Numerical modelling of tuned liquid damper | |
| Author | Wang, Yuzhu |
| Call Number | AIT Thesis no. ST-93-31 |
| Subject(s) | Vibration Vibration |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | In this study a TLD-container model is established and tested by comparing with the experiment data. A fluid element is developed for the idealization of two-dimensional coupled fluid-solid system subjected to dynamic loading, based on a displacement formulation. To simulate the boundary condition of fluid and solid domain, a contact element is employed on the inte1face between the fluid and the structure. This ensures that compatibility and equilibrium of interacting forces will be satisfied automatically along the interface of the coupleµ system. In order to suppress circulation modes, an irrotational constraint is introduced by a penalty function method. To prevent volumetric locking of the fluid element due to excessive bulk modulus, reduced integration is used when computing the element stiffness matrix contributed by the fluid. The eigenvalue analysis of the fluid element is performed, and the frequency convergence is also tested In the analysis of dynamic response of the coupled system, the Newmark implicit time integration method is used. The Rayleigh damping of fluid is assumed, with the damping ratio being calibrate from experiment. From the analysis we can also conclude that for a large sloshing amplitude under continuous excitation at or near the resonance frequency of the liquid oscillation, the linear theory becomes inadequate and the nonlinear dissipation theory should be used. For small sloshing amplitude, the numerical result shows very good agreement with the experiment one. |
| Year | 1993 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Worsak Kanok-Nukulchai ; |
| Examination Committee(s) | Sugiyama, Toshiyuki ;Pennung Warnitchai |
| Scholarship Donor(s) | German Academic Exchange Service (DAAD); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |