| 阮剑武,王莉华,周跃亭.基于统一半解析边界的ISPH流固耦合模拟[J].计算力学学报,2025,42(4):564~571 |
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| 基于统一半解析边界的ISPH流固耦合模拟 |
| ISPH fluid structure coupling simulation based on unified semi analytical boundary |
| 投稿时间：2024-02-20 修订日期：2024-05-22 |
| DOI：10.7511/jslx20240220001 |
| 中文关键词: 不可压缩流 SPH 流固耦合 边界条件 自由表面流 |
| 英文关键词:incompressible flow SPH fluid solid coupling boundary condition free surface flow |
| 基金项目:国家自然科学基金(12272270)资助项目 |
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| 中文摘要: |
| 采用基于统一半解析边界处理的不可压缩SPH方法对流固耦合问题进行数值模拟。为了解决传统ISPH方法在模拟剧烈流体冲击的问题容易发生的粒子穿透问题,通过自由面压力修正方法提高了SPH方法中自由面粒子与边界之间的排斥力,缓解了粒子穿透问题。结合防穿透算法,自由面的稳定性可得到进一步改善。三个刚体入水问题的数值模拟验证了本文改进的ISPH方法在流固耦合问题中具有较好的精度。 |
| 英文摘要: |
| In this paper,an incompressible SPH method based on unified semi-analytical boundary treatment is used to numerically simulate fluid-structure coupling problems.To solve the problem of particle penetration that is prone to occur in traditional ISPH models during severe fluid impacts,this article improves the repulsive force between free surface particles and boundaries in the SPH method through the free surface pressure correction method,alleviating the problem of particle penetration.By combining anti-penetration algorithms,the stability of the free surface can be further improved.In numerical examples,the numerical simulation of three rigid bodies entering the water verifies that the improved ISPH method in this paper has good accuracy in fluid-structure coupling problems. |
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