Support joint of cable dome structure and machining method

Abstract

The invention discloses a support joint of a cable dome structure and a machining method. The machining method comprises the steps of using three-dimensional mechanical design software for modeling an original node model, and obtaining a first file; importing the first file into finite element analysis software for topological optimization, and finally performing facet repairing and merging on a topological optimization result to obtain a second file with the topological optimization result; importing the second file into instant simulation software to carry out rapid smoothing processing on an optimization result; manufacturing the outer contour of the joint by using an evanescent mode, and filling and leveling up the hole characteristics in the joint model to obtain a foam model; brushing the foam model with an alcohol-based coating, and filling the foam model with organic ester sodium silicate sand to make a sand mold; and destroying the foam model and gasifying to form a cavity, inputting the mold core into the cavity, and performing mold closing and pouring after coating is brushed. According to the support joint manufactured through the machining method, the dead weight of the joint is reduced, and the safety and stability of the joint are improved; meanwhile, the support joint is clear in force transmission route and reasonable in stress form.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, in particular to a support node for a cable dome structure and a processing method. Background technique [0002] The cable dome structure is a full-tension system with extremely high structural efficiency. It is favored by engineers because of its light structure, ingenious conception, reasonable force, and ability to cover a large space. It has become a hot spot in the research of space structures at home and abroad in recent years. one. The support node is an important part of the cable dome structure, because the cable dome structure connects multiple cables at the support node, and there are many cables at the same node, and the stress is large. If the node is damaged, the entire structure will inevitably fail. . Therefore, having a support node with good mechanical properties, light weight, and safety and reliability at the same time has a direct impact on ensuring the sa...

AI Technical Summary

Problems solved by technology

At present, in order to avoid the residual stress of the weld and make the structure safer, most of the support nodes of the cable dome structure are cast steel nodes, but in actual engineering design, most of the nodes are still developed by engineers based on experience A model, and then undergo verification analysis, and then optimize and adjust the cyclical process. This method is not only time-consuming and laborious, but the final result is usually not ideal. The stress of the support nodes is still unevenly distributed, and the self-weight is still large, which affects the structure. safety and stability, but also increases the difficulty of on-site installation

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