危险货物集装箱温度场的数值模拟

发布时间：2018-04-30 22:38

  本文选题：危险货物集装箱 + 有限元法　； 参考：《兰州交通大学》2015年硕士论文

【摘要】：伴随着我国铁路经济建设的快速发展,危险货物的运输已经广泛渗入到实际生产应用的各个领域。基于我国地域辽阔,铁路路网分布覆盖面广,尤其是内地危险品的运输,大多数最适宜采用铁路集装箱进行运输。因此,大力推广铁路集装箱运输的发展已成为解决内地危险品运输的有效途径。此外,危险品的种类和数量伴随着我国化工产业的不断发展,呈现大幅度上升,这也对我国铁路集装箱运输危险品提出了更高、更新的要求。如何即能提高铁路集装箱运输危险货物的效率,又能保证其运输的安全性,已成为亟需解决的问题。只有形成贯穿南北、覆盖面更广的铁路集装箱运输系统,才能更好的适应和满足社会实际生产对危险品运输的需求。本文围绕着危险货物进箱条件进行了如下方面的研究:首先,对危险货物进箱条件的影响因素进行了研究,得出温度、湿度以及货物的包装情况是影响危险货物采用集装箱进行运输的主要因素,其中温度的影响最为重大。以九大类危险货物为研究对象,对它们各自的物理化学特性加以理论分析,联系铁路实际运输情况对它们的进箱条件加以确定。其次,温度是影响危险货物采用集装箱进行运输的最主要因素,所以开展对集装箱在运输途中内外温度的研究很有必要。引入有限元法,了解有限元法的基本求解分析过程,并对集装箱温度场瞬态热分析的基本原理和分析过程加以研究,对所施加的初始条件、边界条件以及热载荷进行分析,为后文建立的集装箱有限元模型奠定良好的基础。最后,在对危险货物集装箱传热数值分析时,应用ANSYS 15.0软件,建立集装箱及货物的有限元传热模型,施加相关的边界条件并进行求解,对所布置观测点的温度变化情况进行详细分析。最终通过模拟仿真得出,集装箱内部所能达到的最高温度为70℃左右;箱内货物所能达到的最高温度为37℃左右;箱顶内表面最高温度为70.3℃高于外表面最高温度64.7℃;越靠近集装箱箱壁的货物温度越高,所能达到的最高温度为36.7℃;不同层次货物的温度变化情况也不相同,第一层货物的温度明显高于其它层次货物的温度。这些都为危险货物采用集装箱运输提供一定的参考依据。
[Abstract]:With the rapid development of railway economic construction in China, the transportation of dangerous goods has been widely infiltrated into various fields of practical production and application. Because of our vast territory and wide distribution of railway network, especially the transportation of dangerous goods in the interior, most of the railway containers are most suitable for transportation. Therefore, promoting the development of railway container transportation has become an effective way to solve the inland dangerous goods transportation. In addition, the category and quantity of dangerous goods along with the continuous development of the chemical industry in China, showing a large increase, which also put forward a higher and newer requirements for China's railway container transportation of dangerous goods. How to improve the efficiency of railway container transportation of dangerous goods and ensure the safety of transport has become an urgent problem. Only by forming a railway container transportation system that runs through the north and south and has a wider coverage, can we better adapt and meet the demand for dangerous goods transportation in the actual production of society. This paper has carried on the following research around the dangerous goods incoming condition: first, has carried on the research to the dangerous goods incoming condition influence factor, obtained the temperature, Humidity and packaging are the main factors that affect the transport of dangerous goods in containers, among which temperature is the most important. Taking nine kinds of dangerous goods as the research object, the physical and chemical characteristics of each of them are analyzed theoretically, and their loading conditions are determined according to the actual railway transportation conditions. Secondly, temperature is the most important factor affecting the container transportation of dangerous goods, so it is necessary to study the temperature inside and outside the container during transportation. This paper introduces the finite element method to understand the basic solution and analysis process of the finite element method, and studies the basic principle and analysis process of the transient thermal analysis of the container temperature field, and analyzes the initial conditions, boundary conditions and thermal loads applied. It lays a good foundation for the container finite element model established later. Finally, in the numerical analysis of heat transfer of dangerous goods container, the finite element heat transfer model of container and cargo is established by using ANSYS 15.0 software, and the relevant boundary conditions are applied and solved. The temperature variation of the observation points is analyzed in detail. Finally, through simulation, the maximum temperature of container is about 70 鈩，

本文编号：1826579