摘要
本文针对连拱坝的动力特性,提出了子结构交叉综合法的计算方法.在这种计算方法中,以一个支墩与相邻两拱形成动力子结构,以子结构截尾模态作为基向量,再利用RayleighRitz法则求取连拱坝的总体模态
In this paper the cross synthesis method for modal analysis of multiple arch dams is proposed. In this model the substructure is formed by a buttress and two neighboring arches and every substructure is crossed each other. The truncated modal vectors of substructure are employed as basic vectors for Rayleigh Ritz principle. Two examples are given for illustration.
引文
〔1〕曹楚生,连拱坝的横向地震重力分析商榷中国水利,1957年,8月〔2〕路观平等,佛子岭连拱坝原型动力试验待发表〔3〕Gladwel,G.M.L.,Branchmodeanalysisofvibratingsystems.Journalofsoundandvibration,Vol.1,№.1,1964.〔4〕Hurty,W.C.,Dynamicanalysisofstructuralsystemsusingcomponentmodes.AIAAJournal,Vol.3,№.4,April,1965.〔5〕Robert,L.Goldman,Vibsationanalysisdynamicpartitionary.AIAAJournal,June,1969.Vol.7№.6.〔6〕Benfield,W.A.,Hruda,R.F.,Vibrationanalysisofstructuresbycomponentmodesubstitution.AIAAJournal,Vol.9,№.7,July,1971.〔7〕Holze,G.H.,Boresi,A.P.,Freevibrationanalysisusingsubstrcturing.JournalSTDiv.ProcedingASCE.,Dec.1975,Vol.101,ST12.〔8〕路观平,支墩坝横向剪切振动的计算安徽省水利科学研究所研究成果报告,1963年