关键词: 有限元, 侵彻, LS-DYNA, 过载信号

Abstract: Using numerical simulation, the models of high-speed projectile penetration of concrete
target board with sensors in different positions are built and then imported in HyperMesh to get the
finite element models. The time-domain signals of sensors at three different locations are acquired by
LS-DYNA. Comparison is made among these signals by the method of frequency-domain analysis.
And it turns out that different installation locations in the projectile test device have different
influences on the frequency constitute of the overload signals. Conclusions have been made that when
the sensor posits in the back of test device, penetration deceleration on rigid-body is clearer and high
frequencies is smaller.

Key words: finite element model, penetration, LS-DYNA, overload signal