A Three-Parameter Semi-Quantitative Risk Assessment Method for Off-Bottom Stage in Wreck Salvage

doi:10.16183/j.cnki.jsjtu.2023.S1.17

Abstract

Abstract:

Based on the time domain simulation of the dynamic response of the wreck salvage system in the off-bottom stage, this paper proposes a semi-quantitative safety assessment method for this process, aiming to summarize all motion modes of the salvaging mother ship and provide overall safety assessment scores of the wreck salvage system under different sea conditions. Based on the “Changjiang Kou 2” project, the sensitivity analysis of the system dynamic response under different wave direction angles is conducted. It is concluded that the two wave direction intervals (150°, 210°) and (330°, 30°) are relatively ideal salvage operation windows.

Key words: wreck salvage, time-domain simulation, risk assessment method

CLC Number:

P752

XIN Shangzhe, WANG Lei, PAN Jie, ZHOU Dongrong, CHEN Shihai, ZHU Xiaodong. A Three-Parameter Semi-Quantitative Risk Assessment Method for Off-Bottom Stage in Wreck Salvage[J]. Journal of Shanghai Jiao Tong University, 2023, 57(S1): 13-19.

Figures/Tables 6

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References 7

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案例	分类	标准	状态	分数
驳船运动或缆张力的随时间的变化	安全性评估	P2阶段的R和M均小于P1和P3阶段	安全	1
		P2阶段的R或M大于P1和P3阶段平均值,但不是整个模拟过程的最大值	相对不安全	2
		P2阶段的R或M是整个模拟过程的最大值	不安全	3
	稳定性评估	P2阶段的C_v小于P1和P3阶段	稳定	1
		P2阶段的C_v大于P1和P3阶段平均值,但不是整个模拟过程的最大值	相对不稳定	2
		C_v的最大值出现在P2阶段	不稳定	3

D_w/(°)	运动	安全性得分	稳定性得分	组内得分	组间得分	S_DOF	S_T
90	纵荡	1	3	23	1	4	103
	横荡	3	3		7	42
	垂荡	3	1		7	28
	横摇	2	1		7	21
	纵摇	1	1		1	2
	首摇	1	3		1.5	6
105	纵荡	3	3	31	3.5	21	162
	横荡	3	3		6	36
	垂荡	3	3		4.5	27
	横摇	3	1		6	24
	纵摇	3	3		6	36
	首摇	2	1		6	18
120	纵荡	3	3	28	4.5	27	151
	横荡	2	3		5	25
	垂荡	3	1		4	16
	横摇	3	1		5	20
	纵摇	3	3		7	42
	首摇	2	1		7	21
135	纵荡	3	3	29	2.5	15	121
	横荡	2	3		4	20
	垂荡	3	1		5.5	22
	横摇	3	3		4	24
	纵摇	3	1		5	20
	首摇	2	2		5	20
150	纵荡	3	3	33	3.5	21	117
	横荡	3	3		3	18
	垂荡	3	1		4	16
	横摇	3	3		3	18
	纵摇	3	3		4	24
	首摇	2	3		4	20
165	纵荡	3	3	31	6	36	90
	横荡	3	3		2	12
	垂荡	3	1		1.5	6
	横摇	3	3		2	12
	纵摇	3	3		2.5	15
	首摇	2	1		3	9
180	纵荡	3	3	24	7	42	72
	横荡	1	3		1	4
	垂荡	3	1		1.5	6
	横摇	1	1		1	2
	纵摇	3	3		2.5	15
	首摇	1	1		1.5	3

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