游乐飞碟驱动半轴的疲劳寿命预测与试验研究

The Fatigue Life Prediction and Experimental Study of the Half Shaft of Amusement Flying Saucer

对游乐飞碟驱动半轴进行了疲劳寿命预测。运用ANSYS Workbench得到驱动半轴危险点的位置及该处的应力集中系数,设计相应的扭转试样,进行拉伸试验与扭转疲劳试验,得出材料的抗拉强度并修正材料的S-N曲线,进一步修正得出构件的S-N曲线,导入到NCODE软件中,结合设备满载与偏载载荷时间谱,通过小试样试验来实现对大型结构件的寿命预测。通过进行不同存活率P下疲劳寿命预测,得到在99%的存活率下,驱动半轴的疲劳寿命大概为2.9年。此数值可以作为游乐飞碟驱动半轴检修与更换的依据。

Fatigue life prediction was studied on thehalf shaftinside the amusement flying saucer. Investigate the location of dangerous point and the stress concentration factor by the ANSYS Workbench.The tensile tests and torsion fatigue tests were carried out to get the tensile strength and the S-N curve of the material.The modified S-N curve is imported into the NCODE software,and the life prediction of large structural parts is done by combining the full load and partial load time spectrum of the equipment and small sample test.The fatigue life prediction under different survival rates ofP shows that the fatigue life of the halfshaft is about 2.9 years under the survival rate of 99%.This data provides a reference for the maintenance and replacement of the flying saucer amusement.