| Author | Munasinghe, H. M. Sunil |
| Call Number | AIT Thesis no.ST-94-17 |
| Subject(s) | Damping (Mechanics)
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | In this study an Arbitrary Lagrangian-Eularian (ALE) finite element formulation for
calculation of large amplitude sloshing wave in a TLD-tank model, is developed, for 2-node and
4-node fluid elements.
The ALE method serves to over come difficulties encountered in both pure Lagrangian and
pure Eula1ian approaches. This formulation leads to an easy and accurate treatment of fluid-structure
interaction and its mesh re-meshing and re-zoning permits large fluid sloshing without producing
excessive distortion of the fluid finite element mesh.
A three phase procedure was employed in ALE module, namely the Lagrangian procedure,
re-meshing procedure and re-zoning procedure. In the Lagrangian procedure, pressure and velocity
fields are calculated based on the Lagrangian description. In the re-meshing procedure, a new mesh
is f 01med and the calculated results of pressure and velocities in the Lagrangian phase are transfo1med
to adapt to the new mesh.
The ALE fo1mulation was tested for two models of tuned liquid dampers (TLD) under
continuous excitations, and free oscillation followed by forced excitation. The stability of the
numerical time integration was investigated for different size of time steps. The deformation of the
finite element mesh was also observed.
The ALE module developed in this study, to analyze the large free surface motions involving
liquid filled tanks (TLD), gives satisfactory result by choosing appropriate size of time steps. A
critical discussion of the results was included, with suggestions for future improvement of the
algorithm. |
| Year | 1994 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Worsak Kanok-Nukulchai |
| Examination Committee(s) | Pennung Warnitchai ;Jiaru, Qian
|
| Scholarship Donor(s) | Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1994 |