研究了对建模作用显著的控制点检验方法，使模型达到优化并提高精度。
A test method to optimize the model and to enhance the accuracy is given.
如此，既能与边界单元几何形状基本拟合，又能高精度地模拟裂纹尖端附近位移和应力变化规律，并提高计算效率。
So such, both shape consistent with boundary element geometrical shape, and simulate crack tip close-by variety law of stress and strain with higher precision, and enhancing calculative efficiency.
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