Super element approach to cable passing through multiple pulleys |
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| Institution: | 1. School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment, Wuhan 430074, China;1. Department of Automotive Engineering, Vietnam Maritime University, Hai Phong, Viet Nam;2. Department of Mechanical Engineering, Kyung Hee University, Yongin, South Korea;1. Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;2. Center for Healthcare Robotics, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea;1. Department of Civil Engineering, University of Chile, Av. Blanco Encalada, 2002, Santiago, Chile;2. Facultad de Ingeniería y Ciencias Aplicadas, Universidad de los Andes, Monseñor Álvaro del Portillo N°12.455, Las Condes, Santiago, Chile;3. School of Civil and Mechanical Engineering, Curtin University, Perth, WA, Australia;4. Department of Civil and Environmental Engineering, Universidad del Norte, Barranquilla, Colombia |
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| Abstract: | A parametric super element model for cable passing through multiple pulleys is presented in this study for the static analysis of structures. The amounts of cable passages over pulleys are introduced as additional degrees-of-freedoms in the finite element model and the relationship between cable tensions at the two sides of each pulley is imposed based on the friction law or empirical data. The proposed finite element model is firstly verified by a simple pulley cable system and then applied to the analysis of real complex engineering structures. The verification results satisfy the static equilibrium and deformation compatibility conditions of the structural system and basic engineering principles. With the application of the proposed super element model, the global deformation and stress distribution for structures with multiple-pulley cable systems can be effectively and accurately computed. Numerical results for structural analysis show that the effect of friction of pulleys on the cable tensions is significant and the friction-free and fixed models both give unrealistic and incorrect results in cable tensions in some cases. |
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