基于FLACS的地下暗厨房燃气爆炸数值模拟
Numerical simulation of gas explosion in underground unventilated kitchen based on FLACS
彭善碧 1李薇 1唐平2
作者信息
- 1. 西南石油大学 土木工程与测绘学院,四川 成都 610500
- 2. 中国石油西南油气田公司 集输工程技术研究所,四川 成都 610095
- 折叠
摘要
为更好地按抗爆要求设计地下暗厨房,利用FLACS软件建立含地下暗厨房的某民用建筑有限元模型,研究气云尺寸、点火位置、障碍物的形状以及位置和尺寸对燃气爆炸压力的影响,并根据数值模拟结果确定爆炸对暗厨房结构的损伤程度.研究表明:在暗厨房中,随着气云尺寸增大,爆炸对建筑物损坏程度也加大.点火位置在厨房、通风井和客厅时,压力峰值分别为 41.9、19.5 和3.25 kPa.障碍物的存在会使爆炸产生更大的压力,障碍物截面形状为正方形时的压力峰值远大于圆形和长方形;障碍物越靠近点火位置,压力峰值越大;随着障碍物截面尺寸增加,压力峰值不断升高,电梯区域附近压力峰值上升幅度最大.地下暗厨房燃气爆炸产生的冲击波对地上空间影响大于传统厨房.
Abstract
In order to optimize the anti-explosion design of an underground unventilated kitchen,the finite element model of a house with an underground unventilated kitchen was established in FLACS software.Based on this model,the effect of gas cloud size,ignition position,shape of obstacle,position,and size of obstacle on gas explosion pressure was investigated.The extent of explosion damage to the unventilated kitchen structure was obtained according to simulation results.The results show that when the gas cloud size increases in the unventilated kitchen,the explosion damage to the building is more severe.The maximum pressure peak values are 41.9,19.5,and 3.25 kPa when ignition is in the kitchen,ventilation shaft,and living room.When an obstacle exists,a greater amount of pressure is generated.The peak pressure is much higher when the obstacle cross-section shape is square than when it is circular and rectangular.The closer the obstacle is to the ignition position,the more intense the pressure peak.With the increase in the obstacle section size,the peak pressure increases continuously.The greatest rise in peak pressure is near the elevator.Shock waves from gas explosions in unventilated kitchens have a greater impact on the floor space than in traditional kitchens.
关键词
FLACS/地下暗厨房/燃气爆炸/数值模拟/压力峰值/点火位置/障碍物Key words
FLACS/underground unventilated kitchen/gas explosion/numerical simulation/peak pressure/ignition position/obstacles引用本文复制引用
基金项目
四川省自然科学基金(2023NSFSC0422)
出版年
2024
NETL
NSTL
万方数据