SF卧式双层油罐的液—固耦合地震动响应

发布时间：2018-06-24 16:57

本文选题：SF型 + 卧式　；参考：《兰州理工大学》2017年硕士论文

【摘要】：石油化工产业作为国民经济的重要支柱,在我国的经济发展中扮演着重要角色,它影响着国家安全、经济、军事、政治等各个方面,对于国家的发展和社会的进步起着至关重要的作用,而作为石油产业的基础设备,双层油罐的安全性能也日益受到人们的关注。目前,双层油罐作为石油的埋置式储存设备广泛应用于各大加油站,若油罐在地震中受损而导致石油泄漏,将会对环境和地下水资源造成极大地污染。因此对于双层油罐液-固耦合地震动响应的研究在工程实际中具有十分重要的意义。本文中以SF型双层油罐为研究对象,SF型双层油罐的内层采用钢制、而外罐采用玻璃纤维增强塑料(玻璃钢)制成,并针对双层油罐的复合结构,建立了SF双层油罐的分离式有限元模型,研究了SF双层油罐的液-固耦合地震动响应规律,具体如下:(1)考虑覆土压力和储液的静水压力作用,建立SF双层油罐的静力有限元模型,研究双层油罐罐壁的应力分布规律。结果表明:内层应力值远大于夹层和外层,由此可以看出,钢制内层为主要受力层,保证了整个油罐的结构强度。(2)为了研究SF双层油罐在不同地震作用下的液-固耦合地震动响应规律,将1.9m的覆土换算为外压,采用弹簧单元模型模拟土体,建立结构-弹簧单元计算模型,并利用El-Centro波和兰州波对该计算模型进行动力有限元分析。其计算结果表明:SF双层油罐在El-Centro波和兰州波的作用下表现出不同的地震动响应规律,但与El-Centro波相比,双层油罐在兰州波作用下动力响应较大。(3)分别取覆土厚度为2.9m、3.9m和4.9m,并沿油罐的Y向输入兰州波,以此研究覆土厚度对SF双层油罐液-固耦合地震动响应的影响。其计算结果表明:SF型卧式双层油罐的地震动响应与覆土厚度密切相关,覆土厚度越大,罐壁位移、有效应力、主应力也越大,但在同一覆土厚度下,罐壁钢制内层、夹层、外层却表现出不同的动力响应特点。
[Abstract]:As an important pillar of the national economy, the petrochemical industry plays an important role in the economic development of our country. It affects the national security, economy, military, political and other aspects, and plays a vital role in the development of the country and the progress of the society. As the basic equipment of the stone oil industry, the safety performance of the double layer oil tank is also a day. At present, double oil tank as buried storage equipment for oil is widely used in various gas stations. If oil tank is damaged in the earthquake, the oil leakage will cause great pollution to the environment and groundwater resources. It is of great significance. In this paper, the SF double layer oil tank is used as the research object. The inner layer of the SF double layer oil tank is made of steel, and the outer tank is made of glass fiber reinforced plastic (glass fiber reinforced plastic). In view of the composite structure of the double layer oil tank, a separate finite element model of the SF double layer oil tank is established, and the liquid solid coupling earthquake of the SF double layer oil tank is studied. The dynamic response law is as follows: (1) the static finite element model of SF double layer oil tank is established to study the stress distribution of the tank wall of a double layer oil tank. The results show that the inner stress of the inner layer is far greater than the interlayer and the outer layer. Thus, it can be seen that the steel inner layer is the main stress layer and ensures the whole oil tank. Structure strength. (2) in order to study the response law of SF double layer oil tank under different seismic action, the soil of 1.9m is converted into external pressure, the spring element model is used to simulate the soil, and the structure spring element calculation model is established, and the dynamic finite element analysis is carried out by using El-Centro wave and Lanzhou wave. The results show that the SF double layer oil tank shows different ground motion response laws under the action of El-Centro wave and Lanzhou wave, but compared with the El-Centro wave, the dynamic response of the double layer oil tank under the action of the Lanzhou wave is larger. (3) the thickness of the cladding soil is 2.9m, 3.9m and 4.9M, and the Y direction of the oil tank is input to the Lanzhou wave, in order to study the layer thickness of the SF double layer. The results show that the ground motion response of the SF horizontal double layer oil tank is closely related to the thickness of the soil, the greater the thickness of the overlying soil, the greater the displacement of the tank, the effective stress and the greater the main stress, but the inner layer, the interlayer and the outer layer of the steel tank wall exhibit different dynamic response characteristics under the same thickness of the soil.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE972

【参考文献】