Research On Operation And Positioning Of Nuclear Polar Crane Based On Dynamic Analysis

Nuclear polar crane,as an indispensable lifting and transportation equipment in theconstruction and operation process of nuclear power plant,belongs to large special lifting machinery.Because of the special use environment,the safety and positioning accuracy are the primary consideration in it's operation.Therefore,the precise positioning of the lifting objects is the important and difficult point in the design process,and positioning accuracy of operation system is one of the important factors that affect it.Especially the horizontal guide device,which is an important structure to ensure stable operation and positioning accuracy.At present,most of the enterprises,which capable of producing nuclear polar cranes are mostly drawing lessons from the structure of the horizontal guide device of the foreign nuclear polar cranes.However,the specific running characteristics and the laws of kinematics and dynamics under different working conditions are still not clear and try to figure it out.In this paper,a type of nuclear polar crane designed by Dalian Huarui heavy industry group is taken as the research object.The method of multi-body dynamics and the virtual prototyping technology are used to analyze the operation characteristics of it,and obtain its operating parameters at the same time,especially the horizontal lateral force time history and operating deviation of the whole machine.The main works of this paper are as follows:(1)A simplified multi-rigid-body mathematical model of crane is set up based on the theory of virtual power,and use MATLAB to solve the horizontal lateral force and the operation deviation of the whole machine;(2)The three-dimensional model of crane is established by using Pro/E,and build multi-rigid-body model in ADAMS.The operation characteristics under different conditions are analyzed,and compare the horizontal lateral force results obtained by simulation with theoretical results;(3)The finite element model of the bridge is established in ANSYS,and generate the modal neutral file after the modal analysis,then introduced it into the ADAMS to assemble the rigid and flexible coupling model with the other rigid parts.The deformation of the most flexible and most long-span bridge is considered as a factor affecting the positioning accuracy of the whole machine.Carry out the simulation analysis of different working conditions to get operation parameters,which are closer to the actual condition of the crane.In a word,through the combination of dynamic theoretical analysis and simulation,the operating parameters of this crane are obtained,especially the lateral force of the horizontalwheel under different working conditions,which has an important influence on the precise positioning.The parameters obtained,on the one hand,can provide a theoretical reference for the design of the nuclear polar crane;on the other hand,it provides data support for design the better performance and safer nuclear polar crane from the practical application.