门座起重机小拉杆裂纹及寿命估计

On crack in the stay bars and life estimation of portal crane

论述了门座起重机小拉杆的裂纹形成机理 ,并给出了其正常工作寿命以及因安装误差导致的工作寿命降低系数的计算方法。该方法对传统的计算是一个较重要的改进。

This paper discusses the causes of emergence of crack in stay bars,and presents methods of determining normal life of portal crane and the reduced life due fo fixing errors.