Simulating a conical tuned liquid damper |
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| Affiliation: | 1. Department of Structural Mechanics, University of Pavia, Via Ferrata 1, 27100 Pavia, Italy;2. Department of Structural Engineering and Geotechnics, Polytechnic of Turin, Corso Duca degli Abruzzi 34, 10100 Torino, Italy;1. Key Laboratory of Coastal Disaster and Protection of Ministry of Education, Hohai University, Nanjing 210024, China;2. College of Harbour Coastal and Offshore Engineering, Hohai University, Nanjing 210024, China;3. School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, China;1. Computational Mechanics Lab., Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa, 320006, Israel;2. General Fusion Inc., 106-3680 Bonneville PI, Burnaby, BC, V3N 4TS, Canada;1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;2. Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China;1. Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, United States;2. Department of Mechanical Engineering, Rice University, Houston, TX 77005, United States;3. Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, Dublin 2, Ireland;1. BMT Fluid Mechanics Ltd., Teddington, UK;2. BMT Fluid Mechanics Ltd., Kuala Lumpur, Malaysia;3. SoftSim Consult Ltd., Sofia, Bulgaria;1. Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali (DICAM), Università degli Studi di Palermo, viale delle Scienze, I-90128 Palermo, Italy;2. Facoltà di Ingegneria ed Architettura, Università degli Studi di Enna “Kore”, Cittadella Universitaria, Enna Bassa, I-94100 Enna, Italy |
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| Abstract: | In recent years, tuned liquid dampers (TLD) have proved a successful control strategy for reducing structural vibrations. The present study focuses on the frustum-conical TLD as an alternative to the traditional cylindrical tank. If compared to the cylindrical reservoir, the cone-shaped TLD allows calibrating its natural frequency through varying liquid depth, which makes it suitable for a semi-active implementation, and attains the same level of performance with a fewer mass, at least for small fluid oscillations. A linear model is presented which can interpret TLD’s behaviour for small excitations. For larger amplitudes, strong nonlinearities occur and the linear model is no longer predictive. Consequently, for a frustum-cone TLD subjected to harmonic excitations, a tuned mass damper (TMD) analogy is established where TMD parameters vary with the excitation amplitude. |
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