本文關(guān)鍵詞：立式儲液罐地震響應(yīng)數(shù)值分析及基礎(chǔ)隔震研究　出處：《華中科技大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 立式儲液罐 隔震參數(shù) 地震響應(yīng) 流固耦合 液體晃動 罐底提離

【摘要】：隨著社會經(jīng)濟(jì)的發(fā)展，儲液罐在石油、化工企業(yè)的運用越來越廣泛。立式儲液罐的破壞不僅可能造成石油、化工企業(yè)的直接損失，還會造成范圍更大、強度更大的次生災(zāi)害，因此儲罐的防震抗震得到了很多學(xué)者的高度重視。對于立式鋼制錨固儲液罐而言，很多學(xué)者都在借助一維簡化的彈簧質(zhì)量塊Haroun-Housner模型來研究地震的線性響應(yīng)。其主要有兩個方面的不足：第一，此簡化模型過于簡單，無法真實地反應(yīng)儲罐局部結(jié)構(gòu)的響應(yīng)；第二，此模型只能從結(jié)構(gòu)線性總響應(yīng)角度來評價儲罐的抗震性能，并不能考慮到幾何及材料非線性效應(yīng)和變厚度的罐壁等因素。對于立式鋼制非錨固儲液罐而言，，還沒有一個簡單有效的模型來真實地模擬流-固耦合、幾何大變形、液面大幅度晃動、材料非線性和狀態(tài)非線性等多種非線性因素作用下的儲罐地震反應(yīng)分析問題�；诖�，本文借助大型通用有限元ANSYS軟件，考慮流固耦合、幾何大變形、液面大幅度晃動、材料非線性、狀態(tài)非線性以及罐壁變厚度等因素，建立了儲罐有限元分析模型，對常見的立式圓柱形鋼制儲液罐在水平地震作用下進(jìn)行了隔震前后的數(shù)值計算與分析。主要完成的工作如下： 1．系統(tǒng)地探討在Ⅲ類場地9度區(qū)下，隔震層參數(shù)對不同高徑比立式鋼制錨固儲液罐地震響應(yīng)的影響規(guī)律。 2．系統(tǒng)地探討了在Ⅲ類場地9度區(qū)下1000立方米的儲液罐在不同儲液高度下，隔震層參數(shù)對立式鋼制錨固儲液罐地震響應(yīng)的影響規(guī)律。 3．據(jù)前面的規(guī)律來選取最優(yōu)隔震參數(shù)，來對1000立方米的立式鋼制錨固儲液罐在Ⅲ類場地9度區(qū)下進(jìn)行隔震前后震害分析并進(jìn)行對比。 4．對經(jīng)典的Clough立式鋼制非錨固儲液罐（Clough矮罐）建立基于考慮液體晃動及罐底提離的立式儲液罐非線性ANSYS有限元模型，并在水平地震作用下進(jìn)行罐底提離機理探討以及罐壁“象足”變形仿真分析，且運用基底隔震技術(shù)來分析儲罐地震響應(yīng)變化規(guī)律。
[Abstract]:With the development of social economy, the application of liquid storage tanks in petroleum and chemical enterprises is more and more extensive. The destruction of vertical storage tanks may not only cause direct losses of petroleum and chemical enterprises, but also cause a larger scope. Because of the higher intensity of secondary disasters, many scholars attach great importance to the earthquake resistance of storage tanks. For vertical steel Anchorage storage tanks. Many scholars are using one-dimensional simplified spring mass block Haroun-Housner model to study the linear response of earthquake. There are two main shortcomings: first, the simplified model is too simple. The response of the local structure of the tank can not be truly reflected; Secondly, the model can only evaluate the seismic performance of the storage tank from the view of the total linear response of the structure. The geometric and material nonlinearity and the variable thickness of tank wall can not be taken into account. There is no simple and effective model to simulate the fluid-solid coupling for the vertical steel non-Anchorage liquid storage tank. The seismic response analysis of the storage tank under the action of many nonlinear factors, such as large geometric deformation, large sloshing of liquid surface, material nonlinearity and state nonlinearity, is based on this. In this paper, the factors of fluid-solid coupling, geometric deformation, liquid level sloshing, material nonlinearity, state nonlinearity and tank wall thickness are considered with the aid of large scale finite element ANSYS software. The finite element analysis model of storage tank is established, and the numerical calculation and analysis of common vertical cylindrical steel storage tank before and after seismic isolation are carried out. The main work is as follows: 1. The influence of isolation layer parameters on the seismic response of vertical steel Anchorage liquid storage tanks with different height-diameter ratio is systematically discussed in the 9 degree zone of type 鈪

本文編號：1426515