船舶轴系高静低动扭振隔振装置结构设计及分析

Structural design and analysis of high-static-low-dynamic stiffness torsional vibration isolator for ship shafting

  • 摘要:
    目的 针对船舶轴系低频扭转振动抑制问题,设计并研制一种高静低动特性的扭振隔振装置。
    方法 首先,基于正、负扭转刚度并联的方式设计零部件,采用SolidWorks软件建立其三维模型,并通过3D打印制作隔振装置样机;然后,采用谐波平衡法求解模型的Duffing方程,以研究结构参数和激励幅值对隔振装置扭矩传递率的影响;最后,通过Ansys workbench软件对模型进行有限元仿真,并对样机进行静载扭转试验分析。
    结果 试验结果表明,隔振装置在静载扭矩试验下,在−2°~2°转角范围内具有高静低动刚度特性,且能承载大小为160 N∙mm的力矩;在合适的结构参数下,隔振装置相比线性隔振装置具有更好的低频隔振效果。
    结论 所提扭振隔振装置能通过正负刚度并联实现高静低动特性,可为船舶轴系低频扭转振动控制提供参考。

     

    Abstract:
    Objectives Aiming at isolating the low-frequency torsional vibration for ship shafting, a high-static-low-dynamic stiffness torsional vibration isolator is proposed and manufactured in this paper.
    Methods Firstly, the components based on the parallel connection of positive and negative torsional stiffness are designed, and the isolator model is built by the SolidWorks software, and it is manufactured through 3D printing. Then, the Duffing equation of the model is solved by using the harmonic balance, which aims to study the influence of structural parameters and excitation amplitude on the torque transmissibility of the isolator. Finally, finite element simulation is conducted on the model by using Ansys Workbench software, and static load torsion test analysis is conducted on the printed prototype.
    Results The static test results show that the vibration isolator has high-static-low-dynamic stiffness characteristic within the range of −2°~2°, and it can bear the torque of 150 N·mm. The torque transmissibility analysis verified that the vibration isolator had better low-frequency with appropriate structural parameters than that of the linear isolator.
    Conclusions The torsional vibration isolator achieves high-static-low-dynamic characteristics through parallel connection of positive and negative stiffness, which can provide reference value for low-frequency torsional control for ship shafting.

     

/

返回文章
返回