能量變分法在現(xiàn)代結(jié)構(gòu)分析中的應(yīng)用
劉開國
- 摘 要
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劉開國(中南建筑設(shè)計(jì)院股份有限公司,武漢 430071)[摘要] 現(xiàn)代結(jié)構(gòu)的分析方法,基本上可以分為兩大類:一類是有限元法,另一類是連續(xù)化法。但是這兩類分析方法的理論基礎(chǔ)均為能量變分原理。對(duì)能量變分法在有限元法和連續(xù)化法中的應(yīng)用作了簡(jiǎn)要的介紹,并對(duì)現(xiàn)代結(jié)構(gòu)分析中的勢(shì)能原理與余能原理以及位移函數(shù)與拉格朗日乘子等問題進(jìn)行了探討。得出了一些有益的結(jié)論,對(duì)工程應(yīng)用有一定參考價(jià)值。[關(guān)鍵詞] 能量變分法;有限元法;連續(xù)化法;現(xiàn)代結(jié)構(gòu)分析中圖分類號(hào):TU31,TU973 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1002-848X(2012)12-0078-04Application of energy variational method in the current structure analysisLiu Kaiguo(Central-south China Architectural Design Institute Co., Ltd., Wuhan 430071, China)Abstract: The analysis methods of current structures may be divided into two main classes: one is finite element method, the other is equivalent continuum method. But the theory of this two analysis methods are based on the energy variational principle. The application of energy variational method to finite element method and equivalent continuum method was briefly introduced. The problems of potential energy, complementary energy, displacement function and Lagrange multiplier in the current structure analysis were discussed. Some useful conclusions were summarized, which will be valuable for the further practice.Keywords: energy variational method; finite element method; equivalent continuum method; current structure analysis作者簡(jiǎn)介:劉開國,教授級(jí)高級(jí)工程師參考文獻(xiàn)[1] 胡海昌.彈性力學(xué)的變分原理及其應(yīng)用[M].北京:科學(xué)出版社,1982.[2] 馮康,石鐘慈.彈性結(jié)構(gòu)的數(shù)學(xué)理論[M].北京:科學(xué)出版社,1981.[3] 錢偉長.變分法及有限元[M].北京:科學(xué)出版社,1980.[4] 劉開國.結(jié)構(gòu)簡(jiǎn)化計(jì)算原理及其應(yīng)用[M].北京:科學(xué)出版社,1996.[5] 劉開國.高層與大跨度結(jié)構(gòu)簡(jiǎn)化分析技術(shù)及算例[M].北京:中國建筑工業(yè)出版社,2006.[6] 劉開國.現(xiàn)代結(jié)構(gòu)理論分析與簡(jiǎn)化計(jì)算[M].北京:科學(xué)出版社,2010.
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