爆炸冲击载荷下耐压鞍形舱壁结构弹塑性动力屈曲

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (9) : 139-142,.

论文

爆炸冲击载荷下耐压鞍形舱壁结构弹塑性动力屈曲

李荣富1 程远胜1 汪玉2 曾广武1

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ELASTIC-PLASTIC DYNAMIC BUCKLING OF SADDLE-SHAPED BULKHEAD UNDER BLAST IMPACT LOADING

Li Rongfu1 Cheng Yuansheng1 Wang Yu2 Zeng Guangwu1

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摘要

本文借助有限元软件ANSYS/LS-DYNA对耐压鞍形舱壁结构在爆炸冲击载荷作用下的弹塑性动力屈曲进行了研究。采用Budiansky-Roth屈曲准则判断鞍形舱壁的动力屈曲，研究了初始缺陷大小对鞍形舱壁结构动力屈曲的影响，并与等重量的传统三心球面舱壁结构进行了对比，然后讨论了主要设计参数对鞍形舱壁结构动力屈曲的影响。研究表明：鞍形舱壁结构比等重量的三心球面舱壁结构动力屈曲载荷有明显提高，且对初始缺陷不敏感，合理的匹配各设计参数可以使舱壁结构的动力屈曲性能达到最佳。

Abstract

The elastic-plastic dynamic buckling properties of saddle-shaped bulkhead under blast impact loading are studied using the finite element software ANSYS/LS-DYNA. The Budiansky-Roth buckling criterion is utilized to judge the dynamic buckling of saddle-shaped bulkhead, and the effect of initial imperfection amplitude on dynamic buckling of saddle-shaped bulkhead is analyzed and compared with the traditional domed bulkhead which has the same weight, and then the effects of main designing parameters on dynamic buckling of saddle-shaped bulkhead are discussed. The results indicate that the dynamic buckling load of saddle-shaped bulkhead is highly enhanced compared with the traditional domed bulkhead which has the same weight and is insensitive to initial imperfection. The optimal dynamic buckling property will be achieved if design parameters are properly selected.

导出引用

李荣富程远胜汪玉曾广武. 爆炸冲击载荷下耐压鞍形舱壁结构弹塑性动力屈曲[J]. 振动与冲击, 2009, 28(9): 139-142,

Li Rongfu Cheng Yuansheng Wang Yu Zeng Guangwu. ELASTIC-PLASTIC DYNAMIC BUCKLING OF SADDLE-SHAPED BULKHEAD UNDER BLAST IMPACT LOADING[J]. Journal of Vibration and Shock, 2009, 28(9): 139-142,

中图分类号： O347