| With the exhaustion of the traditional energy such as coal,oil and gas,the deterioration of the global climate caused by the consumption of non-renewable energy has attracted the attention from all the world.Due to the progress of science and the sustainable development strategy,the new energies including solar energy,biomass energy,geothermal energy,and other energies are developed and applied gradually.Since the world oil crisis in 1973,wind energy as an important part of the new energy has shown tremendous growth.As a reliable way to solve the energy for production and life,wind energy is of great significance.In recent years,the wind power industry has been growing explosively.With the expansion of the installed capacity,the maintenance demanding of the equipments is also increasing year by year.As an easily destroyed part,in harsh environments,wind turbine blades need to be maintained regularly.But the maintenance for the wind turbine blade in domestic mainly depends on spiderman and large equipments,and it is not ideal no matter from economy and safety.For the next ten years,the phenomenon will be more prominent,therefore,developing the maintenance equipment with the domestic independent intellectual property rights has the urgent practical significance.In this thesis,based on the related maintenance lifting equipment,digital design method was applied to design the wind turbine maintenance equipment.The main content of this thesis is as follows:Firstly,according to the operating features and the structure characteristics of wind turbine blades,the basic structure form of the maintenance platform was determined preliminarily.The design parameters of the wind turbine blade maintenance platform determined,the main parts and components were selected,and the overall plan was determined.The 3D model of maintenance platform was established by using the software Solidworks,then imported into ANSYS Workbench for finite element analysis.According to the regulation of national standard,the static response for maintenance platform under three kinds of typical working condition was analyzed to validate that whether the strength and stiffness meet the design requirements.Secondly,based on the statics analysis results and the conceptual design ideas,the maintenance platform was optimized by the topology optimization technology,then the structure of the maintenance platform was improved.The weight of the platform was reduced significantly,and the structure was more reasonable.In order to analyze the dynamic behavior of platform,vibration frequencies and modal of the platform were extracted and compared with those from external environmental to avoid the possibility of the structure resonance.In order to avoid the effect caused by the impact load,the transient dynamic response of the maintenance platform was analyzed,to verity the rationality of the design.Finally,the adaptability study of the maintenance platform was analyzed in order to guarantee that the designed maintenance platform was able to adapt to the wind turbine structure characteristics and work stably.The influence of the maintenance platform in the work on the deformation tower drum was analyzed to verify the rationality of the design.In this thesis,the structural design mechanical analysis and optimization of the wind turbine blade maintenance platform was achieved.The adaptability of the maintenance platform was studied further.The whole works promote the theoretical research and practical application of maintenance equipment. |
