DYNAMICAL RELIABILITY OF ELASTIC STRUCTURESUBJECTED TO EXPLOSION

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (22) : 118-122.

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DYNAMICAL RELIABILITY OF ELASTIC STRUCTURESUBJECTED TO EXPLOSION

Chen Wei-dong, Chen Hao ,Yu Yan-chun

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Abstract

To study safety performance of elastic structure subjected to random explosive load, based on finite volume method (FVM) a numerical method used to calculate structural reliability index was presented. The partial derivative of responses with respect to basic random variables were obtained with governing equation of FVM; and then the mean values and variances of responses were got based on Taylor expansion; and structural reliability index was calculated by First-Order Second Moment finally. To prove the feasibility of this method, considering explosive charge、distance from structure to explosive and yield stress as basic random variables, the reliability index of a clamped plane subjected to far field explosion was calculated. Compared with response surface method and Monte-Carlo method, the result indicates the method has a higher efficiency and precision, and can be applied in engineering practice effectively.

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explosive / reliability / finite volume method / response surface method / Monte-Carlo method

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Chen Wei-dong;Chen Hao;Yu Yan-chun. DYNAMICAL RELIABILITY OF ELASTIC STRUCTURESUBJECTED TO EXPLOSION[J]. Journal of Vibration and Shock, 2012, 31(22): 118-122