基于Box-Behnken响应面法的SPS烟囱结构设计优化

Structural design of SPS chimney and optimization of Box-Behnken response surface method

为实现舰船轻量化设计,且具备更优良的力学性能,采用钢聚氨酯夹层板(Steel-Polyurethane Sandwich plate,SPS)结构替代传统钢制加筋板,形成新型烟囱结构设计方案,并基于Box-Behnken响应面法开展SPS烟囱结构的优化。以烟囱结构位移和等效应力作为优化目标,结构尺寸和总重量为约束条件,建立优化模型,得到优化后的SPS烟囱结构设计方案,并采用有限元法,对优化前后的方案进行仿真计算;对优化目标进行分析对比,验证了优化结果的有效性和准确性。结果表明,优化后适用的SPS烟囱结构,在减重13.16%的情况下,位移减小19.50%,应力降低31.96%,说明采用响应面法对SPS烟囱实现多目标优化可行,且优化效果明显。

In order to realize the lightweight design of the ship and have better mechanical properties,a steel-polyurethane sandwich plate(SPS)structure are used instead of the traditional steel stiffened plate to form a new chimney structure design scheme,and based on Box-Behnken response surface method for optimization of SPS chimney structure.Taking the displacement and equivalent stress of the chimney structure as the optimization target,the structure size and the total weight as the constraint conditions,an optimization model was established,and the optimized SPS chimney structure design plan was obtained;and the finite element method are used to simulate the calculation before and after the optimization.The comparison and analysis of the optimization goals verify the validity and accuracy of the optimization results.The results show that the optimized SPS chimney structure has a displacement reduction of 19.50%and a stress reduction of 31.96%with a weight reduction of 13.16%,which indicates that it is feasible to achieve multi-objective optimization of the SPS chimney by response surface method,and the optimization effect is obvious.