scholarly journals Structural response and optimization of airtight blast door under gas explosion load

2017 ◽  
Vol 19 (5) ◽  
pp. 3629-3647 ◽  
Author(s):  
Haitao Li ◽  
Xiaokun Chen ◽  
Qiuhong Wang ◽  
Jiezhuoma La ◽  
Jun Deng
Keyword(s):  
Structural Response ◽  
Gas Explosion ◽  
Explosion Load

scholarly journals A Novel Design of Rescue Capsule considering the Pressure Characteristics and Thermal Dynamic Response with Thermomechanical Coupling Action Subjected to Gas Explosion Load

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Xiaowei Zhai ◽  
Shibo Wu ◽  
Kai Wang ◽  
Xiaokun Chen ◽  
Haitao Li
Keyword(s):  
Dynamic Response ◽  
Coal Mine ◽  
Coupling Effect ◽  
Design Method ◽  
Thermomechanical Coupling ◽  
Structural Safety ◽  
Coupling Mechanism ◽  
Gas Explosion ◽  
Explosion Load ◽  
Mine Rescue

To ensure the structural safety and reliability of coal mine rescue capsule in disastrous surroundings after gas explosion, in this paper, the thermomechanical coupling effect on a certain structure subjected to gas explosion was analyzed, and then a novel rescue capsule with a combination of radius and square features was designed according to the underground surroundings and relevant regulations on mine rescue devices. Foremost, the coupling mechanism of thermal-fluid-solid interaction between gas explosion shock wave and rescue capsule and the thermal dynamic response of the capsule subjected to explosion load of gas/air mixture was investigated and revealed by employing LS-DYNA. The variation laws and characteristics of stress field, displacement field, and temperature field of the capsule were analyzed based on the simulation results. Results show that the structural safety, tightness, and reliability of the capsule meet the requirements of the national safety regulations. The design method presented in this work provides a new thought for design of coal mine rescue capsule.

Solution of Gas Explosion Load and Simulation of Dynamic Response of Multilayer Structures

2012 ◽  
Vol 557-559 ◽  
pp. 2401-2405
Author(s):  
Hua Dong Liu ◽  
Wei Qiang Wang
Keyword(s):  
Dynamic Response ◽  
Multilayer Structure ◽  
Radial Direction ◽  
Burst Pressure ◽  
Multilayer Structures ◽  
Gas Explosion ◽  
Explosion Pressure ◽  
Structure Strength ◽  
Explosion Load ◽  
Chemical Explosion

Chemical explosion may occur in urea reactor. The explosion load and the dynamic response of the multilayer structure are analyzed. Based on Russel model, the maximum explosion loads were calculated by thermodynamic methods. Dynamic response was simulated by Ls-dyna software. The result shows that the explosion pressure is smaller than the burst pressure; the stress distribution along the radial direction and the effective stress history are obtained and they both show some new features. The results may offer some reference significance for similar structure strength design and safe protection.

Analysis of the RC Slab under Gas Explosion Load

2010 ◽  
Vol 163-167 ◽  
pp. 1080-1084
Author(s):  
Yong Li Han ◽  
Long Zhu Chen
Keyword(s):  
Boundary Condition ◽  
Influence Factor ◽  
Reinforcement Ratio ◽  
Gas Explosion ◽  
Protective Measures ◽  
Analysis Methods ◽  
Explosion Overpressure ◽  
Calculation Results ◽  
Rc Slab ◽  
Explosion Load

In order to put forward protective measures and reduce the hazards caused by gas explosion events, it is significantly important to analyze the antiblast properties of the slab. According to the precast slab and poured slab that badly damaged in this two accidents, the antiblast ability of the slabs and explosion overpressure were analyzed. The overpressure differs little but the destruction differs much of the two accidents, so effects of some parameters on the the antiblast ability of the slab were calculated based on multigroup models. The results show that, boundary condition is the primary influence factor, the next is thickness, while the influence of reinforcement ratio is comparatively lower. Based on the calculation results, some protective measures were put forward. The analysis methods and conclusions can offer certain reference to the housing protection design and study.

scholarly journals Structural Response of Offshore Blast Walls under Accidental Explosion

2014 ◽  
Vol 1043 ◽  
pp. 278-282 ◽  
Author(s):  
Shaikh Atikur Rahman ◽  
Zubair Imam Syed ◽  
John V. Kurian ◽  
M.S. Liew
Keyword(s):  
Structural Response ◽  
Offshore Structures ◽  
Extensive Study ◽  
Design Guidelines ◽  
Critical Systems ◽  
Structural Behaviour ◽  
Single Degree Of Freedom ◽  
Structural Responses ◽  
Simplified Calculation ◽  
Explosion Load

Adequate blast resistant barriers are requisite to protect personnel and critical systems from the consequences of an accidental explosion and subsequent fire. Many of the blast walls currently installed in offshore structures were designed using simplified calculation approaches like Single Degree of Freedom models (SDOF) as recommended in many design guidelines. Over simplified and idealised explosion load used for response calculation and design of blast wall can lead to inadequate or overdesign of offshore blast walls. Due to lack of presence of a well-accepted design guidelines supported by extensive study, the protection provided by the conventional blast walls for offshore structures can be inadequate. In-depth understanding of structural response of blast walls under different blast loading can provide better design practice of blast walls for adequate protection. In this study, structural responses of conventional offshore blast walls were investigated. A computation fluid dynamics (CFD) approach was used to predict effect of different explosions on the barrier walls and non-linear finite elements analyses were performed to study the behaviour of the blast-loaded walls under different explosions. Effect of different parameters related to blast wall and accidental explosions were investigated to gain detail understanding of structural behaviour of typical steel blast wall.

Structural Safety Analyses for Offshore Platforms Under Explosion Loadings

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Yonghee Ryu ◽  
Bassam Burgan ◽  
Jaewoong Choi ◽  
Heesung Lee
Keyword(s):  
Structural Response ◽  
Time History ◽  
Structural Safety ◽  
Offshore Platforms ◽  
Structural Elements ◽  
Gas Explosion ◽  
Lagrangian Analysis ◽  
Safety Critical ◽  
Compression Waves ◽  
Explosion Risk

A gas explosion in an offshore platform may result in loss of life, pollution, and critical damage to facilities. Safety critical structural elements of these facilities have to be designed to withstand high explosion loads. The present study discusses methodologies for explosion risk assessment (ERA) of safety critical structural elements and introduces a coupled Eulerian–Lagrangian (CEL) method to improve the accuracy of the dynamic structural response under explosion loading. The design accidental load is defined by explosion risk analyses in terms of drag pressure, differential pressure, and overpressure. In current practice, an explosion pressure-time history is simplified into a triangular shape and uniformly applied to the surface of the impacted structures. This approach cannot account for the interaction between elastic waves (normally solved by the Lagrangian method) in the structure and compression waves (normally solved by the Eulerian method) in air. The CEL method which accounts for fluid–structure interaction has been experimentally validated and leads to more realistic predictions of the dynamic response of structures when compared to other analysis methods. The plastic strains derived from the CEL analysis can be approximately 50% lower than those predicted by Lagrangian analysis. Therefore, significant potential weight reduction can be achieved using the CEL method for gas explosion analysis.

Mechanical model of domestic gas explosion load

2008 ◽  
Vol 14 (6) ◽  
pp. 434-440 ◽  
Author(s):  
Yongli Han ◽  
Longzhu Chen
Keyword(s):  
Mechanical Model ◽  
Gas Explosion ◽  
Explosion Load
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