In this paper, we present a new method to solve the Cauchy's problem of the homogeneous wave equations of three dimensions, which appear comparatively simple and feasible.
本文提出了一类齐次三维波动方程柯西问题求解的新方法，该方法比一般的求解方法更简便。
In this paper, three classes of coupled nonlinear equations are solved respectively, and we obtain solitary wave solution of systems.
本文分别对三类非线性耦合方程组求解，得到了系统的孤波解。
Stress wave propagation equations that incident wave and reflection wave are condition vectors are derived from three discrete forms as well as the characteristic matrix of the force and the velocity.
推导了以顺波、逆波为状态向量的应力波传播方程和杆形部件的作用力、速度传播的特征矩阵；
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