船用轴推力轴承减振器的设计

Saeed Soheili, Poorya Ghasemizadeh, E. Hosseini
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引用次数: 0

摘要

船舶推进轴系的振动可能会带来严重的问题,并且已经进行了许多努力来减轻这些振动。当螺旋桨叶片在非均匀尾流中旋转时,由于推力的微小变化,螺旋桨振荡会导致推进轴系的纵向振动。这些振荡可以通过船舶的推力轴承传递到船体。本文采用FRF分解法对推进轴系进行建模。比较了MATLAB Simulink软件中系统的数值解,以及FRF方法的分解;表明数值解的误差小于4%。为了减少传递到船体的振动,采用了古德温谐振变换器(RC)。采用优化方法对RC的刚度、阻尼和质量系数进行了优化。结果表明,如果选择合适的系数,船体中传递的振动可以减少99%。
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Design of vibration reducer for thrust bearing of marine shaft
of marine propulsion shafting system may bring serious problems and many efforts have been performed to mitigate theses vibrations. Propeller oscillations due to the small variations of thrust, when the propeller blades rotate through the non-uniform wake, result in the longitudinal vibrations in the propulsion shafting system. These oscillations can be transmitted to the hull through the thrust bearing of the vessel. In this study, the propulsion shafting system is modeled with the decomposition of FRF method. The comparison between the numerical solution of system in MATLAB Simulink software, and the decomposition of FRF method; shows that the numerical solution has less 4 percent error. In order to decrease the transmitted vibrations to the hull, Goodwin Resonance Changer (RC) is utilized. An optimization method is used to optimize the RC’s stiffness, damping and mass coefficients . The results show that if the appropriate coefficients are selected, the transmitted vibrations can be reduced up to 99 percent in the hull.
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