基于回传射线矩阵法，通过节点的力平衡和位移协调条件及局部坐标系下单元两端位移之间的关系，建立方波脉冲激振力作用下铰接T形框架的回传射线矩阵。在此基础上分析了弹性波在框架中的传播特征，探讨了单元交界点处的反射波、入射波与透射波的波形特征。以回传射线矩阵法为基础，求解此框架的自振频率，并与有限元法求出的结果进行比较，结果表明，二者之间的结果非常接近，以此证明了该方法的有效性。
Abstract
Based on the method of reverberation-ray matrix, established the reverberation-ray matrix of frame by force balance ,displacement compatibility conditions of joints and the relationship between displacements at two ends of each element. on this basis,Analysed the characteristics of elastic wave propagation in frame. Discussed the basic waveform characteristics of the incident wave , reflected wave and transmitted wave. Solved the natural vibration frequency of the frame and comparing with the result by the finite element method, showed the results are very close. verified the effectiveness of this method.
关键词
回传射线矩阵法 /
弹性波 /
框架结构 /
自振频率
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Key words
method of reverberation-ray matrix /
elastic wave /
frame structure /
natural frequency
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