大型绞吸式挖泥船定位钢桩插销孔应力及疲劳分析

对定位桩插销孔处的结构进行研究,分析插销孔的应力及疲劳问题。首先分析插销孔处易发生断裂的定位钢桩的结构形式,对销孔处的结构提出2种改进方案;然后,对2种改进的插销孔进行强度计算,根据计算结果并结合实际生产确定出较好的结构形式;最后,对改进后的销孔进行疲劳分析,得到其疲劳寿命,并指出最易发生疲劳失效的部位。

Stress and Fatigue Analysis of Spud Bolt Hole for Large Cutter Suction Dredger

In view of the existing situation that most of the current researches on spud of cutter suction dredger are focused on the whole body of spud, in this paper we make further research on the structure of bolt hole on spud specially. Our research focuses mainly on the problems of stress and fatigue of it. We first analyze the structure of spud that is easy to break around the bolt hole and put forward two projects to improve the mechanical property of bolt hole. The two types of improved bolt holes are given strength calculations and the better type is obtained according to the result. The difficulty of manufacturing is also taken into account. We also make fatigue analysis to the improved bolt hole. From this we obtain its fatigue life and point out the weakest part of it.