本文選題：塔身結(jié)構(gòu) + 有限元��； 參考：《大連理工大學(xué)》2013年碩士論文

【摘要】：本文運(yùn)用有限元分析獲得塔身典型工況下的應(yīng)力分布及應(yīng)力集中情況,找出疲勞危險(xiǎn)部位；將有限元軟件ANSYS與三維軟件ProE中的模態(tài)中性文件導(dǎo)入動(dòng)力學(xué)仿真軟件ADAMS中,并利用ADAMS進(jìn)行仿真獲得塔身危險(xiǎn)部位的載荷—時(shí)間歷程曲線及數(shù)據(jù),結(jié)合調(diào)研工況比例,進(jìn)行擴(kuò)展獲得載荷譜；查看材料疲勞試驗(yàn)的S-N曲線,并通過修正其他影響參數(shù),得到修正S-N曲線；最終運(yùn)用線性疲勞累積損傷理論Miner計(jì)算得出塔身壽命。論文的主要工作如下： 1)簡(jiǎn)述大型塔機(jī)發(fā)展歷程以及疲勞理論發(fā)展方向,給出了疲勞分析法的步驟—流程圖 2)運(yùn)用有限元分析軟件ANSYS對(duì)塔式起重機(jī)塔身結(jié)構(gòu)進(jìn)行殼單元建模,并進(jìn)行典型工況分析,得出應(yīng)力分布云圖,找到應(yīng)力集中及局部大應(yīng)力等危險(xiǎn)點(diǎn)位置。 3)根據(jù)塔式起重機(jī)的工作特點(diǎn),進(jìn)行ADAMS動(dòng)力學(xué)仿真,在四種典型工況下,得到典型工況對(duì)整機(jī)性能,尤其塔身的動(dòng)態(tài)性能曲線,并獲得載荷—時(shí)間歷程曲線及數(shù)據(jù),結(jié)合四種工況的比例,擴(kuò)展形成最終的載荷譜。 4)選用合適的疲勞分析理論,結(jié)合載荷譜及材料性能曲線(修正S-N曲線)進(jìn)行塔機(jī)疲勞壽命計(jì)算,通過有限元計(jì)算結(jié)果和疲勞分析計(jì)算結(jié)果研究塔機(jī)結(jié)構(gòu)的起重能力與抗疲勞能力。 5)研究不同腹桿布置形式對(duì)塔身結(jié)構(gòu)疲勞的影響,選用最常用的幾種布置形式：N字型、K字型、X字型塔身結(jié)構(gòu),并根據(jù)步驟4中的分析結(jié)果,進(jìn)行疲勞壽命比較。
[Abstract]:In this paper, the stress distribution and stress concentration under typical working conditions of tower body are obtained by finite element analysis, and the fatigue dangerous position is found, and the modal neutral files of finite element software ANSYS and three-dimensional software ProE are imported into the dynamic simulation software ADAMS. The load-time history curve and data of dangerous parts of tower body are obtained by ADAMS simulation, and the load spectrum is obtained by expanding the load spectrum in combination with the proportion of investigation conditions, the S-N curve of material fatigue test is checked, and other influencing parameters are corrected. The modified S-N curve is obtained, and finally the tower life is calculated by linear fatigue cumulative damage theory (Miner). The main work of the thesis is as follows: 1) A brief description of the development of large tower cranes and the development direction of fatigue theory are given, and the steps of fatigue analysis are given. 2) finite element analysis software ANSYS is used to model the tower structure of tower crane, and the typical working condition is analyzed, and the stress distribution cloud diagram is obtained, and the dangerous points such as stress concentration and local large stress are found. Combined with the ratio of four working conditions, the final load spectrum is formed by expansion. 4) selecting appropriate fatigue analysis theory, combining load spectrum and material performance curve (modified S-N curve) to calculate the fatigue life of tower crane. The lifting capacity and fatigue resistance of tower crane are studied by finite element method and fatigue analysis.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH213.3

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 荊鵬飛;大型履帶起重機(jī)桁架臂結(jié)構(gòu)壽命預(yù)測(cè)方法研究[D];大連理工大學(xué);2006年

2 陳國(guó)華;在役塔式起重機(jī)剩余壽命綜合預(yù)測(cè)[D];南京工業(yè)大學(xué);2006年

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本文編號(hào)：1933746