【摘要】：針對內(nèi)孤立波對潛體的載荷作用,分析受力特性并建立合適的載荷計算方法.基于文獻(xiàn)資料,選取mKdV(modified KdV)理論,建立兩層流體中考慮浮力變化的內(nèi)孤立波對順流向放置潛體的垂向力及力矩的計算方法,使用Matlab編制計算程序.利用已有文獻(xiàn)試驗結(jié)果對本文計算結(jié)果的可靠性進(jìn)行驗證,分析潛體所受垂向力及力矩在內(nèi)波流場中不同位置處的時歷變化.結(jié)果表明,下凹型內(nèi)孤立波在上層流體中對潛體的垂向力及力矩大于在下層流體中對潛體的垂向力及力矩.垂向力在波谷前、后位置方向相反,具有垂向上、下剪切特性,在穿越過程中會對潛體產(chǎn)生強大的垂向力矩,尤其是在內(nèi)界面與波面之間的流體層中,密度變化導(dǎo)致潛體產(chǎn)生浮力差.潛體所受的總垂向作用力及力矩遠(yuǎn)大于內(nèi)孤立波本身對潛體的垂向作用力及力矩,分層流體中浮力的變化對潛體的影響至關(guān)重要.
[Abstract]:In view of the load effect of internal solitary wave on submersible body, the stress characteristics are analyzed and a suitable load calculation method is established. Based on the literature and mKdV (modified KdV) theory, the method of calculating vertical force and moment of internal solitary wave in two-layer fluid with consideration of buoyancy variation is established. The calculation program is compiled by Matlab. The reliability of the calculated results is verified by the experimental results in the literature, and the time-history changes at different positions in the internal wave flow field of the vertical force and moment of the submersible are analyzed. The results show that the vertical force and torque of the concave internal solitary wave to the submersible body in the upper fluid is larger than that of the submersible body in the lower fluid. In front of the trough, the vertical force is in the opposite direction at the back, and it has the characteristics of vertical and downward shear, which will produce a strong vertical torque on the submersible during the passage, especially in the fluid layer between the inner interface and the wave surface. The change of density results in poor buoyancy of the submersible. The total vertical force and torque of submersible body is much larger than that of internal solitary wave itself. The effect of buoyancy in stratified fluid on submersible body is very important.
【作者單位】： 中國海洋大學(xué)工程學(xué)院;海洋石油工程股份有限公司;
【基金】：國家自然科學(xué)基金資助項目(51279187)
【分類號】：P75;P731.2

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本文編號：2196665