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http://dx.doi.org/10.7734/COSEIK.2015.28.2.197

Dynamic Response of Plate Structure Subject to the Characteristics of Explosion Load Profiles - Part B: Analysis for the Effect of Explosion Loading Time According to the Natural Period for Target Structures -  

Kang, Ki-Yeob (Department of Naval Architecture and Ocean Engineering, Pusan National University)
Choi, Kwang-Ho (Department of Naval Architecture and Ocean Engineering, Pusan National University)
Ryu, YongHee (Central Research Institute, Samsung Heavy Industries Pangyo R&D Center)
Choi, JaeWoong (Central Research Institute, Samsung Heavy Industries Pangyo R&D Center)
Lee, Jae-Myung (Department of Naval Architecture and Ocean Engineering, Pusan National University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.28, no.2, 2015 , pp. 197-205 More about this Journal
Abstract
Offshore structures for the gas production are exposed to the risk of gas leaks, and gas explosions can result in fatal damages to the primary structures as well as secondary structures. To minimize the damage from the critical accidents, the study of the dynamic response of structural members subjected to blast loads must be conducted. Furthermore, structural dynamic analysis has to be performed considering relationships between the natural frequency of structural members and time duration of the explosion loading because the explosion pressure tends to increase and dissipate within an extremely short time. In this paper, the numerical model based on time history data were proposed considering the negative phase pressure in which considerable negative phase pressures were observed in CFD analyses of gas explosions. The undamped single degree of freedom(SDOF) model was used to characterize the dynamic response under the blast loading. A blast wall of FPSO topside was considered as an essential structure in which the wall prevents explosion pressures from the process area to utility and working areas. From linear/nonlinear transient analyses using LS-DYNA, it was observed that dynamic responses of structures were influenced by significantly the negative time duration.
Keywords
gas explosion loading profile; dynamic response; natural frequency; offshore structure; normalized displacement; negative pressure phase;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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