载荷脉宽对圆柱壳瞬态响应的影响分析

PDF(3041 KB)

振动与冲击 ›› 2015, Vol. 34 ›› Issue (3) : 108-113.

论文

载荷脉宽对圆柱壳瞬态响应的影响分析

王军评，毛勇建，狄飞，黄含军

作者信息 +

Influence of pulse duration on transient responses of cylindrical shells

Wang Junping, Mao Yongjian, Di Fei, Huang Hanjun

Author information +

文章历史 +

摘要

为认识载荷脉宽对圆柱壳瞬态响应及其对X射线冲击响应模拟等效性的影响规律，定义了等效性评价指标即平均应变差异。以四种不同尺寸的典型圆柱壳为对象，分别加载六种冲量相同、脉宽不同的三角形脉冲载荷，通过数值模拟，获得了平均应变差异随脉宽变化的关系，从结构特性角度分析了变化的原因。发现主要受（脉宽占比）控制，时，平均应变差异在20%以内。本文结果可为模拟X射线冲击环境的试验设计、结果评估和数值模拟提供参考。

Abstract

In order to understand the influence of pulse duration on transient responses of cylindrical shells and futher the fidelity of simulating the X-ray shock responses, the average strain difference, namely the simulation fidelity evaluation index was defined. Six triangle pulses with the same impulse but different pulse durations were loaded on four cylindrical shells in different dimensions. The relation of average strain difference varying with pulse duration was obtained by numerical simulations, and the essence of the relation was discussed in the point of structural characteristics. It was found that the average strain difference is mainly controlled by (the ratio between the load pulse duration and the time of stress wave propagating along the circumference of cylindrical shell). When , the average strain difference is less than 20%. The results could provide references for design and evaluation of test simulations of X-ray shock responses, as well as relevant numerical simulations.

导出引用

王军评;毛勇建;狄飞;黄含军. 载荷脉宽对圆柱壳瞬态响应的影响分析[J]. 振动与冲击, 2015, 34(3): 108-113

Wang Junping;Mao Yongjian;Di Fei;Huang Hanjun . Influence of pulse duration on transient responses of cylindrical shells[J]. Journal of Vibration and Shock, 2015, 34(3): 108-113