基于正交试验法的舵板缓冲吸能结构仿真与优化

Simulation and optimization of helm's buffer energy absorbing structure based on the orthogonal experiments

缓冲装置是水下航行体舵板的组成部分,主要通过缓冲管的压溃变形延长复杂流场对舵板的冲击时间和载荷峰值。为分析不同缓冲结构方案的吸能效果,本文基于正交试验法对影响缓冲吸能效果的内管数、内管壁厚和材料类型等3个因子,在不同的水平下进行搭配组合并确定仿真方案。分析结果表明,选用不锈钢材料、内管壁厚5mm的三内管结构对于保护舵板效果最好。通过落锤冲击试验,研究了不同冲击载荷下缓冲管变形吸能规律,同时也对仿真分析模型进行了校验。

The buffer device is an import part of some an underwater vehicle′ helm., which extends the impact time and peak load if the complex flow field on the rudder plate mainly through the collapse deformation of the buffer tube. In this paper, based on the orthogonal test method, the number of inner tubes, the thickness of inner tubes and the type of the material which affect the energy absorption effect are combined at different levels and the simulation schema is determined. The results show that the three tub structure with stainless steel material and inner wall thickness of 5 mm is the best one to protect the helm. The energy absorption law of the buffer tube under different impact loads is studied by drop weight test, and the simulation analysis model is also verified.