Influence of electromagnetic bearings on lateral vibrations and sound radiation of a shaft-hull system

Qin, Hui; Xie, Xiling; Zhang, Zhiyi

doi:10.1177/1475090219837408

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Caresta 23 used inertial actuators which are mounted at the prow to reduce the sound radiation of a submarine hull subjected to the lateral propeller forces. Qin et al 24,25 applied an auxiliary magnetic bearing to suppress lateral vibration transmission in a propulsion shafting system, and the numerical results show that the equivalent stiffness and damping of the support can be changed, resulting in reduced vibration and sound radiation of the hull. Zhu et al 26 proposed an AOS (Active Orthogonal Support) to suppress the lateral vibration transmission via the stern bearing in the shafting system.…”

Section: Introductionmentioning

confidence: 99%

Experiments on vibration transmission control in a shaft-hull system excited by propeller forces via an activemulti-strut assembly

Xie

Ren

Zhu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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The active control of lateral vibration transmission in a shaft-hull system with an active multi-strut assembly was investigated experimentally. The lateral vibration of the shafting system excited by the propeller forces transmits to the hull structure through the active multi-strut assembly, and the embedded actuator in each strut generates control forces to suppress vibration transmission. Modal testing was conducted and the characteristics of the hull structure were obtained. The excitation was exerted by two shakers mounted on the stern bearing housing. The performance of vibration suppression was verified for two control strategies that use three and six error transducers, respectively. Experimental results have demonstrated that the active multi-strut assembly in combination with the adaptive control method is able to suppress the vibration transmission from the shaft to the hull, and accordingly reduces the vibration of the hull surface. Moreover, the control strategy using six error transducers is of stronger cross coupling in the control channels as compared to that using three error transducers, which consequently makes it harder to implement active control.

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Section: Introductionmentioning

confidence: 99%

Experiments on vibration transmission control in a shaft-hull system excited by propeller forces via an activemulti-strut assembly

Xie

Ren

Zhu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part M:

Self Cite

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show abstract

“…As a result, active control becomes an attractive substitute for the passive one. Qin et al 9,10 conducted a theoretical research on magnetic bearings located near the stern bearing, which aims to reduce vibration transmission from the shaft to the hull. Simulation results show that the magnetic bearings are capable of changing the equivalent support stiffness of the shaft and increasing the transmission impedance.…”

Section: Introductionmentioning

confidence: 99%

Suppression of lateral vibration in a shafting system via an auxiliary active magnetic bearing with position control

Yang

Qin

Xie

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The bearings in a shafting system are important paths for the lateral vibration of the shaft to transmit to the hull structure and induce underwater sound. An auxiliary active magnetic bearing for suppressing the lateral vibration at the stern support of a shafting system is investigated. The active magnetic bearing situated close to the stern bearing generates electromagnetic forces to support the shaft, which decreases the contact stiffness as well as the friction between the shaft and the stern bearing and accordingly reduces the stern support acceleration. A dynamic model is established using the Timoshenko beam theory and Hamilton’s principle and the performance of the active magnetic bearing in vibration suppression of the shafting system is evaluated with position control. An experimental system is also built to verify the effectiveness of the active magnetic bearing. Numerical and experimental results have shown that the active magnetic bearing is able to suppress the stern support acceleration responses after the shaft is suspended by the active magnetic bearing. Moreover, the orbit of the shaft center is controlled as well.

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Restoring the stability of the rotor system by adjusting the radial clearance of the bearing

Zhang

2022

J Braz. Soc. Mech. Sci. Eng.

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Influence of electromagnetic bearings on lateral vibrations and sound radiation of a shaft-hull system

Cited by 5 publications

References 16 publications

Experiments on vibration transmission control in a shaft-hull system excited by propeller forces via an activemulti-strut assembly

Experiments on vibration transmission control in a shaft-hull system excited by propeller forces via an activemulti-strut assembly

Suppression of lateral vibration in a shafting system via an auxiliary active magnetic bearing with position control

Restoring the stability of the rotor system by adjusting the radial clearance of the bearing

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