30万吨FPSO机舱防振设计方法

Anti-vibration design method for 300 000 DWT FPSO engine room

    摘要
  • 摘要:
      目的  振动是影响船舶工作人员舒适度的重要因素，随着船东对舒适性要求的日益提高和相关规范的日益严格，船舶防振设计受到越来越多的重视。
      方法  借助广泛应用于船舶振动分析和防振设计的模态叠加法开展相关研究。首先，对模态叠加法进行分析，总结得到控制振动激励源输出载荷和错开激励频率与固有频率的防振设计方法；然后，使用有限元法对某30万吨浮式生产储卸油装置(FPSO)进行振动分析，并分别采用2种方法进行防振设计；最后，选择合适的方法运用于该30万吨FPSO。
      结果  实船测试结果表明，所提防振设计方法可使该30万吨FPSO的振动响应满足ISO 20283-5的要求。
      结论  研究成果对船舶防振设计具有一定的参考价值。

     

    Abstract:
      Objectives  Vibration is an important factor which influences the comfort level aboard ships. With the higher requirements from ship owners and stricter criteria, ship vibration control is receiving increasing attention.
      Methods  This paper use the modal superposition method which is widely used in ship vibration analysis and anti-vibration design to carry out relevant research. First, analyzes the characteristics of the modal superposition method, then summarizes anti-vibration design methods by controlling the vibrational excitation output and staggering the excitation frequency and natural frequency. Finally, staggering the excitation frequency and natural frequency is applied as the anti vibration design method for the vibrational control of a 300 000 DWT floating production storage and offloading (FPSO) unit.
      Results  The results of the ship test show that after applying anti-vibration design method, the vibration response level of the 300 000 DWT FPSO meet the requirements of the ISO 20283-5 standard.
      Conclusions  The research results of this paper have a certain reference value for the anti-vibration design of ships.

     

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