Fourier本征变换在断裂动力学边界元法中的应用

Use of Fourier Eigen Transform in Boundary Element Method of Dynamic Fracture Mechanics

将Ｆｏｕｒｉｅｒ本征变换应用于瞬态弹性动力学边界元法中，讨论了其反变换的数值方法及其应用于弹性动力学边界元法的优越性，并将此方法应用于裂纹尖端的动态应力强度因子的边界元分析．从计算结果来看，在保证精度的前提下，本文方法可提高计算速度５～１０倍．

In this paper, Fourier eigen transform is used in the boundary element method of elasto-dynamics.The numerical method of Fourier eigen transform and the advantages that the method is applied in the boundary element method of elastodynamics are discussed.We use the method in dynamic stress intensity factor. From the result of the paper,the method can raise the computing speed by 5～10 times when the precision is assured.