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橋式起重機結構設計及有限元分析+CAD圖紙

時間:2019-05-25 21:20來源:畢業論文
將建立的橋式起重機三維模型導入ANSYS 中,確定單元類型進行網格劃分,利用軟件中靜力模塊對橋式起重機梁結構在承受最大載重量且在不同承載位置時的有限元分析

摘要近年來由于電子設備的廣泛使用,起重機設計方法從傳統的力學計算,提升到通過計算器、有限元軟件等現代產品的幫助實現橋式起重機的模塊化、參數化設計。以往設計員在設計時常采用經典力學法,在結構分析時還是手工計算,對復雜結構的分析,假設和簡化運用太多,計算出的結果很難保證精準度,這對使用安全埋下了很大的隱患。隨著機械制造業技術的高速發展,工廠生產線大多已經進入自動化階段,橋式起重機的設計理念也應有所轉變,以尋求新的進步。本論文在進行橋式起重機結構設計時采用了傳統力學與先進科學技術相結合的設計方法。首先運用力學方法初步確定起重機的各部分結構尺寸,并進行校核,在符合安全要求的條件下,建立其三維模型。先在建模軟件 PRO/E 中繪制出此單梁橋式起重機的主梁和端梁的實體模型,確定壁厚、長度等一系列參數,然后將各個部件進行裝配,得到整機的三維模型。將建立的橋式起重機三維模型導入ANSYS 中,確定單元類型進行網格劃分,利用軟件中靜力模塊對橋式起重機梁結構在承受最大載重量且在不同承載位置時的有限元分析,通過設置相應的參數系統會解出橋架最大變形和最大應力所在的位置,找到橋架結構的薄弱點。分析結果表明,最大應力出現在主、端梁的連接處為173MPa 小于許用應力200MPa 滿足要求,最大變形出現主梁中央為29mm 滿足剛度要求。最后對單梁橋式起重機進行模態分析,得出載荷在不同位置時的固有頻率和固有振動,驗證單梁橋式起重機在實際工作中的穩定性、可靠性。35722

源¥自%六^^維*論-文+網=www.aftnzs.live


關鍵詞:單梁橋式起重機,橋架結構設計,有限元分析,模態分析
AbstractIn recent years, due to the widespread use of the computer, crane design has improved fromthe traditional mechanical calculation methods to using computers to finish the modular designof cranes.In the past, designers often use classical mechanics method to design and manuallycalculate when structural analysis. The analysis of complex structures using too muchassumptions and simplifications, which is difficult to ensure the accuracy of calculatedresult.This planted a lot of hidden dangers when we using the crane.With the development ofmachinery manufacturing intelligent technology, overhead crane must change the traditionaldesign methods to seek new progress.In this paper, during overhead crane designing I combined the traditional mechanicaldesign methods with the advanced science technology . First, the use of mechanical methods todetermine the initial size of each part of the structure of the crane and verification.Underpremise of the safety requirements, the construction of three-dimensional models. First draw inthe modeling software PRO / E in a solid model for this single-girder bridge crane girders andend of the beam to determine the thickness, length and a series of parameters, and then theinpidual components are assembled to give a three-dimensional model of the machine. Thethree-dimensional model of the bridge crane into ANSYS, the use of software modules for staticbridge crane beam finite element analysis under extreme load conditions, intuitive draw thestress distribution and deformation of the bridge and find the weak bridge structure points to theoverall design improvements.The results show that the maximum stress occurs at the junction ofthe main beam and the end of the beam.The maximum stress is 173MPa less than the allowablestress 200MPa meet the requirements.The maximum deformation appearing central to the mainbeam is 29mm which meeting the stiffness requirements.Finally, make a modal analysis for thesingle girder crane , getting the natural frequencies and vibration loads at different locations toverify the stability and reliability of the single girder overhead crane in the actual work.KeyWords:Bridge crane,The design of ridge construction,Finite element analysis,Modal Analysis 橋式起重機結構設計及有限元分析+CAD圖紙:http://www.aftnzs.live/jixie/20190525/33801.html
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