本文選題：雙頭螺柱 + 全斷面隧道掘進機��； 參考：《大連理工大學》2015年碩士論文

【摘要】：全斷面隧道掘進機(TBM)是大型、高效的隧道施工裝備,是機、電、液、光、氣等系統(tǒng)集成的工廠化流水線。它具有高效、環(huán)保、經濟、安全等優(yōu)點,適用于復雜地質結構中大埋深、長隧道的施工,在各類隧道施工中得到廣泛應用。TBM刀盤受到較大扭矩、軸向力、徑向力和傾覆力矩等復雜載荷的綜合作用,刀盤轉接座與主軸承通過雙頭螺柱實現(xiàn)連接�，F(xiàn)有某一型號TBM,雙頭螺柱在施工中多次發(fā)生斷裂現(xiàn)象,嚴重影響了施工進度,存在嚴重的安全隱患,也造成一定的經濟損失。本文就這一問題展開研究,探求解決問題的方法。研究從分析雙頭螺柱的實際載荷入手,判斷連接面的接觸狀態(tài),得到極端載荷作用下連接面會發(fā)生滑移的結論。建立了雙頭螺柱連接副的有限元分析模型,分析在給定預緊力和橫向偏移條件下雙頭螺柱的受力狀態(tài)。分析結果表明,當橫向偏移達到5.87mm時,雙頭螺柱第一扣的兩側受力不均,加劇了螺紋根部處的應力集中,局部最大應力值超過材料的強度極限,進而誘發(fā)裂紋,最終導致螺栓的脆性斷裂。根據(jù)分析結果,提出了保證連接面接觸狀態(tài)的表面處理方法,改進了現(xiàn)有的安裝工藝,從而避免雙頭螺柱的斷裂,保證連接的可靠性。本文的研究內容和分析方法,對雙頭螺柱的設計校核和故障診斷具有一定的指導意義。
[Abstract]:TBMM is a large and efficient tunnel construction equipment. It is an integrated industrial assembly line of machine, electricity, liquid, light, gas and so on. It has the advantages of high efficiency, environmental protection, economy, safety and so on. It is suitable for the construction of large buried and long tunnels in complex geological structures. It is widely used in all kinds of tunnel construction. TBM cutter is subjected to greater torque and axial force. Because of the complex loads such as radial force and overturning moment, the turning seat of the cutter head and the main bearing are connected by double studs. At present, a certain type of TBM, double head stud breaks many times in construction, which seriously affects the progress of construction, has serious hidden trouble of safety, and also causes certain economic losses. This paper studies this problem and explores the methods to solve it. Based on the analysis of the actual load of the double-ended stud, the contact state of the connection surface is judged, and the conclusion that the connection surface will slip under extreme load is obtained. The finite element analysis model of double end stud joint is established, and the stress state of double head stud is analyzed under the condition of pretightening force and lateral deviation. The results show that when the lateral deviation reaches 5.87mm, the stress on both sides of the first buckle of the double head stud is uneven, which intensifies the stress concentration at the root of the thread, and the local maximum stress value exceeds the strength limit of the material and then induces the crack. Finally, it leads to the brittle fracture of bolts. Based on the analysis results, a surface treatment method is proposed to ensure the contact state of the connection surface, and the existing installation process is improved to avoid the fracture of the double head stud and to ensure the reliability of the connection. The research content and analysis method of this paper have certain guiding significance to design, check and fault diagnosis of double head stud.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U455.31

【參考文獻】

相關期刊論文 前1條

1 張傳良;金明輝;;淺談高強螺栓施工[J];城市住宅;2009年10期

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本文編號：1844263