Abstract
In order to establish the virtual design method of shaking table test of structure in sine-swept vibration, the accurate sine-swept function in logarithmic variety is proposed by theoretic derivation. According to the numerical simulation, the dynamic response of structure in sine-swept vibration by multi-support excitation is acquired. And the maximum amplitude is less than that of structure in sine-swept vibration by single-support excitation based on the comparison with each other. However, several orders vibration mode are excited by the sine-swept vibration in multi-support excitation, and the structure resonates many times, which will increase the damage probability of structure. In other words, the load case of sine-swept vibration by multi-support excitation is worse than the case of sine-swept vibration by single support excitation. The conclusions above can provide basis for design and dynamic time-domain analysis of aerospace products of shaking table test in sine-swept excitation.
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