Nonlinear Analysis And Topology Optimization On Crawler Crane Boom For Lifting Wind Power

More stringent environmental requirements are put forward for power generation with the needs of economic transformation in china.Construction of large-scale wind power projects are massively invested,a large number of wind fields are built in the plains,mountains and shallow seas.Crawler crane has the advantages of small turning radius,climbing ability and running with load,so crawler crane provides a great convenience for wind power installation and maintenance,hence,larger crawler crane is one of important equipment in wind power installation industry.The biggest risk in the pocess of lifting wind power equipment is that boom has insuffic ient bearing capacity under special conditions and wind power components interfere each other under the limitation of boom space,therefore,the boom of crawler crane which dedicated to lift wind power generators is researched,adopting the condition that composes of main arm frame and goose head arm and meeting rated lifting capacity of wind power generators,modeling and analys is of boom system are carried out,boom topology optimization design is also carried out,which has advantages of good lifting ability and light weight so as to improve the safety of lifting wind power generators.Main contents of this paper are as follows:(1)Working conditions of crawler crane boom system are diversity,because the workload of modeling and analys is of boom is very heavy,and changing crane parameters every time will cause a lot of repetitive work,adopting APDL to model is very convenient and time-saving,at the same time,it provides convenience for topology optimization of boom for lifting wind power generators.(2)Deformation geometric nonlinear analysis to crawler crane boom for lifting wind power generators is carried out,adopting finite element nonlinear analys is design theory and the relevant design standards,study on nonlinear characteristics of boom system cannot be ignored,and model calculation of boom is also conducted,which avoids interference with the wind power components and damages of resonance when crane works in order to enhance the safety of wind power components,workers and cranes.(3)Topology optimization is also carried out in this paper,and the redundant volume of boom is reduced,typical sizes,type of steel of boom and quantity of web members are optimized,through optimization,loss of steel is reduced and it satisfies manufacturing rules and safety requirement of boom,which has good practicability.(4)In this paper,man-machine interface software system is designed by adopting visual programming language,this software is easy to be operated,rapid modeling analysis and topology optimization of boom of crawler crane for installing wind power generator is realized quickly.The software can query and invoke required database,and it also assists to build boom finite element model.Rapid modeling is not limited to one working condition,and can achieve a variety of working conditions.The program has implemented to call the engineering finite element analys is software ins ide the software,the results will be saved,viewed and transferred easily.