Suppression of torsional vibration by a sectored hollow rotor containing liquid

在旋转机械中，通常发现激励转矩以与转速相同的频率或以转速的倍数发生。未调谐的减振器。如兰开斯特丹伯，经常用于减少扭转振动。然而，它不如动态吸收器有效。如果附加的动力吸收器具有与激励频率相同的固有频率，则振动被抑制。离心摆式减振器如果调得好，可以有效地消除扭转振动。然而，有时由于摩擦或调整不足而不能令人满意地运行。我们已经通过实验证明，通过附加一个部分充满液体的空心圆柱体可以抑制扭转振动。空心圆柱体被径向壁分割成相同的腔室。调整条件，如水量，腔室的高度和扇形的数量，进行了检查。在不考虑科里奥利加速度项的情况下，基于t…More理论的无粘液体微扰解与实验结果吻合较差。本文通过实验和理论研究了通过附加部分充液的空心圆柱体抑制转子扭振的方法。空心圆柱体被径向壁分成相同的扇形。除了测量扭转振动外，还拍摄了表面波以观察所含液体的运动。试验空心气缸的分区数为2、3、4、6、8。对灌装定量的调整条件也进行了研究。实验结果表明，表面波向后移动，即沿与旋转相反的方向传播。给出了包含科里奥利加速度项的分析。分析结果与实验结果吻合较好，而不含科里奥利项的分析结果吻合较差。因此，由于液体运动时的科里奥利力作用，表面波运动不是静止的。少

In rotating machinery, it is generally found that exciting torque occurs at the same frequency as the rotating speed or at multiples of the rotating speed. An untuned vibration damper. such as the Lancaster damber, is frequently used to reduce torsional vibrations. However, it is not as effective as a dynamic absorber. If an attached dynamic absorber has the same natural frequency as the exciting frequency, vibration is suppressed. A centrifugal pendulum vibration absorber effectively eliminates torsional vibrations if it is well tuned. However, it sometimes does not operate satisfactorily due to friction or insufficient adjustment.We have shown experimentally that torsional vibrations can be suppressed by attaching a hollow cylinder partially filled with liquid. The hollow cylinder is sectored into identical chambers by radial walls. Tuning conditions, such as the amount of water, the height of chambers and the number of sectors, were examined. The perturbation solution based on the t … More heory for inviscid liquid disregarding the Coriolis acceleration terms shows poor agreement with experiment.An The experimental and theoretical study is performed on suppression of torsional vibrations of a rotor by attaching a hollow cylinder partially filled with liquid. The hollow cylinder is divided into identical sectors by radial walls. In addition to measuring torsional vibration, surface waves were photographed to observe the motion of the contained liquid. The number of divisions of tested hollow cylinders is 2,3,4,6 and 8. The tuning conditions for fill rations are also examined. Experimental results show that the surface waves move backward, that is, travel in the direction opposite the rotation. Analysis including the Coriolis acceleration terms is presented. Analytical results show good agreement with the experimental ones whereas the analysis without Coriolis terms shows poor agreement. Accordingly, the surface wave motion is not stationary due to the Coriolis force which acts while the liquid moves. Less