| Author | Vanissorn Vimonsatit |
| Call Number | AIT Thesis no.ST-87-34 |
| Subject(s) | Structural dynamics
Finite element method
|
| Note | A thesis study 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 | A formulation of an algorithm to solve three dimensional vibration
of a multilayered isotropic elastic half space subjected to external
excitation on a circular embedded bar is presented in this study. The
half space is taken as consisting of a near field and a far field. The
near field consisting of the cylinder and a finite region of the half
space around it is modelled by conventional finite elements, while the
far field covering t he rest of the half space is discretized into
horizontal infinite elements and radiating infinite elements. Each
element is divided such that it is homogeneous through its volume and
having the nodes only at the interface between t he discretized near
field and the far field. The displacement interpolation functions
satisfy all requirements for compatibility and completeness, and are
classified into three sets: (1) to represent t he node on the surface of
the half space , (2) to represent the node on each interface of two
materials and (3) to represent the node inside each homogeneous domain.
Corresponding to these three displacement sets, the infinite elements
can be classified into three types: (1) surface infinite element which
is at the surface of the half space, (2 ) interface infinite element
where a horizontal surface of this element is t he interface of two
materials and (3) homogeneous infinite elements which are inside each
homogeneous domain. The impedance matrix of each of these infinite
elements is presented and shown that the infinite integrals appearing
in the matrix can be analytically integrated. The proposed algorithm
should prove to be very efficient and accurate in computation, since its
formulation is based upon rationale and all major analytical
requirements. |
| Year | 1987 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Karasudhi, Pisidhi
|
| Examination Committee(s) | Hasegawa Akio ;Worsak Kanok-Nukulchai
|
| Scholarship Donor(s) | The French Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1987 |
