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Topics: Mixed finite element method for linear dynamic fluid-structure interaction problems with applications in engineering
 
Time: May 10-14, 2010
 
Lecuture：  9：00–12：00
Discussion: 13：30–16：00
 
Venue: F310, Mechanical Building A
 
Main contents:
 
1) Fundamental theory and formulations in continuum mechanics used in the formulation of fluid-structure problems. This includes tensor analysis, coordinate systems, basic laws governing continuum dynamics. Without this part of knowledge, the following lectures could not be followed, since the knowledge is used to model fluid-structure interaction systems. This part of lectures may be reduced according to the previous knowledge of students.
 
2) Governing equations to describe linear f-s interaction system. The pressure in fluids and the displacement in solids are used to model the f-s interaction system.
 
The system consists of air, liquid, and solid structure with free surface, which is subject to various dynamic loads: excitation body or surface forces in/on the structure, pressure waves under water, ground motion caused by earthquake etc. All governing equations are derived exactly following the knowledge given in 1).
 
3) Variational formulation to model the f-s interaction system.  The problem described in 2) now is formulated by a variational problem based which the finite element model will be developed.
 
4) Finite element model and substructure model.
 
Based on 3). we assume that the students have learnt the fundamentals of finite element method. Therefore, the details of common FEA knowledge will be neglected. The main concept on fluid-structure interactions in the model will be given, these include: symmetrical method for f-s interaction equations to use available solution software, frequency shifting technique, program flow chat etc.
 
5) Application examples: a) air-water-shell system: sloshing, dynamic response by earthquake. b) LNG tank-water interaction system subject pressure waves in the water, c) LNG storage tank subject to airplane impacts, d) Building - acoustic volume interaction system subject to human footfall impacts.
 
Professor Jingtang XING

Position: Professor of Applied Mechanics
Research interests:computational mechanics;fluid / acoustic-structure interactions;vibration & controls;sloshing dynamics;experimental dynamics;power flow analyses
 
Find More: //www.southampton.ac.uk/ses/people/staff/XingJT.html