| 引用本文: | 翟希梅,王皓淞,范峰.160 000 m3大型LNG储罐的振动特性分析[J].哈尔滨工业大学学报,2014,46(6):14.DOI:10.11918/j.issn.0367-6234.2014.06.003 |
| ZHAI Ximei,WANG Haosong,FAN Feng.Vibration characteristic analysis of 160 000 m3 LNG storage tank[J].Journal of Harbin Institute of Technology,2014,46(6):14.DOI:10.11918/j.issn.0367-6234.2014.06.003 |
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| 摘要: |
| 为了解160 000 m3大型液化天然气(LNG)全容式储罐的自振振动特性,采用ANSYS软件建立了储罐结构的精细化有限元模型,利用直接耦合法对液体单元和罐体结构进行流固耦合约束,采用缩减法进行储罐振动特性分析,获得了空罐、正常工作时满液位以及满液位泄露、半液位泄露四种工况下钢制内罐与预应力混凝土外罐的振动特点和振动周期;分析了液体与罐体相互作用时,液体对罐体结构振动特性的影响及其规律,以及预应力、罐内气压和底板约束数量对外罐结构振动特性的影响规律． |
| 关键词: LNG储罐 流固耦合 自振特性 有限元分析 |
| DOI：10.11918/j.issn.0367-6234.2014.06.003 |
| 分类号:TE821 |
| 基金项目:科技部“十一五”支撑项目(2006BAJ01B04). |
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| Vibration characteristic analysis of 160 000 m3 LNG storage tank |
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ZHAI Ximei, WANG Haosong, FAN Feng
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(School of Civil Engineering, Harbin Institute of Technology, 150090 Harbin, China)
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| Abstract: |
| To investigate the natural vibration characteristics of the 160 000 m3 full capacity liquefied natural gas (LNG) storage tank, a fine finite element model for the tank with reasonable element types and mesh dimension was established using the finite element software (ANSYS). Using direct coupling method for the fluid-structure coupling constraints and the reduced mothed for analysis, the natural vibration characteristics of the tank is obtained when the tank is empty or full and leak at full or harf full liquid level. The liquid's influence on the vibration characteristics of tank structure is given. Besides, the influence of the prestress, the pressure of the gas and the constraint at the bottom of the outer tank structure is considered. The research results above can provide a reference basis for engineering design of the LNG storage tanks. |
| Key words: LNG storage tank fluid structure interaction natural vibration characteristics finite element analysis |
