刚架结构中瞬态波的传播

摘要

Based on modified Reverberation Matrix Method and introducing the model of joint mass-damping, transient waves of frame structures is investigated by ray method. It is concluded from the result that joint damp influences the propagation of wave much more than joint mass. Suitable joint can effectively obstruct the propagation of wave so that the response of the local of structures can be controlled passively. It is also useful for the damage detection of frame.%在改进回传矩阵法的基础上，引入节点质量阻尼模型，结合射线展开技术，研究刚架结构中的弹性瞬态波的传播。根据分析结果可以看出，节点质量对弹性波的传播影响不大，节点阻尼对弹性波的传播影响很大。如果选取合适的节点，就可以阻碍波在结构局部中的传播，达到结构局部控制的目的。刚架结构中的弹性瞬态波的传播，可以对大型刚架结构的无损检测提供一定的帮助。