船舶垂直推進系統疲勞壽命研究

A STUDY ON FATIGUE LIFE OF MARINE VERTICAL PROPULSION SYSTEM

本研究針對Voith 21gs-mc-1600垂直俥葉採水平式環流水槽，模擬俥葉水中受力情形，再以ANSYS數值模擬方式計算俥葉可能金屬疲勞引發故障可能時間。實驗結果顯示，Voith 21gs-mc-1600垂直俥葉於經濟速率以上行駛對於金屬疲勞產生採非線性成長，採速率平均使用方可維持艦艇30年以上壽命，供企業於艦艇壽期末端整體投資規畫參考。

In this study, the horizontal circulation model basin is utilized to simulate the force on the Voith 21gs-mc-1600 vertical propeller in the water, followed by calculating the possible failure time of the blade due to metal fatigue by means of ANSYS numerical simulation. The results show that the metal fatigue of the Voith 21gs-mc-1600 vertical propeller grows non-linearly when the ship is travelling above the economic speed. Only travelling at all speed evenly can maintain the service life of the ship for more than 30 years. This can be used as investing and planning reference when the ship comes to the end service life.