周边固支效应靶薄板冲击响应的稳健性分析

Analysis of Shock Response Robustness for Effect Target Sheet with Peripheral Fixed Support

为分析周边固支效应靶的变形稳健性,结合薄板冲击响应模型,建立薄板变形稳健性的表征方法和极限状态函数,提出了一种基于Monte‑Carlo法的薄板变形稳健性分析方法,并探讨抽样次数、载荷参量、几何参量和材料参量对变形稳健性及灵敏度的影响。结果表明:当抽样次数大于30万次时,薄板变形稳健性结果趋于稳定,说明其非线性较强;薄板变形稳健性随半径厚度比、厚度的增大而降低;薄板半径标准差的灵敏度最大,是薄板变形稳健性的主控参量。研究结果为周边固支效应靶的设计与压力测量应用提供了参考。

The characterization method and the limit state function of the deformation robustness for the effect target sheet with peripheral fixed support are established via the shock response calculation model.Then,the analytical algorithm of the deformation robustness for the sheet is proposed based on the Monte-Carlo sampling estimation.Consequently,the influence of the sampling times,geometric parameters,load parameters,material parameters on the deformation robustness and sensitivity is researched.The results show that the deformation robustness tends to be stable when the sampling times is greater than 300000.It is illustrated that the deformation robustness is strong nonlinear.The deformation robustness of the sheet reduces as the radius-thickness ratio and thickness increase.The sensitivity of the standard deviation of the thin plate radius on the deformation robustness is the greatest,which is the main control parameter of the deformation robustness.The study in this article is valuable for the design and pressure measurement application of the effect target with peripheral fixed support.