某轻型牵引炮摇架结构动态优化设计

某轻型牵引炮样机在实验过程中发现，其摇架结构具有在保证刚强度的前提下进一步进行减重的必要；针对这一问题，建立基于非线性有限元理论的全炮刚柔耦合动力学有限元模型，计算分析得到摇架动态响应；选取摇架的外形尺寸和板厚作为设计参量，对有限元模型参数化，以质量和应变能最小作为设计目标，使用最优拉丁超立方试验设计法构造径向基函数近似模型，运用第二代非劣排序遗传算法对摇架结构进行多目标动态优化，获得 Pareto前沿；优化结果对于摇架结构设计具有工程应用价值，对于一般薄壁结构问题也提供了一种设计思路。

Dynamic Optimization for Cradle Carriage of A Lightweight Towed Howitzer

In the process of test of a lightweight towed howitzer,it was found that further weight reduction under the condition of considering mass,stiffness and dynamic strength,was necessary for its cradle carri-age.Pointing to this problem,a rigid-flexible coupling dynamics FE model was built based on nonlinear fi-nite element theory.The dynamic response of cradle was acquired.The structural sizes and thickness were selected as design variables,and the mass and strain energy were defined as optimization objectives.A RBF model was built by using the OLHD,the NSGA-II was employed as the optimization method,and a Pareto optimal front was acquired.The results have engineering value for guiding the cradle design of how-itzer.It also provides a design solution for general thin-wall structure problem.