Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1549
標題: 電扶梯鏈條之應力和磨耗分析
The stress and wear analyses of an escalator
作者: 簡丞廷
Chien, Cheng-Ting
關鍵字: chain;鏈節;interference fit;finite element;model;干涉配合;有限元素;模型
出版社: 機械工程學系所
引用: [1] Tien Yuen Machinery MFG. CO., LTD. [2] Khristich Viktor Konstantinovich, Yury Kireev, “High-rise escalators: Schematic diagrams, characteristics, merits and demerits,” Elevator World, Vol. 52, num. 2, 2004, pp. 63-68. [3] M. K. Kesikci, I. Gerdemeli, C. E.Imrak and M. C. Fetvaci, “Boundary Element modeling and static analysis of chain links,” AED2004 4th International Conference, 2004, pp. 5-8. [4] The American Society of Mechanical Engineers, “Precision power transmission roller Chains, attachments and sprockets,” ANSI B29.1, 1993 [5] Yuan J. X., and Wu X. M., “Identification of the machine tool structural parameters by Dynamic Data System (DDS) and finite element method,” Transactions of the ASME, Journal of Engineering for industry, Vol. 107, 1985, pp. 64-69. [6] 沈保衡, “無介面層之螺栓接合界面模擬之方法” ,國立中興大學機械工程研究所, 民國92年11月。 [7] 鍾炳春, “ASNI反齒型鏈片之最佳化設計” ,國立中興大學機械工程研究所, 民國93年12月。 [8] Hertz, H., “On the contract of elastic solids,” Journal Reine and Angew. Math., Vol. 92, 1882, pp. 156-171. [9] Archard, J. F., “Contact and Rubbing of Flat Surfaces,” Journal of Applied Physics, Vol. 24, num. 8, 1953, pp. 981-988. [10] Podra Priit, Andersson Soren, “Simulating sliding wear with finite element method,” Tribology International, Vol. 32, num. 2, 1999, pp. 71-81. [11] Lim S. C., Ashby M. F., “Wear-mechanism maps,” Acta Metallurgica, Vol. 35, num. 1, 1987, pp. 1-24. [12] Fregly Benjamin J., Sawyer W. Gregory, Harman Melinda K., Banks Scott A., “Computational wear prediction of a total knee replacement from in vivo kinematics,” Journal of Biomechanics, Vol. 38, num. 2, 2005, pp. 305-314. [13] 葛世榮, 索雙富, “抗磨可靠性壽命的加速試驗與預測” ,摩擦學學報, 第15卷, 第4期, 1995年10月, 368-372頁。 [14] Ansel C. Ugural, Mechanical design, McGraw. Hill, 2004. [15] L. L. Faulkner, S. B. Menkes, Chains for power transmission and material handling, Marcel Dekker Inc., 1982. [16] Kevin Kilroy, MSC Nastran version 70.5 Quick Reference Guide, The MacNeal-Schwendler Corporation, 1998. [17] 立雅科技, Solidworks2005, 知城數位科技股份有限公司, 2004。 [18] 馬愛軍, 周傳月, 王旭, Patran和Nastran有限元素分析專業教程, 清華大學出版社, 2005。 [19] Priit Põdrs, Sõren Andersson, “Simulating sliding wear with finite element method,” Tribology International, Vol. 32, 1999, pp. 71 -81.
摘要: 
有關鏈條的分析,在以往大多使用單片鏈片進行分析,而鏈節在組裝完成為鏈條後,在尚未使用受力之前,已經受到組裝時的緊配力作用,因此鏈節內真正的應力應為組裝後的緊配力所產生之應力再加上外力所產生之應力。
本文的目的在於利用有限元素軟體模擬踏階鏈條的受力情況,分析鏈條可能發生損壞的區域以及磨耗情況,並探討鏈條的相關尺寸對應力和節距的影響。文中利用彈簧元素模擬鏈節緊配時的接合介面元素,使用兩空心圓柱的緊配公式算得鏈節組裝時的近似緊配壓力,並檢討干涉量之大小。將鏈節所受外力求得後,施加於有限元素模型進行鏈節受力分析,進一步推測鏈節的疲勞破壞區域,以利未來踏階鏈條的設計。另一方面,使用赫茲接觸理論以及Archard線性磨耗理論進行鏈節的磨耗分析,並構想一磨耗測試機,利用測試機與電扶梯實際運轉的磨耗比進行磨耗壽命的預估以及加速試驗。最後,利用求得的磨耗公式進行銷子與套管磨耗情況的模擬,並就磨耗情形預估鏈條的伸長量。

The common stress analysis of the link of a chain is based on a single link. However the assembly of a link will produce internal stresses due to interference fit. Therefore the total stress in the link is the sum of stresses due to interference fit and those due to external forces.
The purpose of this thesis is to create a finite element model to analyze the stresses in the link and also establish a wear model to analyze the wear of the chain. The tolerances of link hole, pin and bushing will be examined to find the interference stresses and the extension of the pitch due to interference fit. Spring elements are used to model the stiffness of interference fit. The approximate contact pressure due to interference is obtained by using thick-walled cylinder formulas. The combined stresses by interference fit and external load are used to predict fatigue failure area. While the Hertz contact theory and Archard's wear theory are used to analyze the wear of the chain. A wear test machine will be made to test the wear of the chain. Finally the wear depth of the pin and bushing and the elongation of the chain are predicted.
URI: http://hdl.handle.net/11455/1549
其他識別: U0005-1001200718092700
Appears in Collections:機械工程學系所

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