本文關(guān)鍵詞：船廠門吊超大箱型變截面支腿的穩(wěn)定性分析　出處：《石家莊鐵道大學》2015年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 船廠門吊 超大薄壁箱型截面 變截面支腿 整體穩(wěn)定性 局部穩(wěn)定性

【摘要】：隨著國民經(jīng)濟的發(fā)展,我國造船業(yè)發(fā)展十分迅猛,對船廠門吊的需求越來越大。造船廠門吊具有跨度大、支腿高、起重量大的特點,通常采用一剛一柔支腿的結(jié)構(gòu)形式,其剛性支腿常采用變截面箱型截面,這種結(jié)構(gòu)形式的立柱計算整體穩(wěn)定性時,其長度計算系數(shù)的選取尚沒有明確的規(guī)定。同時,支腿采用的薄壁箱型結(jié)構(gòu),板件寬厚比超大,如何采取適當?shù)臉?gòu)造措施保證其局部穩(wěn)定性也是一個值得研究的問題。論文以新大方重工科技有限公司為新加坡某造船廠開發(fā)研制的CS1500/1000×87雙梁造船起重機為研究范例,利用Ansys軟件,建立有限元分析模型,對此類超大箱型變截面支腿的穩(wěn)定性進行了分析研究,論文主要工作如下:(1)對結(jié)構(gòu)穩(wěn)定理論和分析方法進行了具體介紹,重點介紹了臨界荷載的求解方法。(2)利用BEAM189單元建立門吊整體穩(wěn)定性分析模型,通過改變門吊梁柱的高度、跨度和截面特性,得到不同梁柱線剛度比下的門吊剛性支腿發(fā)生特征值屈曲時的臨界應(yīng)力。通過與歐拉公式的比擬,得到支腿的計算長度系數(shù)。分別擬合得到等截面和變截面剛性支腿的計算長度估算公式。(3)利用SHELL181單元建立剛性支腿的局部穩(wěn)定性分析模型,進行幾何非線性和材料非線性分析得到非線性屈曲荷載。通過局部穩(wěn)定非線性屈曲荷載不低于整體穩(wěn)定屈曲荷載的條件,研究合理有效的局部穩(wěn)定性構(gòu)造措施,研究了橫隔板對局部穩(wěn)定性的影響。論文的結(jié)果可為船廠門吊支腿及類似超大截面薄壁箱型柱的設(shè)計提供一定的參考。
[Abstract]:With the development of the national economy, the development of China's shipbuilding industry is very rapid, the demand of the shipyard gantry crane is more and more big. The shipyard door crane has large span, high leg, feature weight, usually adopts the structure form just a soft leg, the rigid leg often adopts a variable cross-section box section the column, the structure of the overall stability calculation, the calculation length coefficient is not clearly defined. At the same time, thin-walled box structure with outrigger, width thickness ratio is large, how to take appropriate measures to ensure the construction of local stability is a problem worthy of study. Based on the new Dafang heavy industry Singapore Technology Co. Ltd. is a shipbuilding factory developed CS1500/1000 * 87 shipbuilding double beam crane as the research paradigm, using Ansys software, a finite element analysis model for such a large box type variable stability section of legs The analysis and research, the main work is as follows: (1) on the structure stability theory and analysis method are introduced, emphatically introduces the solving method of the critical load. (2) to establish the analysis model of integral stability of gantry crane using BEAM189 unit, by changing the gantry crane beam column height, span and section properties, different beam column the linear stiffness ratio of gantry rigid leg the eigenvalue of critical buckling stress. When compared with the Euler formula by the calculated length coefficient of the leg. The fitting were calculated and variable cross-section rigid leg length formula. (3) the local stability analysis model established by the rigid leg SHELL181 unit, geometric nonlinear and material nonlinear analysis nonlinear buckling loads are obtained. The local stability of nonlinear buckling load of not less than the overall buckling load stable, reasonable and effective research The local stability of structural measures, studied the effect of diaphragm on local stability. The results of this thesis can provide some reference for the design of the shipyard gantry crane legs and similar large cross section thin-walled box column.

【學位授予單位】：石家莊鐵道大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U673.38

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本文編號：1419122