基于尺寸-拓扑耦合效应的火炮摇架轻量化设计

Lightweight design of artillery cradle based on dimension-topology coupling effect

火炮摇架是火力系统主要承重部件之一,其质量占比较大,轻量化设计是其减重和提高火炮机动性的重要手段。目前轻量化设计方法未虑及尺寸参数与拓扑结构间作用规律,以致火炮摇架难以达到最佳刚度质量比。为解决上述问题,提出了一种基于尺寸-拓扑耦合效应的轻量化设计方法,通过正交设计与拓扑优化,生成不同尺寸火炮摇架的拓扑结构,采用响应面法构建表征尺寸参数、拓扑结构与刚度、质量映射的代理模型,利用智能算法开展全局优化,实现尺寸参数与拓扑结构同步轻量化设计。以某型火炮摇架为例进行分析,结果表明:相同刚度条件下,所提设计方法比原有方法得到的质量降低了10.8%,最大等效应力减小了35.8%。

The artillery cradle is a primary load-bearing component of the firepower system,and its weight contributes significantly.Lightweight design plays an important role in weight reduction and improving the artillery’s maneuverability.However,the present lightweight design technique failed to consider the interdependency between dimensional parameters and topological structure,hindering the artillery cradle from achieving the ideal stiffness to mass ratio.A lightweight design method grounded in dimension-topology coupling effect was introduced to tackle the aforementioned issues.By means of orthogonal design and topology optimization,various topology structures of cradles with distinct dimensions were generated.Additionally,response surface method was implemented to devise agent models that embody dimensional parameters,topology structure,as well as stiffness and mass mapping.Global optimization was performed using intelligent algorithm to achieve concurrent lightweight design of dimensional parameters and topology structure.A particular type of artillery cradle was exampled to conduct analysis.The findings shown that under the same stiffness conditions,the proposed design method reduced the weight by 10.8%and the maximum equivalent stress by 35.8%compared to the original method.