驶入式钢货架结构整体稳定研究

发布时间：2018-04-01 02:35

本文选题：驶入式货架　切入点：稳定机理　出处：《南京工业大学》2015年硕士论文

【摘要】：驶入式货架作为高存储密度的货架结构,得到了广泛的应用。与横梁式货架结构相比,驶入式货架缺少横梁,稳定问题比较突出,国内已出现了多起驶入式货架倒塌事故。因此,有必要对驶入式货架结构整体稳定进行深入细致的研究,为货架设计提供参考,使得货架结构更为安全、经济、合理。本文主要研究工作如下：(1)采用ANSYS有限元软件建立了驶入式货架结构三维有限元模型,并对其进行了特征值屈曲分析以及考虑初始缺陷的非线性屈曲分析,结果表明后者是计算货架整体稳定承载力的较为准确的方法。(2)根据驶入式货架结构的组成特征,对货架结构的稳定机理进行了深入分析,结果表明货架背部垂直支撑及顶部水平支撑对整体稳定具有非常重要的作用。货架背部垂直支撑与立柱相连接,形成几何不变体系,保证了货架背部立柱的稳定性,并为货架体系提供了整体纵向刚度,顶部水平支撑可以在货架背部几何不变体系的基础上传递不动点的作用,限制货架失稳时发生的侧移,以提高驶入式货架整体稳定性。(3)分析了可能影响驶入式货架稳定性的参数的影响规律,获得了以下主要结论：背部垂直支撑是货架体系纵向整体稳定性的根本保证,顶部横向水平支撑和紧靠货架背部的纵向水平支撑组合设置是经济合理的顶部水平支撑布置方式；货架层高、深度方向货格个数、立柱截面惯性矩、顶部水平支撑截面积、柱脚转动刚度是驶入式货架整体稳定的主要影响因素；驶入式货架结构的整体稳定性对几何初始缺陷较为敏感,随着几何初始缺陷的增大,极限承载力显著下降；在货架货物存储过程中,应尽量避免出现货物偏载的情况,确保货架使用过程的安全。(4)基于回归分析的思想,利用参数分析得到的数据,拟合了驶入式货架结构稳定承载力的简化计算公式,可供工程实际应用参考。
[Abstract]:As a high storage density shelf structure, carrier-in shelf has been widely used.Compared with the cross-beam shelf structure, there is a lack of crossbeam and the stability problem is prominent. There have been many collapsing accidents in China.Therefore, it is necessary to conduct a thorough and meticulous study on the overall stability of the stealing-in shelf structure in order to provide a reference for the shelf design and make the shelf structure safer, more economical and more reasonable.The main research work of this paper is as follows: (1) A three-dimensional finite element model of an entry shelf structure is established by using ANSYS finite element software, and the eigenvalue buckling analysis and nonlinear buckling analysis considering initial defects are carried out.The results show that the latter is a more accurate method to calculate the overall stable bearing capacity of shelves.The results show that the vertical support and the top horizontal support play an important role in the overall stability.The vertical support of the back of the shelf is connected with the column to form a geometric invariant system, which ensures the stability of the column on the back of the shelf, and provides the overall longitudinal stiffness for the shelf system.The top horizontal support can transfer the effect of the fixed point on the basis of the geometric invariant system on the back of the shelf, and limit the lateral shift of the shelf when it is unstable.In order to improve the overall stability of the carrier-in shelf, this paper analyzes the influence law of the parameters which may affect the stability of the carrier-in shelf, and obtains the following main conclusions: the vertical support of the back is the fundamental guarantee of the overall longitudinal stability of the shelf system.The combination of horizontal support at the top and vertical support close to the back of the shelf is an economical and reasonable arrangement of horizontal support at the top, the height of the shelf layer, the number of the cargo boxes in the depth direction, the moment of inertia of the section of the column, the cross-sectional area of the horizontal support at the top.The rotation stiffness of the column foot is the main factor influencing the overall stability of the stealing-in shelf, and the overall stability of the stealing-in shelf structure is sensitive to the initial geometric defects, and the ultimate bearing capacity decreases significantly with the increase of the initial geometric defects.In the storage process of goods on the shelf, we should try to avoid the situation of the partial loading of goods, and ensure the safety of the shelf use process. (4) based on the idea of regression analysis, the data obtained from the parameter analysis should be used.The simplified formula for calculating the stable bearing capacity of the steel-in shelf structure is fitted, which can be used as a reference for practical application.
【学位授予单位】：南京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU391

【相似文献】