Then, the calculating method of initial scour velocity of bed sand around submerged spur dikes is suggested.
在分析基础上，提出了漫水丁坝坝头床沙起冲流速的计算办法。
According to Finite Element Method, the impactor is considered as a discrete mass system in terms of 3D solid element with initial velocity, and 2D shell element is used for target plate.
首先采用有限元法，将撞击体离散成由三维实体单元构成的具有一定初始速度的离散质量系统，对靶板采用二维壳单元离散。
The shock initiation process of the JOB-9003 explosive under different initial shock loading was recorded by using the multiple electromagnetic particle velocity gauge method.
采用组合式电磁粒子速度计技术测试了不同初始冲击压力条件下JOB-9003炸药的冲击起爆过程。
A successive approximation method is suggested without value limit of wave velocity. The formulas for calculating the initial propagation velocity of reverse plastic loading boundary are also given.
建议了一个不受波速值限制的逐步近似法，并给出反向塑性加载边界传播速度的计算式。
The modified nonlinear simplex method allows more broad initial values and can effectively accelerate convergence velocity of iteration.
修改单纯形算法对初值的适应范围更亮、能有效加快收敛速度。
A complex velocity model was designed to verify the validity of TVWI method, and the result shows that for the different given initial velocity, all the inversion has relatively high accuracy.
设计了一个复杂的速度模型验证了TVWI方法的有效性，结果表明，在给定不同速度初值的情况下，反演结果都具有较高的精度。
A complex velocity model was designed to verify the validity of TVWI method, and the result shows that for the different given initial velocity, all the inversion has relatively high accuracy.
设计了一个复杂的速度模型验证了TVWI方法的有效性，结果表明，在给定不同速度初值的情况下，反演结果都具有较高的精度。
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