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起重机和一般的提升设备,在使用中几乎总是经受剧烈的循环载荷。许多零部件可能产生疲劳裂纹。因此,定期地检查起重机及其相连设备的疲劳裂纹的出现是很重要的,至少要凭直观或最好用非破坏性检验的方法来检查。
Cranes and general lifting equipment are almost always subjected to severe cyclic loads during use. Many parts may produce fatigue cracks. Therefore, it is important to periodically check the presence of fatigue cracks in cranes and their associated equipment, at least through intuitive or preferably nondestructive testing.