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一、引言在迄今为止的起重机设计中,一般都是以动载系数的方式考虑结构由于振动而产生的应力的增大,计算形式如下:式中 L——由起升载荷产生的应力; E——由起重机本身质量重力产生的应力;
I. INTRODUCTION In the crane design so far, the stress of the structure due to vibration has generally been considered in the form of dynamic load factor. The formula is as follows: where L is the stress caused by hoisting load, E - the stress caused by the gravity of the crane itself;