风 洞 试 验 模 型 振 动 机 理 及 主 动 控 制 研 究 进 展

Undesirable model vibration often occurs in a conventional wind tunnel force test. Large amplitude model vibrations may adversely affect test data and even threaten the safe operation of equipment. It is therefore of great importance to fully understand the mechanism of model vibration occurrence and reduce the vibration amplitude by effective means in wind tunnel tests. This paper first introduces the harms of model vibration, followed by a summary of model vibration types. The progress of reducing model vibrations by various methods are then presented, and the key points and technical difficulties involved in the active control method analyzed. The existing literature shows that the active control method with the piezoelectric stack as the actuator can best meet the requirements of the engineering practice, with better vibration damping effect than others. Finally, suggestions regarding future research on model vibration control in large-scale wind tunnels are presented.