Dynamic Characteristics Analysis and Mooring System Optimization of Wreck Salvage in Off-Bottom Stage Based on Seabed Resistance Force Time History

doi:10.16183/j.cnki.jsjtu.2023.S1.16

Abstract

Abstract:

In this paper, a method for analyzing the dynamic characteristics of the sunken ship salvage system based on the accurate time history of the seabed resistance force is proposed. The simulation of a typical case preliminarily clarifies the complex interaction mode between the mother ship (a barge), the mooring line, and the lifting line in the lifting stage. It is found that the motion of the mother ship, especially the surge motion, has significantly increased in this stage. In order to better control the motion of the mother ship in the salvage process, the mooring arrangement of the salvage system is also optimized in this paper, and the mooring line arrangement configuration with better motion control effect is obtained.

Key words: wreck salvage, water-soil interaction, time-domain simulation, coupling system

CLC Number:

P752

XIN Shangzhe, WANG Lei, FAN Jinyu, ZHOU Dongrong, CHEN Shihai, ZHU Xiaodong. Dynamic Characteristics Analysis and Mooring System Optimization of Wreck Salvage in Off-Bottom Stage Based on Seabed Resistance Force Time History[J]. Journal of Shanghai Jiao Tong University, 2023, 57(S1): 1-12.

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参数	驳船	沉船
长度/m	120	46
宽度/m	34	17
高度/m	9	6.67
初始吃水/m	3.75	-
水线面面积/m²	3 230.57	-
质量/t	6 000	9 500
水下质量/t	-	4 151.67

参数	系泊缆	提升缆
长度/m	800	-
数量	8	20
质量/(kg·m^-1)	273.95	26
刚度/GN	1.454	0.246
直径/m	0.12	0.078
最小断裂载荷/MN	6.786	3.5

序号	厚度/m	密度/(t·m^-3)	泊松比	孔隙比	S_a/%	φ/(°)	C_y/kPa	C_f	C_p/(cm·s^-1)
①	1.04	1.949	0.25	0.743	93	30	7	0.577	5.56×10^-7
④	17.85	1.724	0.42	1.364	98	11.5	12	0.203	1.58×10^-5
⑤1	8.4	1.765	0.42	1.225	96	13	17	0.231	8.79×10^-6
⑤3	22.71	1.898	0.35	0.894	96	18	20	0.325	1.56×10^-6

参数	起始值	极值	终末值
驳船平均吃水/m	3.76	5.13	5.01
提升缆长度/m	25.24	17.19	17.31
沉船垂直位置/m	-23.24	-16.66	-16.66
总提升张力/kN	0	44 345.18	40 686.30