离心状态下吊篮系统有限元模拟

目的研究吊篮在离心载荷下的力学行为,尤其是强度和刚度性能。方法通过精细化模拟吊篮系统各部件间的接触关系,在对某离心机吊篮初始设计方案进行模拟分析的基础上,开展吊篮的强度性能研究,对吊篮结构的整体布局、主要部件强度考核和降低局部应力集中等多方面开展计算分析。结果在指定工况下吊耳与配重板之间的局部接触导致的应力集中,致使安全系数达不到强度要求。结论提出改进措施,改进设计后的吊篮结构强度得到了较大的提高,满足吊篮设计的强度要求。

Finite element analysis of centrifuge baskets in the centrifugal state

Objective To study mechanical behaviors of the suspended basket, especially the strength and stiffness performance under the centrifugal loading. Methods By precisely modelling the contact relations between parts of the basket, the present paper established a finite element model based on an initial design of centrifuge baskets. Special emphasis was placed on a systematic study of the strength property of centrifuge baskets. Calculation and analysis were performed to check the overall structure, the strength of key parts and the reduction of local stress concentration. Results Certain stress concentration existed due to local contact between the lifting lug and the bob-weight, leading to the result that the safety parameters failed to meet requirement on strength. Conclusion An improved design is provided with higher structual strength, which satisfies the corresponding mechanical strength requirements.