脉冲激励下的结构模态与模态能量

Principal Modal and Modal Energy of A Structure under Excitation of Impulse

研究了脉冲激励下结构的响应、结构位移模态及结构模态能量的分布．分析了高阶模态对结构振动影响的问题，从而说明了高阶模态对结构振动位移的贡献随着模态阶数的上升而逐步减小这一事实．

The authores discuss impulse response,principal mode and distribution of modal stress energy of a multi degree of freedom system.Theoretically,the analytical results show that the influence of the higher order mode on the free response gets weaker as the modal order increases.It proposes that such influence should be considered separately in the reseach of displacement modes and stress modes.