發(fā)布時(shí)間：2018-03-12 20:43

  本文選題：模態(tài)分析　切入點(diǎn)：靜態(tài)分析　出處：《南京理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：本文基于現(xiàn)代設(shè)計(jì)方法中的有限單元法和結(jié)構(gòu)優(yōu)化設(shè)計(jì)方法,以某50t-31.5m橋式起重機(jī)為研究對(duì)象,完成了多種工況下材料分別為Q235和Q345的橋式起重機(jī)橋架的輕量化設(shè)計(jì)研究。 首先介紹了起重機(jī)的研究現(xiàn)狀和CAE技術(shù)的在起重機(jī)行業(yè)的應(yīng)用現(xiàn)狀,深入研究了有限元法的理論基礎(chǔ)及有限元分析軟件HyperWorks。在第三章詳細(xì)描述了此橋式起重機(jī)的金屬結(jié)構(gòu)并建立其幾何模型,此外,運(yùn)用前處理軟件HyperMesh建立了起重機(jī)橋架的有限元模型,對(duì)有限元建模過(guò)程進(jìn)行了詳細(xì)闡述。在第四章分別對(duì)橋架的整個(gè)有限元模型和半個(gè)有限元模型進(jìn)行了模態(tài)分析和靜態(tài)分析,分析計(jì)算結(jié)果表明此橋式起重機(jī)橋架的結(jié)構(gòu)性能的安全系數(shù)過(guò)大還存在很大的優(yōu)化空間,因此有必要對(duì)其進(jìn)行結(jié)構(gòu)輕量化設(shè)計(jì)。在第五章為了驗(yàn)證有限元模型及其計(jì)算結(jié)果的準(zhǔn)確性,采用解析法對(duì)橋式起重機(jī)的主梁進(jìn)行靜力學(xué)理論計(jì)算,其結(jié)果與有限元計(jì)算結(jié)果相當(dāng)吻合,確保了有限元計(jì)算結(jié)果的可信度。 本文在第六章深入研究了各種結(jié)構(gòu)優(yōu)化設(shè)計(jì)方法和流程,及Optistruct中的結(jié)構(gòu)優(yōu)化方法,并分別對(duì)材料為Q235和Q345的橋式起重機(jī)橋架結(jié)構(gòu)進(jìn)行多種工況下的形狀優(yōu)化、尺寸優(yōu)化、拓?fù)鋬?yōu)化以及綜合優(yōu)化,此外,還對(duì)主梁進(jìn)行了板厚變截面優(yōu)化設(shè)計(jì)和魚(yú)腹梁變截面優(yōu)化設(shè)計(jì)。首先建立橋架結(jié)構(gòu)的優(yōu)化設(shè)計(jì)數(shù)學(xué)模型,各個(gè)優(yōu)化設(shè)計(jì)的優(yōu)化模型雖有所區(qū)別,但最終目標(biāo)都是減少起重機(jī)橋架的自重,實(shí)現(xiàn)輕量化設(shè)計(jì)的目的。通過(guò)本文的研究表明采用結(jié)構(gòu)優(yōu)化方法進(jìn)行橋架設(shè)計(jì)可以在滿足起重機(jī)強(qiáng)度剛度的設(shè)計(jì)要求下實(shí)現(xiàn)結(jié)構(gòu)輕量化設(shè)計(jì),效果顯著。將材料分別為Q235和Q345的橋架的優(yōu)化結(jié)果進(jìn)行對(duì)比,發(fā)現(xiàn)只提高材料的強(qiáng)度,橋式起重機(jī)的結(jié)構(gòu)綜合性能沒(méi)有明顯改進(jìn),必須同時(shí)提高材料的強(qiáng)度和剛度,才能得到更大的優(yōu)化空間,使結(jié)構(gòu)優(yōu)化更有意義。 論文研究提高了起重機(jī)主梁結(jié)構(gòu)的設(shè)計(jì)水平,使得起重機(jī)箱形梁結(jié)構(gòu)設(shè)計(jì)更加合理,對(duì)起重機(jī)橋架的結(jié)構(gòu)設(shè)計(jì)具有一定的指導(dǎo)意義和參考價(jià)值。
[Abstract]:Based on the finite element method and structural optimization design method in modern design method, this paper takes a 50t-31.5m bridge crane as the research object, and completes the lightweight design of bridge crane with Q235 and Q345 materials under various working conditions. Firstly, the research status of crane and the application of CAE technology in crane industry are introduced. The theoretical basis of finite element method and finite element analysis software HyperWorks.In the third chapter, the metal structure of the bridge crane is described in detail and its geometric model is established. The finite element model of crane bridge is established by using pre-processing software HyperMesh, and the process of finite element modeling is described in detail. In chapter 4th, modal analysis and static analysis of the whole finite element model and half finite element model of bridge frame are carried out, respectively. The results of analysis and calculation show that there is still a large space for optimization of the safety factor of the bridge frame of the bridge crane. Therefore, it is necessary to carry out structural lightweight design. In Chapter 5th, in order to verify the accuracy of the finite element model and its calculation results, an analytical method is used to calculate the static theory of the main girder of a bridge crane. The results are in good agreement with the results of finite element calculation, which ensures the reliability of the results. In Chapter 6th, various structural optimization methods and processes, and structural optimization methods in Optistruct are studied, and the shape and size optimization of bridge crane bridge structure with Q235 and Q345 are carried out under various working conditions, respectively. In addition, the optimization design of the main beam with variable section thickness and the variable section of the fish-web beam is carried out. Firstly, the mathematical model of the optimal design of the bridge frame structure is established, and the optimization models of each optimization design are different. But the ultimate goal is to reduce the weight of the crane's bridge, The aim of lightweight design is realized. The research in this paper shows that the structure lightweight design can be realized by adopting the structural optimization method to design the bridge under the requirements of the crane strength and stiffness. The results show that the strength of the bridge crane can only be increased, and the comprehensive performance of the bridge crane structure is not improved obviously, so the strength and stiffness of the bridge crane must be improved simultaneously, and the optimization results of the bridge frame with the material Q235 and Q345 are compared, and it is found that the strength of the bridge crane can only be improved. Only then can we get more optimization space and make the structure optimization more meaningful. In this paper, the design level of crane main girder structure is improved, and the design of crane box girder structure is more reasonable, which has certain guiding significance and reference value for crane bridge frame structure design.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH215

