| Membrane structure, with its beautiful appearance, convenient construction and many other advantages, has become the most representative architecture of 21st century; but its light, soft and other features makes the structure is very sensitive to wind loads, so studying the structure response under wind loads is of important theoretical and engineering significance. In the thesis, saddle-shaped structure which is the typical membrane structure is the research object, its CFD numerical wind tunnel simulation、analysis of the vibration characteristics and response under fluid-structure coupling is made. The main research contents and conclusions are as follows:(l)Research on CFD numerical wind tunnel simulation of the saddle membrane structure, also detailed comparative analysis the average wind pressure coefficient and characteristic of flow field. Results shows that the vertical lift force is very important for large-span membrane structure.(2)Shape analysis of the hyperbolic paraboloid and conical catenary structure which are the typical structures of space tensioned membrane structure. And based on the results of saddle-shaped structure, analysis different parameters on the impact of structural natural vibration characteristics such as the initial prestress, rise-span ratio and so on. The results show that the natural frequencies distribution is dense, the vibration of three directions are very prominent, and fluid-structure coupling is obvious. Among these various parameters, initial prestress and span have significant effects on natural frequency of structure and there exists a "optimal rise-span ratio".(3)Based on the coupling theory of ADINA, carry out the fluid-structure coupling numerical simulation of structure, and comparative analysis the structural response of one-way coupling and two-way coupling. Results shows the fluid-structure coupling response of cable-membrane structure can be analyzed using one-way coupled fluid-structure based on the weak coupling theory. |
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