Simulation on Response Characteristics of Prefabricated Orifice Frame Structures under Blast Loads

GONG Xiaokang; WANG Xing; CHEN Jun; JIANG Wenjian; LIU Jie

doi:10.7643/ issn.1672-9242.2025.12.002

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Equipment Environmental Engineering ›› 2025, Vol. 22 ›› Issue (12) : 8-15. DOI: 10.7643/ issn.1672-9242.2025.12.002

Weapons Equipment

Simulation on Response Characteristics of Prefabricated Orifice Frame Structures under Blast Loads

GONG Xiaokang, WANG Xing, CHEN Jun, JIANG Wenjian, LIU Jie

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Abstract

The work aims to study the damage characteristics of plate frame structures with preexisting hole defects under blast loads, to provide references for the structural design of equipment such as ships. With a typical plate frame structure as the research object, a numerical simulation was carried out to the dynamic response of the prefabricated orifice frame structure under blast loads. The effects of the length-to-diameter ratio of the warhead, the explosive equivalent, and the proportional distance on the damage mode and the residual hole diameter of the prefabricated orifice frame structure were analyzed. Under the same explosive equivalent and the same positive penetration blast distance, when the length-to-diameter ratio of the cylindrical charge was within the range of 1:4 to 4:1, the smaller the length of the explosive, the greater the damage degree to the prefabricated orifice frame structure. The damage modes of the prefabricated orifice frame structure under blast loads were divided into three levels. When the length-to-diameter ratios were 1:1 and 3:1, the critical proportional distances for causing damage mode I (only the bottom plate bulges backward) and damage mode II (the bottom plate tears into petal shapes) of the prefabricated orifice frame structure were 0.44 and 0.2, respectively. The critical proportional distances for causing damage mode II and damage mode III (the bottom plate tears along the bone material boundary) were 0.33 and 0.17, respectively. These study findings provide references for the structural design of equipment such as ships.

Key words

blast load / plate frame structure / prefabrication defect / damage law / numerical simulation / damage mode

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GONG Xiaokang, WANG Xing, CHEN Jun, JIANG Wenjian, LIU Jie. Simulation on Response Characteristics of Prefabricated Orifice Frame Structures under Blast Loads[J]. Equipment Environmental Engineering. 2025, 22(12): 8-15 https://doi.org/10.7643/ issn.1672-9242.2025.12.002

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