Structural Impact Dynamic Response Characteristics of Offshore Platform Blast Wall in High Temperature Environment

doi:10.16183/j.cnki.jsjtu.2019.249

Abstract

Abstract:

The blast wall is an important protection facility for offshore platforms, whose anti-explosion performance needs to be focused on. Based on the nonlinear finite element method, the structural dynamic response of the blast wall under the explosion at normal temperature was studied. The applicability of the quasi-static and dynamic algorithms was compared with the experimental data, and the structural impact deformation forms at room temperature were analyzed. Considering the effects of high temperature on materials and structures, the structural dynamic response characteristics of the blast wall were analyzed. The study shows that the high temperature has a significant aggravating effect on structural response. That is, given the load level, the maximum displacement can reach 5 times of that at normal temperature. Under the impact of normal temperature load, the structural strain is elastic with no permanent deformation or with small deformation, but it may aggravate to huge permanent deformation at a high temperature. The effect of high temperature will change the response pattern of the structure. This research can provide reference for the design of blast wall.

Key words: blast wall, high temperature, explosion, impact, structural dynamic response

CLC Number:

U663.6

WANG Rui, XUE Hongxiang, YUAN Yuchao, TANG Wenyong. Structural Impact Dynamic Response Characteristics of Offshore Platform Blast Wall in High Temperature Environment[J]. Journal of Shanghai Jiao Tong University, 2021, 55(8): 968-975.

Figures/Tables 13

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References 9

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材料名称	E/GPa	ρ/(kg·m^-3)	ν	σ_y/MPa	σ_b/MPa	Cowper-Symonds系数
材料名称	E/GPa	ρ/(kg·m^-3)	ν	σ_y/MPa	σ_b/MPa	C/s^-1	q
波纹板	200.0	7980	0.3	293.7	554.2	1522.0	5.13
角钢1	200.0	7980	0.3	283.3	560.0	2720.0	5.78
角钢2	200.0	7980	0.3	276.2	681.6	429.0	4.08
工字型钢	205.0	7980	0.3	235.0	523.4	40.4	5.00

p_max/MPa	x_max/mm	x_eve/mm	应变模式
0.06	20.6	0	弹性阶段,无永久应变
0.08	28.1	0
0.10	39.5	5.9	小应变阶段,微小局部屈曲
0.12	79.9	45.9
0.14	172.0	141.6
0.16	295.5	274.0	大应变阶段,对称局部屈曲
0.18	329.0	313.4
0.20	351.8	333.1
0.30	402.3	386.7
0.40	431.6	418.5
-0.06	19.9	0	弹性阶段,无永久应变
-0.08	27.4	0
-0.10	42.2	5.4	小应变阶段,微小局部屈曲
-0.12	1268.0	1255.0	大应变阶段,对称局部屈曲

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