简述了方程的离散化及有关的数值技术。
The discretization and relevant numerical technique for the equation are briefly described.
最后由积分方程的离散化方程组有非平凡解的条件，求得固有频率。
Finally, natural frequency is obtained by the existence condition of nontrivial solution of the discrete algebraic equations derived from the integral equations.
建立了适体坐标系下的离散化控制方程组，采用附加源项法对控制方程组的能量和动量边界条件进行了离散。
The additional source term method is utilized to discretize both energy and momentum boundary conditions and the discretized governing equations in body-fitted coordinates are established.
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