孤立波作用下圆柱桩波浪力计算方法研究

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Abstract In order to study the wave load on the bridge pier of a sea-crossing bridge under the action of solitary waves and obtain the simplified calculation method of solitary wave force, the computational fluid dynamics software OpenFOAM was used to simulate the solitary waves in the ocean. Two groups of simulation experiments were carried out under different incoming wave heights and initial water depths. The three-dimensional numerical simulation was performed to directly calculate the wave force on the cylinder, while the two-dimensional numerical simulation was conducted to obtain the velocity field to derive the Morison equation. By comparing with the results of the existing literatures, this paper discusses the applicability of the original Morison equation to the calculation of solitary wave force and the variation law of solitary wave nonlinearity, and verifies the applicability of the modified Morison equation with nonlinear term to predict solitary wave load. The results obtained are as follows. When calculating the solitary wave load, the nonlinear influence can not be ignored, and with the increase of the ratio of wave height to water depth H/d, the nonlinearity of solitary waves becomes stronger and stronger. Compared with the original Morison equation, the modified Morison equation considering nonlinear effects can predict the interaction between solitary waves and cylindrical piles more accurately. When applying the modified Morison equation to predict solitary wave load, the values of wave force parameters CD and CM are uniquely determined by H/d, and have nothing to do with the absolute values of wave height H, water depth d and cylindrical pile diameter D; Based on the results of several simulation experiments, the values of CD and CM in the range of 0.15≤H/d≤0.65 are given, which can provide reference for the rapid calculation of solitary wave load.

Key words： bridge engineering solitary wave impact hydrodynamic coefficient Morison equation single cylinder pier

Received: 25 May 2022 Published: 28 July 2023

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	Articles by authors
	LU Shenglong
	ZHU Jin
	JIANG Shangjun
	KANG Rui
	LI Yongle

Cite this article:

LU Shenglong,ZHU Jin,JIANG Shangjun, et al. Calculation method of the wave force on a single cylinder pile induced by solitary waves[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(14): 11-19.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I14/11

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