Abstract
This paper presents an analytical investigation of pneumatic effects in air-supported structures. The analysis applies only to volume-displacing modes of motion. The analysis includes the effects of pressure fluctuations on leakage flow rate and on the delivery flow rate of the fans used to ventilate and pressurize the building. These effects give rise to pneumatic damping which can become very large for large air-supported structures such as sports stadia; pneumatic damping can be significant even for smaller air supported structures. Pneumatic stiffness is important for virtually all air-supported structures. The relative importance of pneumatic stiffness and damping and of acoustic damping can easily be estimated for a specific structure by using information presented in the paper. The differential equation governing pneumatic effects could easily be incorporated into the dynamic analysis of an air-supported structure.
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