Aerodynamic unstable critical wind velocity for three-dimensional open cable-membrane structures
- Resource Type
- Original Paper
- Authors
- Wei, De-min / 魏德敏; Zhu, Mei-ling / 朱美龄; Li, Di / 李 頔
- Source
- Applied Mathematics and Mechanics: English Edition. March 2011 32(3):277-284
- Subject
- open cable-membrane structure
critical wind velocity
vortex lattice method
TU351
74K10
74D05
- Language
- English
- ISSN
- 0253-4827
1573-2754
The aerodynamic unstable critical wind velocity for three-dimensional open cable-membrane structures is investigated. The geometric nonlinearity is introduced into the dynamic equilibrium equations of structures. The disturbances on the structural surface caused by the air flow are simulated by a vortex layer with infinite thickness in the structures. The unsteady Bernoulli equation and the circulation theorem are applied in order to express the aerodynamic pressure as the function of the vortex density. The vortex density is then obtained with the vortex lattice method considering the coupling boundary condition. From the analytical expressions of the unstable critical wind velocities, numerical results and some useful conclusions are obtained. It is found that the initial curvature of open cable-membrane structures has clear influence on the critical wind velocities of the structures.