The result shows: the dimension disposal of the triangular groove used in inlet and outlet way should be unsymmetrical, and plate noises can be controlled well after using triangular groove.
For one step direct method, it is essential to have a two dimension pattern plate with high resolution, high contrast and low noise.
一步直接法，必须要有高分辨率，高对比度和低噪声的二维模板，否则必然导致失败。
3
The velocity at the free face of a thick steel plate impacted by an explosive plate is calculated by means of the two-dimension dynamic finite element analytical method.