弹丸入水特性的SPH计算模拟
发布时间:2018-09-07 10:53
【摘要】:应用SPH方法研究弹丸入水过程中的动力学特征。利用拉格朗日形式的N-S方程自编SPH程序,建立弹丸入水的计算模型,赋予相应的材料参数及状态方程,研究弹丸外形、入水速度和角度等因素对入水过程的影响。模拟结果表明:空化泡的形态及发展规律主要由弹丸的运动姿态决定;弹道越稳定,阻力因数就越小,弹丸的存速就越大。SPH方法具有较强的自适应性,适用于研究弹丸入水的流固耦合问题。
[Abstract]:SPH method was used to study the dynamic characteristics of projectile in the process of water entry. Using the SPH program of N-S equation in Lagrangian form, the calculation model of projectile entering water is established, and the corresponding material parameters and state equation are given to study the influence of the shape, velocity and angle of the projectile on the process of water entry. The simulation results show that the shape and development of cavitation bubbles are mainly determined by the motion attitude of the projectile, the more stable the trajectory, the smaller the resistance factor, and the larger the velocity of the projectile is, the more adaptive the SPH method is. It is suitable for studying the fluid-solid coupling problem of projectile into water.
【作者单位】: 清华大学航天航空学院;
【基金】:中国博士后科学基金面上项目(2015M581081)
【分类号】:O353.4
本文编号:2228057
[Abstract]:SPH method was used to study the dynamic characteristics of projectile in the process of water entry. Using the SPH program of N-S equation in Lagrangian form, the calculation model of projectile entering water is established, and the corresponding material parameters and state equation are given to study the influence of the shape, velocity and angle of the projectile on the process of water entry. The simulation results show that the shape and development of cavitation bubbles are mainly determined by the motion attitude of the projectile, the more stable the trajectory, the smaller the resistance factor, and the larger the velocity of the projectile is, the more adaptive the SPH method is. It is suitable for studying the fluid-solid coupling problem of projectile into water.
【作者单位】: 清华大学航天航空学院;
【基金】:中国博士后科学基金面上项目(2015M581081)
【分类号】:O353.4
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