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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
内孤立波对水平圆柱潜体作用力的计算
殷文明,郭海燕,吴凯锋,马东
1. 中国海洋大学 工程学院,山东 青岛 266100; 
2. 海洋石油工程股份有限公司,天津 300461
Calculation of internal solitary wave force on horizontal submerged circular cylinder
YIN Wen ming, GUO Hai yan, WU Kai feng, MA Dong
1. Department of Engineering, Ocean University of China, Qingdao 266100, China；
2. Offshore Oil Engineering Limited Company, Tianjin 300461, China
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摘要：

针对内孤立波对潜体的载荷作用,分析受力特性并建立合适的载荷计算方法.基于文献资料,选取mKdV（modified KdV）理论,建立两层流体中考虑浮力变化的内孤立波对顺流向放置潜体的垂向力及力矩的计算方法,使用Matlab编制计算程序.利用已有文献试验结果对本文计算结果的可靠性进行验证,分析潜体所受垂向力及力矩在内波流场中不同位置处的时历变化.结果表明,下凹型内孤立波在上层流体中对潜体的垂向力及力矩大于在下层流体中对潜体的垂向力及力矩.垂向力在波谷前、后位置方向相反,具有垂向上、下剪切特性,在穿越过程中会对潜体产生强大的垂向力矩,尤其是在内界面与波面之间的流体层中,密度变化导致潜体产生浮力差.潜体所受的总垂向作用力及力矩远大于内孤立波本身对潜体的垂向作用力及力矩,分层流体中浮力的变化对潜体的影响至关重要.
Abstract:

A proper load calculation method was established to analyze the characteristics of internal solitary wave loads on the submerged body. MKdV (modified KdV) theory was chosen considering the changes of buoyancy based on the literature data in order to establish the calculation method of the vertical forces and torques of internal solitary waves on the submerged body which is in line placed. The reliability of the calculation results was verified with the existing test data by means of programming with Matlab. Three different locations were considered where the submerged body to be placed: the upper layer, the middle layer and the lower layer. Then the time histories of the vertical forces and torques of the body in these different locations were analyzed. Results show that the vertical forces and torques caused by internal solitary wave in the lower layer are less than that in the upper layer. The vertical force is in opposite directions before and after the wave trough position, which shows vertical shear properties. The internal solitary wave can generate strong vertical torque on the submerged body in the process of crossing. Especially in the middle layer, density changes lead to the buoyancy difference and the total forces and torques are far greater than which were caused by internal solitary waves. The buoyancy change on the influence of the submerged body is fatal in the stratified two layer fluid.
出版日期: 2016-07-23
:  TV 131  
基金资助:

国家自然科学基金资助项目(51279187).
通讯作者: 郭海燕, 女, 教授, 博导. ORCID: 0000000233922234.     E-mail: hyguo@ouc.edu.cn
作者简介: 殷文明（1988-）,男, 博士生,从事内波流场数值模拟的研究. ORCID: 0000000204750939. E-mail:wmyinouc@163.com
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殷文明,郭海燕,吴凯锋,马东. 内孤立波对水平圆柱潜体作用力的计算[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.07.005.

YIN Wen ming, GUO Hai yan, WU Kai feng, MA Dong. Calculation of internal solitary wave force on horizontal submerged circular cylinder. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.07.005.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.07.005    或    http://www.zjujournals.com/eng/CN/Y2016/V50/I7/1252

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