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振动波在非均匀梁中传播是一个复杂而难以表述的行为。通过计算非均匀梁任两截面间振动波传播的透射系数矩阵和反射系数矩阵来反映波的传播特性 ,并给出计算迭代公式。在实例中给出行进波所携功率流的计算表达式 ,并计算功率流在非均匀梁中的透射系数和反射系数。结果表明 :对功率流的影响主要是梁的非均匀程度 ,而梁的布置方向对其几乎无影响 ;迭代计算法具有很好的收敛性和准确性。
Vibration wave propagation in non-uniform beam is a complex and difficult to express behavior. By calculating the transmission coefficient matrix and the reflection coefficient matrix of the vibration wave propagation between any two cross sections of the non-uniform beam, the wave propagation characteristics are reflected and the iterative formula is given. The calculation formula of the power flow carried by the traveling wave is given in the example and the transmission coefficient and the reflection coefficient of the power flow in the non-uniform beam are calculated. The results show that the main influence on power flow is the non-uniformity of beams, and the arrangement direction of beams has little effect on them. The iterative method has good convergence and accuracy.