化工装置区爆炸冲击波传递影响研究

发布时间：2018-05-01 14:15

本文选题：化工装置 + 爆炸　；参考：《哈尔滨理工大学》2014年硕士论文

【摘要】：化工产业的飞速发展，加速了我国经济的快速增长，但是伴随化工生产引发的爆炸事故问题也成为了人们关注的重点，一旦发生事故，便会引起重大的人身伤亡及财产损失。因此，研究化工装置区在爆炸冲击波作用下的响应对于解决化工装置的安全防护问题具有极大的实际意义和理论价值。为了解决化工装置复杂系统爆炸的影响，本文应用大型非线性显示动力分析软件ANSYS/LS-DYNA针对化工装置区在爆炸荷载作用下的响应问题进行了以下几个方面的数值模拟： 1．利用ANSYS建立有限元模型，模拟了无限空气域中无障碍物爆炸的冲击波传播，利用后处理软件LS-PREPOST分析了冲击波在空气中传播的超压变化，并将数值模拟结果与经验公式结果进行对比，通过分析比较，，得出数值模拟结果与经验公式计算结果基本吻合，由此可知数值模拟在爆炸仿真方面具有一定的可行性。 2．当无限空气域中设置刚性障碍物时，本文对爆炸冲击波传播情况进行了数值模拟，并分析冲击波经过障碍物时的传播规律和前后超压变化。 3．以一特定化工装置区为例，研究了冲击波在受压装置周围区域的传播情况，详细分析了爆炸冲击波在装置区周围的等效应力分布情况及受压装置前后的冲量变化情况。本文通过数值模拟化工装置周围区域的超压及冲量变化情况，分析不同仿真得到的超压数据，得到受压装置受到冲击波损坏最严重的部位，为工业爆炸中化工装置的安全防护提供了理论基础和借鉴。
[Abstract]:The rapid development of chemical industry accelerates the rapid economic growth of our country, but the explosion accident caused by chemical production has also become the focus of attention. Once the accident occurs, it will cause serious casualties and property losses. Therefore, it is of great practical significance and theoretical value to study the response of chemical plant area under the action of blast wave for solving the problem of safety protection of chemical plant. In order to solve the effect of explosion in complex system of chemical plant, this paper applies large-scale nonlinear display dynamic analysis software ANSYS/LS-DYNA to simulate the response of chemical plant area under explosion load in the following aspects: 1. The finite element model of ANSYS is used to simulate the propagation of shock wave in an unobstructed explosion in the infinite air domain. The overpressure variation of shock wave propagation in the air is analyzed by the post-processing software LS-PREPOST. By comparing the results of numerical simulation and empirical formula, it is concluded that the results of numerical simulation are in good agreement with those of empirical formula, which shows that numerical simulation is feasible in explosive simulation. 2. When rigid obstacles are set up in the infinite air domain, the propagation of blast wave is numerically simulated, and the propagation law of shock wave passing through the obstacle and the change of overpressure before and after are analyzed. 3. Taking a specific chemical plant as an example, the propagation of shock wave in the area around the compression device is studied. The distribution of equivalent stress around the area of the explosive shock wave and the variation of impulse before and after the compression device are analyzed in detail. In this paper, the overpressure and impulse change around the chemical plant are simulated numerically, and the overpressure data obtained from different simulation are analyzed, and the most seriously damaged parts of the pressured device are obtained. It provides a theoretical basis and reference for the safety protection of chemical plant in industrial explosion.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TQ086.1

【引证文献】