球铰接杆式支撑臂构型参数分析

Configuration Parameter Analysis for ADAM-type Articulated Mast

论述了球铰接杆式支撑臂的组成和主要构型参数。利用有限元分析软件建立了球铰接杆式支撑臂有限元模型,进行了模态分析并与试验结果进行了对比,验证了模型的正确性;分析了单元段跨距、套筒半径、横向框架边数和斜拉索预紧力对支撑臂性能的影响。结果表明单元段跨距的增加有利于支撑臂总体性能的提升,而套筒半径和横向框架边数的增加能提高支撑臂刚度但同时增加了系统总质量。斜拉索预紧力应从最小允许预紧力和球铰取得最大刚度值时对应的预紧力中选取较大值。分析结果为支撑臂的工程设计提供了依据。

The configuration of ADAM-type articulated mast was described, and main configuration parameters were chosen. Finite element models of the ADAM-type mast were built up by ANSYS. Using these models, mode analysis was carried out. By comparing the analysis results with experiment results, the correctness of the finite element models was validated. The effects of bay length, canister radius, cross-section side and preload of the diagonal cables on the performance of the mast were analyzed. The analysis results show that the performance can be improved by increasing the bay length. The bending stiffness and mass of the mast will be promoted as the canister radius increases. The preloads of the diagonal cables should be selected between the allowable minimum value and the value corresponding to the situation when the ball sockets obtain maximum stiffness. These conclusions could be applied in mast engineering design.