基于TNT当量法的木粉爆炸超压及致灾距离研究  

Study on Overpressure and Disaster Distance of Wood Dust Explosion Based on TNT Equivalent Method

作　　者：张浩楠 原琪 苑春苗[1] 李刚[1] ZHANG Hao-nan;YUAN Qi;YUAN Chun-miao;LI Gang(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报(自然科学版)》2025年第1期119-126,共8页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(52274180).

摘　　要：为快速评估木粉爆炸超压及致灾距离,采用TNT当量法预测木粉爆炸超压值.利用ANSYS/LSDYNA对木粉最大爆炸压力进行模拟.结果表明:当初始压力为0 MPa、粉尘质量浓度为750 g/m^(3)时,模拟值与实验值误差在10%以内;当初始压力为0.101 MPa、粉尘质量浓度为730 g/m^(3)时,计算值与实验值误差为2.44%,模拟值与实验值误差在7%以内,与计算值误差在8%以内,证明TNT当量法预测木粉爆炸超压在有/无标准大气压下均适用.根据TNT当量法估算建筑内粉尘爆炸超压分布结果,得到了人员伤亡、建筑损毁阈值,研究结果为木粉爆炸危险场所安全距离确定等防灾减灾措施提供参考依据.To quickly assess the overpressure and disaster distance of wood dust explosion,the TNT equivalent method was used to predict the overpressure value of wood dust explosion.The explosion pressure maximum of wood dust was simulated using ANSYS/LS-DYNA.The experimental results show that when the initial pressure is 0 MPa and the dust concentration is 750 g/m^(3),the error between simulated values and experimental values is within 10%;When the initial pressure is 0.101 MPa and the dust concentration is 730 g/m^(3),the error between the calculated value and the experimental value is 2.44%,the error between the simulated value and the experimental value is within 7%,and the error between the simulated value and the calculated value is within 8%.It proves that the TNT equivalent method is applicable for predicting the overpressure of wood dust explosion with or without standard atmospheric pressure.Based on the TNT equivalent method,the distribution of dust explosion overpressure in buildings was estimated,and the thresholds for casualties and building damage were analyzed.The research conclusion provides a reference basis for disaster prevention and mitigation measures such as the safe distance determination of hazardous areas for wood dust explosion.

关 键 词：TNT当量法 爆炸超压 木粉尘 ANSYS/LS-DYNA 安全距离 

分 类 号：X932[环境科学与工程—安全科学]