Envelope Features of Response Amplitude of Hanging Underwater Slender Bodies in Upper End Horizontal Periodical Motion

doi:10.16183/j.cnki.jsjtu.2019.225

Abstract

Abstract:

To improve the safety and operating efficiency of underwater slender bodies, the hanging underwater slender body is divided into several micro segments for analysis. The equilibrium equations of each segment are listed according to the mechanical equilibrium and deformation coordination conditions. Then, the equilibrium equations are solved with MATLAB programming. When the upper end moves horizontally and periodically, the upper end motion amplitude, upper end motion period, and lower end weight are changed separately to obtain the amplitude envelope of hanging underwater slender bodies. Based on the results of numerical calculations, the response envelope characteristics of hanging underwater slender bodies are analyzed. The maximum amplitude point on the amplitude envelope of the slender body is generally at the upper end. As the parameters change, it can be converted to the lower end. Changing the amplitude and period of upper end motion has a greater impact on the minimum amplitude point. The lower end weight has a small influence on the minimum amplitude point. By adjusting the ranges of these parameters, the positions of maximum amplitude point and minimum amplitude point on the amplitude envelope of slender body can be controlled.

Key words: slender body, motion response, flexible segment model, cable dynamics

CLC Number:

P716.2

CONG Shanxue, XU Xuesong. Envelope Features of Response Amplitude of Hanging Underwater Slender Bodies in Upper End Horizontal Periodical Motion[J]. Journal of Shanghai Jiao Tong University, 2021, 55(1): 32-39.

Figures/Tables 6

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References 10

[1]	赵俊海，张美荣，王帅，等. ROV中继器的应用研究及发展趋势[J]. 中国造船，2014, 55(3): 222-232.
	ZHAO Junhai, ZHANG Meirong, WANG Shuai, et al. Application and development trend of tether management system (TMS) for ROV[J]. Shipbuilding of China, 2014, 55(3): 222-232.
[2]	龚铭煊，刘再生，段梦兰，等. 深海水下采油树下放安装过程分析与研究[J]. 石油机械，2013, 41(4): 50-54.
	GONG Mingxuan, LIU Zaisheng, DUAN Menglan, et al. Research on the running installment process of deep sea underwater Christmas tree[J]. China Petroleum Machinery, 2013, 41(4): 50-54.
[3]	HUSE E L. Interaction in deep-sea riser arrays[C]∥Offshore Technology Conference. Houston, Texas, USA: Offshore Technology Conference, 1993: 1-10.
[4]	HUSE E L. Experimental investigation of deep sea riser interaction[C]∥Offshore Technology Conference. Houston, Texas, USA: Offshore Technology Conference, 1996: 1-6.
[5]	崔洋洋. 串列布设立管干涉问题流固耦合研究[D]. 大连：大连理工大学，2013.
	CUI Yangyang. Fluid-structure interaction research of interference of tandem arranged risers[D]. Dalian: Dalian University of Technology, 2013.
[6]	李红艳，朱仁庆. 串列双立管涡激振动抑制研究[J]. 舰船科学技术，2016, 38(17): 54-59.
	LI Hongyan, ZHU Renqing. Research on VIV suppression of intandem double risers[J]. Ship Science and Technology, 2016, 38(17): 54-59.
[7]	吴天昊，付世晓，张智奇，等. 平台运动下悬垂立管动力响应及疲劳损伤特性试验研究[J]. 海洋工程，2018, 36(3): 18-25.
	WU Tianhao, FU Shixiao, ZHANG Zhiqi, et al. Experimental investigation of dynamic response and fatigue damage characteristics of free-hang risers under vessel motion[J]. The Ocean Engineering, 2018, 36(3): 18-25.
[8]	吴天昊，付世晓，任桐鑫，等. 平台运动与管内流动联合作用下悬垂立管动力响应特性研究[J]. 振动与冲击，2018, 37(17): 32-40.
	WU Tianhao, FU Shixiao, REN Tongxin, et al. Dynamic responses of water intake risers under interaction between vessel motion and internal flow[J]. Journal of Vibration and Shock, 2018, 37(17): 32-40.
[9]	XU X S, ZOU Z J. Robust dynamics calculation for underwater moving slender bodies via flexible segment model based optimization[J]. Ocean Engineering, 2015, 108: 493-503.
[10]	XU X S, YAO B H, REN P. Dynamics calculation for underwater moving slender bodies based on flexible segment model[J]. Ocean Engineering, 2013, 57: 111-127.

参数	数值
L/m	6.5
D/mm	22.5
S/mm²	397
E/MPa	3.489
T_c/s	87