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 寧朝陽(yáng);周華祥;;箱形主梁結(jié)構(gòu)優(yōu)化設(shè)計(jì)[J];長(zhǎng)沙交通學(xué)院學(xué)報(bào);2007年02期

2 余啟志;陳丹曄;陳燕;;車身有限元與試驗(yàn)?zāi)B(tài)分析比較[J];東華大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年04期

3 陳琪;高建和;吳宏祥;徐長(zhǎng)奎;;數(shù)控轉(zhuǎn)塔沖床機(jī)身模態(tài)分析與優(yōu)化設(shè)計(jì)[J];鍛壓裝備與制造技術(shù);2011年04期

4 商廣泰,鐘文樂(lè),蔣鳳昌;基于ANSYS分析的鋼梁優(yōu)化設(shè)計(jì)[J];工程建設(shè)與設(shè)計(jì);2005年03期

5 鄧宏光;白天翔;盛言忠;游思坤;;基于有限元分析的單梁橋式起重機(jī)優(yōu)化設(shè)計(jì)[J];鋼結(jié)構(gòu);2009年02期

6 陽(yáng)云華,金光振;橋式起重機(jī)三維有限元分析[J];湖北工學(xué)院學(xué)報(bào);2003年02期

7 陸大明;;起重機(jī)械國(guó)際國(guó)內(nèi)標(biāo)準(zhǔn)的現(xiàn)狀和發(fā)展趨勢(shì)[J];建設(shè)機(jī)械技術(shù)與管理;2005年12期

8 張志鑫;;ANSYS在桁架結(jié)構(gòu)門(mén)機(jī)主梁優(yōu)化設(shè)計(jì)中的應(yīng)用[J];建設(shè)機(jī)械技術(shù)與管理;2009年08期

9 王小明;盧志強(qiáng);;國(guó)內(nèi)外大型起重機(jī)的研究現(xiàn)狀及發(fā)展趨勢(shì)[J];機(jī)電產(chǎn)品開(kāi)發(fā)與創(chuàng)新;2009年02期

10 陸大明;;我國(guó)起重機(jī)行業(yè)發(fā)展對(duì)策及形勢(shì)分析[J];機(jī)械工業(yè)標(biāo)準(zhǔn)化與質(zhì)量;2009年08期

相關(guān)碩士學(xué)位論文 前10條

1 閆利利;起重機(jī)箱形梁的拓?fù)鋬?yōu)化研究[D];鄭州大學(xué);2010年

2 薛盼;汽車起重機(jī)臂架結(jié)構(gòu)分析與優(yōu)化設(shè)計(jì)研究[D];蘭州理工大學(xué);2011年

3 劉云峰;橋式起重機(jī)箱形主梁腹板新型結(jié)構(gòu)研究[D];昆明理工大學(xué);2001年

4 徐新輝;基于ANSYS分析的龍門(mén)起重機(jī)箱型主梁優(yōu)化設(shè)計(jì)[D];武漢理工大學(xué);2005年

5 程麗珠;橋式起重機(jī)主梁結(jié)構(gòu)分析和優(yōu)化設(shè)計(jì)[D];吉林大學(xué);2006年

6 李凌飛;基于變密度法的結(jié)構(gòu)拓?fù)鋬?yōu)化研究[D];吉林大學(xué);2007年

7 禹海燕;橋式起重機(jī)空腹式箱形主梁的有限元分析[D];太原科技大學(xué);2008年

8 李麗娜;單梁龍門(mén)起重機(jī)結(jié)構(gòu)分析及優(yōu)化[D];武漢理工大學(xué);2009年

9 李博;基于HyperWorks的某雷達(dá)零部件的拓?fù)鋬?yōu)化設(shè)計(jì)[D];合肥工業(yè)大學(xué);2009年

10 趙超凡;20t龍門(mén)起重機(jī)箱形主梁力學(xué)分析及優(yōu)化設(shè)計(jì)[D];蘭州理工大學(xué);2009年

，

本文編號(hào)：1603229