Application of multiphase Riemann-SPH in analysis of air-cushion effect and slamming load in water entry
Application of multiphase Riemann-SPH in analysis of air-cushion effect and slamming load in water entry
复制标题
多相Riemann-SPH在进水气垫效应和砰击载荷分析中的应用
DOI：
10.1016/j.oceaneng.2022.110789
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发表时间：
2022-03
影响因子：
5
通讯作者：
A.-M. Zhang
中科院分区：
文献类型：
--
作者：
X.L. Fang;F.R. Ming;P.P. Wang;Z.F. Meng;A.-M. Zhang
结构物对水体的影响是海洋工程中一个重要而实际的问题。在某些情况下，空气对冲击特性的影响是不可忽略的。特别地，当平底结构撞击水上时，例如飞机和直升机在水上紧急着陆时，将形成缓冲结构的冲击的气垫，从而减小其砰击载荷。考虑到Riemann求解器在处理不连续性问题上的优势，本文采用PVRS Riemann求解器的多相Riemann-SPH方法分析了入水问题中的气垫效应和砰击载荷。为了减少黎曼解带来的数值耗散，给出了PVRS黎曼解的耗散限制器。通过平板的水砰击试验，首次验证了所采用方法的准确性和收敛性。讨论了气垫和板长对砰击载荷的影响。最后，一个复杂的工程问题，即，对LNG储罐绝热板的砰击进行了数值模拟，分析了撞击速度和横升角对砰击载荷特性的影响。·采用多相Riemann-SPH方法分析了入水问题中的气垫效应和砰击载荷。·为PVRS Riemann求解器设计了一个耗散限制器，以减少过多的数值耗散。·对平板的砰击进行了数值模拟，研究了空气和平板长度对砰击载荷的影响。·分析了撞击速度和横升角对LNG储罐绝热板砰击载荷的影响。
The impact of structure on water is an important and practical issue in ocean engineering. For some cases, the influence of air on the impact characteristics is non-negligible. In particular, when the flat-bottomed structure impacts on water such as the emergency landing on the water of an aircraft and helicopter, the air cushion will be formed which buffers the impact of the structure, thereby reducing its slamming load. In this paper, considering the advantages of the Riemann solver in dealing with discontinuities, a multiphase Riemann-SPH method using the PVRS Riemann solver is applied to analyze the air-cushion effect and slamming load in water entry problems. To reduce the numerical dissipation led by the Riemann solver, a dissipation limiter for the PVRS Riemann solver is given. Through the test of the water slamming of the plate, the accuracy and convergence of the adopted method are firstly validated. Then, the influences of the air cushion and the plate length on the slamming load are discussed. Finally, a complex engineering problem, i.e., the slamming of the LNG tank insulation panel is simulated, and the influences of the impact velocity and deadrise angle on slamming load characteristics are analyzed. • The multiphase Riemann-SPH method is applied to analyze the air-cushion effect and slamming load in water entry problems. • A dissipation limiter for the PVRS Riemann solver is given to reduce the excessive numerical dissipation. • The slamming of the flat plate is simulated, and the effects of the air and plate length on the slamming load are studied. • The influences of the impact velocity and deadrise angle on the slamming load of the LNG tank insulation panel are analyzed.
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影响因子：
2.6
作者：
S. Okada;Y. Sumi
通讯作者：
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DOI：
10.1016/j.cma.2020.113189
发表时间：
2020-08
影响因子：
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作者：
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通讯作者：
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作者：
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DOI：
10.1016/j.jcp.2017.01.027
发表时间：
2017-04
期刊：
J. Comput. Phys.
影响因子：
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作者：
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通讯作者：
Chi Zhang;Xiangyu Y. Hu;N. Adams
影响因子：
6.3
作者：
Antuono, M.;Colagrossi, A.;Molteni, D.
通讯作者：
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