Numerical study on the water entry of curved wedges

Numerical study on the water entry of curved wedges
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曲线楔块入水数值研究

DOI:
10.1080/17445302.2018.1471776
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发表时间:
2018-05
影响因子:
2.1
通讯作者:
Ong Muk Chen
Ong Muk Chen
中科院分区:
工程技术4区
文献类型:
--
作者:
Yu Pengyao;Li Hui;Ong Muk Chen

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楔形体是高速船舶底部的典型断面形式,其入水问题一直是研究的热点。虽然大多数研究都集中在扁楔上,但几何曲率对刚性截面入水的影响尚未得到充分分析。本文采用显式有限元法对曲楔入水问题进行了数值研究。对两种典型的曲楔进行了收敛性研究。通过与实验数据的比较,验证了数值计算方法的正确性。此外,还模拟了不同形状曲楔在不同撞击速度和运动状态下的入水过程。并讨论了曲率和撞击速度对撞击力、砰击压力分布和润湿宽度的影响。
ABSTRACT The water entry problem of wedges has attracted a great deal of research, as the V-shaped cross-section is a typical section form of the bottom of high-speed crafts. While most investigations focus on flat wedges, the effect of geometric curvature on the water entry of rigid sections is yet to fully be analysed. In this paper, the water entry of curved wedges is numerically investigated using the explicit finite element method. A convergence study is conducted for two typical curved wedges. The numerical method is validated by comparing the impact velocity and the penetration depth with the experimental data. Moreover, the water entry of different curved wedges is simulated with different impact velocities and motion states. And the influences of the curvature and the impact velocity on the impact force, the slamming pressure distribution and the wetted width are investigated and discussed.
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