塔器防振用声波扰流器的实验研究

Experimental study on vibration control of columns via sound wave disturbers

随着化工设备大型化的发展,塔器的风诱导振动现象日益引起人们的广泛关注。针对此问题,设计了一种新型的扰流减振装置,即正弦声波扰流器,并依据涡致振动理论对声波的扰流减振原理进行了分析。对设计的扰流器进行了风洞实验,研究了扰流器的参数变化对扰流效果的影响。结果表明:声波扰流器能够有效减振,其原理是声波干扰使得漩涡脱落频率降低并且脱落的漩涡由单一频率变成多频混杂状态,破坏了共振锁定现象;声波扰流器的安装高度和数目增加,减振效果增强;扰流器的频率和波动速度在一定范围内增加,减振效果增强。研究结果为塔器防振措施中扰流器的设计与工程应用提供了参考和依据。

As the development of large-sized chemical equipment,it arouses much concern for the wind induced vibration of columns. Designed a sinusoidal sound wave disturber,the vibration control principle of the disturbers was analyzed based on the theory of vortexes induced vibration. The wind tunnel experiment was carried out to study the influence of the parameters of the disturbers on the wind induced vibration. The result shows that the sinusoidal sound wave disturbers are effective to reduce the wind induced vibration; the vortex shedding frequency is reduced by the sound wave and multi-frequency vortexes are formed instead of single frequency vortexes due to the disturbers; it is an effective way to increase the number and the installation height of the disturbers; it is advisable to increase the frequency and fluctuation velocity of the disturbers within a proper range. This work may offer the reference for research on the wind induced vibration control of chemical columns.