Analysis Of Wind-induced Vibration Response For Suspended Reticulated Shell Structure

Suspension reticulated shell structure is a new mixed hanging structure system,it is by an external lever arch by hanging up the main structure,and then later by the connection to the ground cable to secure it to form a stable overall composite structure.This structure,light weight,reduce the surrounding or internal support structure requirements,greatly enhance the demand for interior space,greatly reducing the construction cost.Since the structure is completely suspended properties,making it the action of wind generated for sensitive.But for some aspects of wind-induced vibration characteristics of the structure and practical wind-resistant design method of analysis conclusion at this stage it is not perfect.Therefore,understanding the impact of the suspension of reticulated shells and wind-induced vibration characteristics,and analysis of various parameters on the response and,finally,we put forward a more comprehensive and practical wind-resistant design method,so that it can be applied to practical engineering design opinions It is very important.By reading a lot of relevant literature,suspension reticulated shell structure wind vibration response of some theoretical basis of the analysis process that can be used,such as structural analysis of vibration characteristics,the basic characteristics of mean wind and turbulent wind,when the wind speed simulation,wind speed and air pressure conversion coefficient of wind load and wind vibration coefficient calculation,for a more systematic theoretical discussion and wind-induced vibration characteristics of the structure behind the further analysis of the foundation.Huludao Xingcheng to Bikini International Plaza hanging canopy of the background of the vibration characteristics of the structure were analyzed,the first 30 order to draw tables and graphs from selected natural frequencies acquired,and the first six-order intercept Figure modes,learned suspension reticulated shell structure relatively dense,chaotic vibration phenomena,along with the horizontal vibration and vertical vibration,there is a very special point of torsional vibration,vibration superposition need to look at multiple vibration modes.Vibration characteristics of the structure were parametric analysis system,master roof loads,while arch-sectional dimension,rod-sectional dimensions,cable force these parameters within a certain range,variation of structural vibration characteristics.Then,the AR method based on the theory,using MATLAB to simulate the structure and preparation of the overall level of fluctuating wind speed,which simulate the wind speed into pressure,in its analysis calculated by finite element analysis software ANSYS,and elected representatives from different areas of thestructure nodes and four bars,investigated the effect of different parameters on the above calculation results,the conclusions show that the influence of different parameters on the fly net shell structure is different,and in which the roof load cable force for wind response greater impact,and the impact lever arch sectional size and cross-sectional dimension is relatively not very obvious.Taking into account existing wind-resistant design specification does not apply to the suspension of reticulated shells,so hoisted vibration characteristics analysis of reticulated shell,calculate and analyze the structure of the combination of wind load factor before the finishing obtained by extracting the applicable overall wind load factor of the actual project,the basic completion of a more complete and practical wind engineering network shell structure is suitable for suspension,to provide reference for practical engineering design of future wind.