Mechanics Analysis And Evaluation Of Critical Components Of Large Span And Large Load Temporarily Installed Suspended Access Equipment

As a modern construction and installation of the necessary equipment-temporarily installed suspended access equipment(referred to as "basket")did high strength,high frequency operation in different working conditions.That putted forward higher requirements to strength,life and stability of key components.In China,key components and performance parameter of basket were not designed reasonably and were not inspected in time.This leaded to out of control or fall accident occurred occasionally of basket and cause great damage and loss.In thesis,mechanics analysis were studied on suspended platform and suspension mechanism,module combination design was studied on suspended platform,risk assessment and parameterized systemic design of key components.The results of the study provided a reference for basket product to the big load,large span,intelligent direction.In this thesis,the basket structure and its main performance parameters were introduced,and working condition and load calculation were analysised,the statics analysis on the influence degree of the suspended platform stress were obtained preliminary based on statics analysis of suspension platform in load case.Buliding a simplified mechanics model of the suspension rigs to make analysis of the mechanics characteristics of the equipment under pretension and maximum load work conditions.Using ADAMS to study dynamics analysis of key components and obtain the corresponding displacement,velocity and acceleration of the structure under the condition of the response curve.Using ANSYS respectively to different lifting point form of each module combination scheme were analyzed,and concluded that the maximum stress and maximum deformation combination schemes,the best solution was determined by comparing the solutions to satisfy the intensity and the rigidity.According to the results of statics and dynamics analysis and based on AHP-FCEM theory studied risk assessment of key components,risk assessment model was constructed,failure weight was calculated,the failure risk level was divided,AHP-FCEM method were verified through the instance analysis to the feasibility of the hanging basket key components of risk assessment.Finally based on the parametric design idea,this thesis took advantage of ADPL to build the parameterization model of key components and combined this process with finite element method through interface based on VB,to achieve an optimization design system which was based on virtual reality technology and finite element analysis and finish the whole process of parameterized modeling,optimization analysis and producing optimal outputs.In thesis,mechanics theoretical analysis was used to large load,large span of temporarily installed suspended access equipment and finite element analysis technology and theory of risk assessment were combined to optimize and analysis key components of basket,based on VB language to complete the basket parameterized system development,a set of feasible methods of structure analysis were obtained,the results of the study provided a reference for new product development.