Study on Transmission Characteristics of Integrated Shaft Vibration Isolation System in Transverse Vibration

摘要

In order to reduce the vibration transmission from the propeller to the hull, the integrated shaft vibrating isolating system is used to support the bearings, the propulsion devices and the auxiliary engines. To achieve the goals of vibration and noise reduction of the hull, the vibration energy is attenuated by changing the vibration transmission path of the coupling system. In this paper, the concept of the integrated shaft vibrating isolating system was put forward, the mechanical model of the shaft system was established. The dynamic characteristics of system's transverse vibration were analyzed by using analytic method and finite element method. Based on the displacement response at the bearing and force transmission rate, the vibration isolation effects of two different ways by traditional support and elastic support were compared and analyzed. The results show that the displacement response of the bearing under the whole elastic supported shaft system is smaller than the traditional support method. The integrated elastic support method reduces the vibration isolation effect by 10.9dB within 15 ～ 100Hz, and the effect of low frequency vibration attenuating is very evident. The feasibility of the design of integrated shaft vibration isolation system is verified. Therefore, a new method is put forward to design the vibration and noise reduction of the coupling system in the stern of the submarine.