疲劳荷载通常是一复杂的随机过程,为了确切地计算疲劳寿命,就必须掌握其变化规律。吊车梁疲劳荷载分析在实际生产过程中,吊车经常不满负荷运行,即使起重量达到了额定值,小车也不常在极限位置,所以对吊车梁受力来讲,不可能经常受到计算最大荷载的作用。随着小车起吊重物大小的不同,小车在大车上位置的不同,以及大车在吊车梁上位置的不同,吊车梁所受的应力(或应力幅)有大有小,但绝大部分均小于计算应力(或应力幅)。由于 The fatigue load is usually a complex random process. To accurately calculate the fatigue life, it is necessary to grasp the law of change. Analysis of crane beam fatigue load In the actual production process, the crane is often under-loaded. Even if the lifting capacity reaches the rated value, the trolley is not always in the limit position. Therefore, the crane beam cannot always be subjected to the calculation of the maximum load. With the difference in the size of the trolley’s lifting weight, the difference in the position of the trolley on the cart, and the difference in position of the cart on the crane beam, the stress (or stress amplitude) on the crane beam is quite different, but most Both are less than the calculated stress (or stress amplitude). due to