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用SQCE理论,对DBQ3000型塔机主臂杆母材非接头和接头部位存在的纵向闭合裂纹进行了分析计算,圆满地解决了先天性表面纵向闭合裂纹对塔机主臂杆强度和寿命的影响问题。对含裂纹构件的安全评定做了新的尝试。
Using SQCE theory to analyze and calculate the longitudinal closed crack existing in the non-joint and joint part of the main boom of the main boom of DBQ3000 tower crane, and satisfactorily solved the influence of congenital longitudinal longitudinal crack on the strength and life of the main boom of tower crane problem. A new attempt was made to evaluate the safety of cracked components.