基于SPH-FEM方法的水下近场爆炸数值模拟研究
发布时间：2019-01-18 16:20
【摘要】：针对结构水下近场爆炸载荷作用响应求解难点,通过改进的三维轴对称光滑粒子流体动力学方法(Smoothed Particle Hydrodynamics,SPH)计算获得近场爆炸载荷后传输给非线性有限元软件ABAQUS,利用声固耦合模型对结构响应进行时域非线性计算,形成预报水下近场爆炸载荷对结构毁伤的SPH-FEM模型,实现从药包起爆、结构大幅变形、局部撕裂直至完全剪切破坏的全过程模拟,对载荷时历曲线进行试验验证。计算背空矩形钢板在近场爆炸载荷的响应表明,数值结果与试验值吻合良好。SPH-FEM模型计算效率高、可操作性强,易推广至大型复杂结构受水下近场爆炸毁伤的分析与评估。
[Abstract]:The nonlinear finite element software ABAQUS is obtained by means of improved three-dimensional axisymmetric smooth particle hydrodynamics (SPH), which is used to solve the problem of the structure underwater near-field explosion load. By using the acoustic-solid coupling model to perform time-domain non-linear calculation on the structure response, a SPH-FEM model for predicting the damage to the structure of the underwater near-field explosion load is formed, The load-time curve is tested and verified. The response of the calculated back-air rectangular steel plate to the near-field explosion load shows that the numerical results are in good agreement with the test value. The SPH-FEM model has the advantages of high calculation efficiency and strong operability, and is easy to be extended to the analysis and evaluation of the damage of the large complex structure under the underwater near field explosion.
【作者单位】： 哈尔滨工程大学船舶工程学院;哈尔滨船舶锅炉涡轮机研究所;
【基金】：国家自然科学基金资助(51279038;51479041)
【分类号】：U674.70
，
本文编号：2410890
[Abstract]:The nonlinear finite element software ABAQUS is obtained by means of improved three-dimensional axisymmetric smooth particle hydrodynamics (SPH), which is used to solve the problem of the structure underwater near-field explosion load. By using the acoustic-solid coupling model to perform time-domain non-linear calculation on the structure response, a SPH-FEM model for predicting the damage to the structure of the underwater near-field explosion load is formed, The load-time curve is tested and verified. The response of the calculated back-air rectangular steel plate to the near-field explosion load shows that the numerical results are in good agreement with the test value. The SPH-FEM model has the advantages of high calculation efficiency and strong operability, and is easy to be extended to the analysis and evaluation of the damage of the large complex structure under the underwater near field explosion.
【作者单位】： 哈尔滨工程大学船舶工程学院;哈尔滨船舶锅炉涡轮机研究所;
【基金】：国家自然科学基金资助(51279038;51479041)
【分类号】：U674.70
，
本文编号：2410890
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