Finite Element Digital Model Of High-rise Structure And UAV Detection Path Optimization

High-rise structures have various forms and usually gather in the form of building groups,which makes it very difficult to carry out safe and efficient detection after disasters,and there are few related researches on detection methods for post-disaster high-rise structures.This thesis proposes a finite element digital model of high-rise structures,and takes the detection of high-rise structures after the El Centro earthquake as an example.The detection scheme is applied to real high-rise structures.The main research contents of this paper are as follows:(1)Firstly,the finite element model of the target high-rise structure is established,through modal analysis,response spectrum analysis and elastic time history analysis to ensure that the target high-rise structure meets the requirements of "no damage under small earthquake",and then the nonlinear time history of the high-rise structure under the action of El Centro earthquake is used.Taking the analysis as an example,the weak area of the high-rise structure is analyzed through the maximum harmful interstory drift of the floor and its corresponding stress nephogram,and finally the weak area of the high-rise structure is determined as the middle and lower floors.(2)Firstly,it is necessary to use the finite element model to establish the structural components of the finite element digital model of the target high-rise structure,extract the finite element node and mesh information through the SAP-python interface,and then use the Blender-python interface to import the above information to generate the finite element digital model of the high-rise structure.structural member.Then,the non-structural components of the finite element digital model of high-rise structures are established through interface operations,and the structural and non-structural components are combined to obtain a complete finite element digital model of high-rise structures.Then texture and color the digital model,and use FID,PSNR and SSIM as indicators to obtain the best combination of texture components for high-level structures,that is,the combination of base map,displacement map,normal map and roughness map.Finally,the weak areas are determined according to the finite element analysis results,and the potential damage locations are marked on the finite element digital model of the high-rise structure in the form of crack textures,which provides an experimental environment for the subsequent detection of UAVs in the digital environment.(3)Taking into account the influence of satellite signals,wind speed and light on detection of drones,the flight path around the high-rise structure,as well as the flight path parallel to the damaged area and major structural members,is then developed in the digital environment.Both flight paths were evaluated using photographs of damaged areas,drone flight times,and point cloud models,and the results showed that the parallel flight path was superior to the orbital flight path in all aspects.