On the feasibility of using Smoothed Particle Hydrodynamics for underwater explosion calculations
On the feasibility of using Smoothed Particle Hydrodynamics for underwater explosion calculations
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DOI：
10.1007/bf00364078
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发表时间：
1995-02
影响因子：
4.1
通讯作者：
J. Swegle;S. Attaway
中科院分区：
文献类型：
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作者：
J. Swegle;S. Attaway
SPH（光滑粒子流体动力学）是一种无网格拉格朗日方法，它是一种有吸引力的替代目前用于分析高变形脉冲加载事件的数值技术。在本研究中，SPH算法进行了详细的测试和分析，以确定使用PRONTO/SPH的各种类型的水下爆炸问题，涉及流体-结构和冲击-结构相互作用的分析的可行性。特别令人感兴趣的是气泡的形成和崩溃的影响，以及由于这些负载薄壁结构的永久变形。这些都是非常难以建模的问题。过去对各种类型代码的尝试都不令人满意。耦合SPH到有限元程序PRONTO代表了一种新的方法来解决这个问题。结果表明，该方法是非常适合于从水下爆炸载荷传输到附近的结构，但由于重力加速度和气泡浮力的后期效应的计算将需要额外的发展，并可能耦合隐式或不可压缩的方法。
SPH (Smoothed Particle Hydrodynamics) is a gridless Lagrangian technique which is appealing as a possible alternative to numerical techniques currently used to analyze high deformation impulsive loading events. In the present study, the SPH algorithm has been subjected to detailed testing and analysis to determine the feasibility of using PRONTO/SPH for the analysis of various types of underwater explosion problems involving fluid-structure and shock-structure interactions. Of particular interest are effects of bubble formation and collapse and the permanent deformation of thin walled structures due to these loadings. These are exceptionally difficult problems to model. Past attempts with various types of codes have not been satisfactory. Coupling SPH into the finite element code PRONTO represents a new approach to the problem. Results show that the method is well-suited for transmission of loads from underwater explosions to nearby structures, but the calculation of late time effects due to acceleration of gravity and bubble buoyancy will require additional development, and possibly coupling with implicit or incompressible methods.