Numerical Simulation Analysis Of Dynamic Responses Of The100,000Cubic Meter Liquid-storage Tank

As anenergy reserve, petroleum has profound influence on every field of theindustry production. Thus, research on the oil storage tank has important meaning asa oil storage structure. The100thousand cubic meter ambient pressure verticalfloating roof liquid-storage tank is the most widely used storage tank type in ourcountry. Significant response such as displacement and stress will be induced to t heoil storage tank under the action of earthquake. The destruction of the tank will beresulted in some serious siutation, leading to a series of direct and secondarydisasters. Research on the oil storage tank has a relative long history. And manyresearch achievements have been obtained. However, research on the tank structureinvolves many aspects like the thin-talled shell structure and fluid-solid coupling.The structure form is complicate to some extent. Also the shaking table test couldnot be conducted since that the similarity theorem can not be fully satified. As aresult, many results of the shaking table test could not completely reflect theresponse of the structure under actical working condition. Therefore, solution andformula for many research contents such as the long period sloshing wave heightcould not be presented. Development of the computer technology, especially thecomputer simulation technology, supplies a novel approach for research on the oilstorage tank. Methods combining the shaking table test and the numerical simulationhave become the main research method in this field. The affiliation of the numericalmethod makes the research more accurate.Based on the above description, combining with the three-dimension shakingtable test conducted by the Master Wu Ming of Harbin Institute of Technology andusing the ANSYS software, this thesis performed the following research work on thereduced size model tank and the full size tank in real project:1. Build the finite element (FE) model of the model tank which has the samesize with that of the three-dimension shaking table test using the ANSYS software,perform modal analysis, compare responses such as diaplacement and strain of theFE model and the shaking table test model under a work condition sample of theshaking table test (three-dimension El Centro seismic excitation with acceleration of0.2g), and completely verify the reliability of the FE model;2. Using the FE model of the model tank to research on two important aspects,response of the tank subjected to non-uniform settlement of different area form andthe sloshing wave height under the action of the long period earthquake wave,qualitatively give the corresponding distribution law;3. Following the model build idea mentioned in the prior part, build the FE model of the100thousand cubic meter liquid-storage tank with the real size,conduct the seismic simulation of the FE model of the full size tank subjected to theprecautionary earthquake represented by the0.2g El Centro record, the rareearthquake of the foreign geological condition represented by the0.4g El Centrorecord and the rare earthquake of the domestic geological condition represented bythe0.4g El Centro record of the8degree precautionary criterion, respectively,analyze the response of the tank, obtain the distribution law of each of the response.4. Using the FE model of the full size tank to detail investigate two importantaspects, response of the tank subjected to non-uniform settlement of different areaform and the sloshing wave height under the action of the long period earthquakewave, find out the wake part of the tank.