Mobile Crane Fatigue Damage Assessment Device, Fatigue Damage Assessment Program and Fatigue Damage Assessment Method

摘要

PROBLEM TO BE SOLVED: To provide a fatigue damage evaluation device capable of accurately evaluating fatigue damage of a component of a mobile crane. A fatigue damage evaluation device AA includes a moment measuring device 41 for measuring a lodging moment acting on a boom, a turning angle measuring device 42 for measuring a boom turning angle, a moment measuring device 41, and a turning angle measuring device 42. It is provided with a calculation device 40 for inputting the measured value of. The computing device 40 is a stress amplitude ratio which is a ratio of the fluctuation range of the stress generated in the evaluation target site to the rated stress total amplitude for each operation from the ground cutting to the landing of the suspended load based on the measured values of the lodging moment and the turning angle. Is obtained, the one-work fatigue damage value is obtained from the stress amplitude ratio, and the one-work fatigue damage value in a predetermined period is integrated to obtain the cumulative fatigue damage value. [Selection diagram] FIG. 5