Research on the characterization of vehicle&rsquo;s pyroshock based on SPH-FEM coupling method

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (11) : 68-74.

Research on the characterization of vehicle’s pyroshock based on SPH-FEM coupling method

ZHU Dong-jun1,2 CHU Wen-hua3,4 LIANG De-li5 WANG Shi-ping1,6

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Abstract

A model for analyzing vehicle’s pyroshock was established base on SPH-FEM coupling method, the coupled SPH-FEM method employs SPH particles in the higher distortion regions for explosion bolt and finite elements for vehicle’s separate structure．The characterization of vehicle’s pyroshock is studied by changing the order of bolt initiation sequence and initiation interval. The numerical results well agree with the experimental results and thus verify the accuracy of the model. Study shows that, the best detonating sequence is to let the top and bottom bolts detonate firstly; Explosion bolts detonate in a certain order and interval, which can effectively alleviate the explosive impact to the separate structure; the best initiation interval is , and the bolts initiation interval should not more than .

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ZHU Dong-jun1,2 CHU Wen-hua3,4 LIANG De-li5 WANG Shi-ping1,6. Research on the characterization of vehicle’s pyroshock based on SPH-FEM coupling method[J]. Journal of Vibration and Shock, 2015, 34(11): 68-74

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