to optimize the fuselage frame. Taking the basic dimensions of the steel pipe as the design variables, the results after 10 iterations are extracted and analyzed and compared. The results show that the optimized section size can reduce the vertical deflection of truss and reduce the structural steel consumption, and can make the internal force distribution more reasonable.