Fluid-structure interaction dynamics in fuel cellsaircraft vibrational analysis

1979 ◽  
Author(s):  
M. FERMAN ◽  
W. UNGER
Keyword(s):  
Fuel Cells ◽  
Fluid Structure Interaction ◽  
Vibrational Analysis ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction Dynamics

Wing Flutter Analysis Using Computational Fluid-Structure Interaction Dynamics

2021 ◽  
Author(s):  
Jeremy A. Pohly ◽  
Mike R. Zhang ◽  
Sijun Zhang
Keyword(s):  
Critical Speed ◽  
Fluid Structure Interaction ◽  
Computational Method ◽  
Fluid Structure ◽  
Aircraft Wings ◽  
Structure Interaction ◽  
Wing Flutter ◽  
Interaction Dynamics ◽  
Lifting Surfaces

Abstract Wing flutter plays a significant role in the performance and life of lifting surfaces such as aircraft wings. It is an instability that causes the wing to no longer be capable of damping out random vibration, and it occurs at the point called the critical speed. Currently, the determination of this critical speed poses a large challenge for aircraft designers, as there is no method that can quickly calculate the conditions that will cause the wing flutter instability. This paper presents wing flutter analyses using computational fluid-structure interaction dynamics. The computed results reveal the potential speed and accuracy of the computational method, which will allow designers to rapidly determine whether their vehicle will be capable of operating safely within its design envelope.

Fluid-Structure Interaction Dynamics for Laminated Plate\Shell Topology Optimization

2013 ◽  
Vol 444-445 ◽  
pp. 55-59
Author(s):  
Hong Ling Ye ◽  
Yao Ming Li ◽  
Yan Ming Zhang ◽  
Yun Kang Sui
Keyword(s):  
Topology Optimization ◽  
Integral Formula ◽  
Mass Matrix ◽  
Mathematical Formulation ◽  
Fluid Structure Interaction ◽  
Laminated Plate ◽  
Fluid Structure ◽  
Topology Optimization Problem ◽  
Structure Interaction ◽  
Interaction Dynamics

This paper focuses on Fluid-structure interaction dynamics for laminated plate\shell topology optimization. Based on ICM method, the filtering function of the element weight, the element mass matrix and the element stiffness matrix are established. Through Fluid-structure interaction boundary element integral formula, and Taylor expansion of Rayleigh quotient which is described by the filter function, the frequency constraint is approximately expressed as an explicit function and the mathematical formulation of the optimal problem refer to weight as objective and subject to multiple frequency constraints. Finally, the topology optimization problem is solved by dual sequence quadratic programming (DSQP). Numerical examples are provided to demonstrate the validity and effectiveness.

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