Influence of pulse duration on transient responses of cylindrical shells

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (3) : 108-113.

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Influence of pulse duration on transient responses of cylindrical shells

Wang Junping, Mao Yongjian, Di Fei, Huang Hanjun

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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.

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cylindrical shell / X-ray / transient response / pulse duration

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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