The invention relates to a method for changing the inherent frequency of an underwater residence system to suppress vortex-induced oscillation, and belongs to the field of underwater vortex-induced oscillation suppression. The method comprises the steps: establishing a residence system underwater, wherein the system comprises an underwater mooring body, a suspension cable, a hoisting mechanism, anacceleration sensor, a controller and an anchor block, the length of the suspension cable is adjusted through the hoisting mechanism, the frequency domain characteristics of movement of the underwater mooring body are obtained through Fourier analysis of acceleration signals of the underwater mooring body, vibration signals caused by hydrodynamic force are decoupled through inherent frequency calculation, the water flow speed is obtained, and the inherent frequency of a system is adjusted through a vortex-induced oscillation suppression interval obtained through derivation, and the purpose ofsuppressing vortex-induced oscillation is achieved.
本发明涉及一种改变水下驻留系统固有频率抑制涡激振荡的方法,属于水下涡激振荡抑制领域;在水下建立驻留系统;包括水下系留体、悬索、卷扬机构、加速度传感器、控制器和锚块;采用卷扬机构调节悬索长度,通过水下系留体加速度信号的傅里叶分析获得其运动的频域特征,通过固有频率计算对水动力导致的振动信号进行解耦,得到水流速度,使用推导得出的涡激振荡抑制区间调节系统固有频率,达到抑制涡激振荡的目的。
Method for changing inherent frequency of underwater residence system to suppress vortex-induced oscillation
一种改变水下驻留系统固有频率抑制涡激振荡的方法
2021-03-19
Patent
Elektronische Ressource
Chinesisch
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