Analysis Research On Static And Dynamic Performance Of Aircraft Maintenance Platforms

In recent years, the aviation industry has been developing rapidly in our country. The aircraft is called flowers of modern technology and modern industry, while its manufacture and maintenance is much more difficult than the other industrial products. The emergence of aircraft’s steel structure platform greatly reduces the difficulty and makes the process of manufacture and maintenance become safe and efficient. But once the design of steel structure platform is unreasonable, more serious consequences will occur. The construction will become more difficult, the staff will hardly complete assignments efficiently and construction accuracy can’t meet the requirements, which will lead to collapse and casualties. With the development of finite element analysis software, the research can use it to simulate and analyze the practical work situation of the steel structure platform, to help understand shortcomings in the design of the platform in advance, and to avoid unnecessary injury in the actual operation. Therefore the analysis of aircraft’s steel structure platform structure has important practical significance.On the basis of the structure analysis on traditional aircraft’s steel structure platform, the aircraft’s steel structure platform in a certain airport is regarded as the research object and the finite element model is established through the general finite element analysis software ANSYS. And the static and dynamic analysis of the finite element model has four parts.(1) According to the work environment of aircraft’s steel structure platform, all kinds of loads are considered in the practical work and stress analysis of the platform is done respectively under the action of dead load, floor live load, wind load, constant load and impact load, and then the platform need to make static analysis of combination operation and check strength according to the principle of load combination;(2) Make eigenvalue buckling analysis under the action of all kinds of static load, compare and consider live load buckling coefficient in condition of the constant load exist or not, analyze the structural stability that platform’s dead weight affect, and infer the overall stability of platform through observing the first100order buckling mode of platform;(3) Make modal analysis of rigid foundation and flexible foundation and extract the first20order natural frequency and vibration mode of steel structure platform through the modal analysis;(4)Considering the three earthquakes, the standard spectrum is adopted to analyze mode-superposition response spectrum for steel structure platform and platform’s dynamic response is computed in the case of seismic load. In addition, the time history analysis as supplement to the spectrum analysis makes transient dynamic analysis of the steel structure platform by artificial wave, compares the acceleration time history response to different locations, extracts displacement amplitude and amplitude internal forces in the dynamic process, and checks the strength of main bearing structure. Finally comparing the results of the vibration mode decomposition response spectrum method and time history of dynamic analysis, seismic safety evaluation of the aircraft’s steel structure platform should be made.In conclusion, the beams and load-bearing column can meet the requirements of bearing capacity limit state under the action of the static and dynamic, and the structure is designed reasonably. It could provide reference for other relevant engineering design and the related research.