摘要
目的分析双吊点大跨度作业平台力学结构,确定在2倍工况下平台的危险位置及最大变形位置.探讨大跨度平台结构的设计理论,为大跨度平台的实际应用提供计算依据.方法根据实际情况设计大跨度作业平台结构图,基于ANSYS建立其有限元模型,并根据平台的设计参考标准及实际应用确定分析工况,进而对平台静态进行分析,计算作业平台在两种结构两种工况下的应力强度和结构变形,对其进行分析比较.结果 ANSYS静态分析得出的两种结构均满足设计要求,具有加强杆结构与不具有加强杆结构,额定载荷下最大应力值相差为2.769 MPa、最大变形相差为2.376 mm.同时得到两端垂直安装架与平台连接杆件位置是应力最大处,易发生断裂破坏.结论大跨度作业平台满足工程设计力学性能要求,实际中可以省略平台中副加强杆结构,在满足平台结构强度的要求下进一步减轻平台自质量,为结构优化设计提供方案.
The research has been conducted on mechanical structure of large-span platform for determining the risk positions and deformed position of platform in 2 times rated load. In order to provide the basis of calculating of large-span platform, the researchers study the structural design theory on practical applications. The structure of large-span platform is designed based on the actual case, using ANSYS to establish the finite element model, determining the analysis conditions based on reference standards of platform in the design and practical application. And thus the stress intensity and structural deformation of the static platform are analyzed in both structures of the two conditions. The comparison of the results shows that two structures are able to meet the design requirements. Compared these two structures which one is with strengthen sticks and the other is without the strengthen sticks, the obtained maximum stress difference is 2. 769 MPa and the maximum deformation difference is 2. 376 mm in rated load. At the same time, the maximum stress position has been found at the connecter point between platform and the vertical install position, prone to fracture damage. The results show that the designed large-span platforms can meet the requirements of the mechanical properties of engineering design. In the actual case, strengthen sticks can be omitted for reducing the selfweight of the platform. This research has provided method for the structural optimization.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2012年第2期344-349,共6页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家十一五科技支撑计划项目(2008BAJ09B03)
沈阳建筑大学省级重点实验室开放基金项目(JX-200903)
关键词
大跨度
作业平台
ANSYS
静态分析
large-span
suspended access platform
ANSYS
static analysis
