Research On The Influence Of Communication Platform On The Modal And Overall Structure Strength Of Shared Tower

Reasonable use of existing power tower resources,adding communication base stations to transmission towers,to realize the sharing of power transmission and communication,is a novel technical solution(ie,sharing towers).At present,the complete technical specifications for the solution of adding communication base stations to transmission towers have not yet been unified.There are many types of power tower structures.Different forms of power towers can be connected to square,circular communication platforms or hoops.The location of external communication platforms is also available.Due to the corresponding space constraints,there is a lack of systematic research on the important dynamic parameters of the transmission tower after the communication base station is added—the modal,and the change of the overall strength of the tower.This paper focuses on the structural design of the communication platform,structural strength,modal changes of the steel pipe and angle steel transmission tower with different communication platforms,and the overall strength of the shared tower.The specific content includes: Considering the economic and structural premises.Next,two square and circular communication platforms suitable for steel tube towers and angle steel towers are designed,and the local structural strength simulation analysis of the communication platform with corresponding calculation loads is carried out using Workbench software.The calculation results show that the communication.The structural strength of the platform itself meets the requirements of design safety.The modal analysis of the shared iron tower is carried out on the installation of 8different height square and round communication platforms for the steel pipe tower and the angle steel tower.Due to the rigidity of the steel pipe tower itself,when the square and round communication platforms are installed at different heights,Its natural frequency and mode shape have little influence;while on the angle steel tower with low stiffness,when the installation height is high,its natural frequency change is not obvious,but when the installation height is low,the square and circular communication platforms are added.The natural frequency of the angle steel tower changes greatly;it shows that in the actual design project of the shared tower,the influence of the external communication platform on the angle steel tower modal must be considered.The optical three-dimensional dynamic measurement system was used to carry out modal test experiments on the angle steel tower model in the laboratory,and the installation of different height mass blocks on the angle steel tower model was carried out experimentally.It was found that as the installation height of the mass block increased,the angle steel tower.The natural frequency of the model is decreasing,and the size is gradually close to the natural frequency of the angle steel tower model without mass;this change law is consistent with the results of the finite element modal analysis of the angle steel tower.The main factor affecting the overall safety of the transmission tower is the wind load.After the communication platform is added,the changes in the overall wind load of the steel tube tower and the angle steel tower are calculated and analyzed;finally,the combined load under the control condition is applied to the corresponding various In the finite element model,the overall maximum axial stress of the steel tube tower and the angle steel tower and the maximum axial stress of the main material of the tower layer where the communication platform is located are obtained under different conditions.It is found that the steel tube tower and the angle steel tower plus the communication platform of different heights are overall.The change in the ultimate stress of the structure is not obvious.