Buckling Analysis And Optimization Design Of Right Angle Deep Cut Parallel Four-bar Mechanism

In recent years,flexible hinge beams have been widely used in important engineering fields such as construction,aviation and shipping.In practical engineering applications,flexible hinge cantilever beams are often affected by the external environment and cause buckling failure of the structure,reducing the structural reliability,and may seriously cause a series of safety problems.In this paper,Unit-free Galerkin method and finite element method are used to analyze the buckling failure of right angle deep cut parallel four-bar mechanism.The analytic hierarchy process,orthogonal design and ANSYS technology are used to optimize the parameters of right angle deep cut parallel four-bar mechanism,improve the reliability of the structure to prevent structural buckling failure.Its main research work is as follows:(1)For the problem of bending failure analysis of right angle deep cut parallel four-bar mechanism,a method of buckling analysis of based on element-free Galerkin method is proposed.Firstly,according to element-free Galerkin method choose the appropriate shape function,weight function and boundary processing method,Then the buckling numerical model is established based on the parallel four-bar mechanism of the right angle deep-cut flexible hinge,write Matlab program and iteratively solve related data,according to the numerical model,the buckling instability analysis is carried out under the ratio of the length of the rigid rod of different elastic hinges to the length of the flexible part to further verify the feasibility and accuracy of the numerical model.(2)For the validity and feasibility of the element-free Galerkin method numerical model for right angle deep cut parallel four-bar mechanism,eigenvalue buckling analysis and nonlinear buckling analysis using finite element software ABAQUS.Firstly,establish mechanical motion model with right angle deep cut parallel four-bar mechanism,Then using ABAQUS software to analyze the eigenvalue buckling instability and the nonlinear buckling instability analysis after being affected by many nonlinear factors,compare the simulation results with the calculation results of the numerical model in the previous chapter,to verify the feasibility and effectiveness of the element-free Galerkin method numerical model for right angle deep cut parallel four-bar mechanism.(3)For the right angle deep cut parallel four-bar mechanism in the process of parameter optimization design is difficult to construct response optimization design model,getting the best parameter design combination is not easy.A new method of parameter optimization design based on analytic hierarchy process,orthogonal design and ANSYS technology is proposed.Firstly,establish mechanical motion model with right angle deep cut parallel four-bar mechanism,import finite element software ANYSYS for orthogonal test to obtain test data,then based on the theory of analytic hierarchy process,the structural parameter optimization model of right angle deep cut parallel four-bar mechanism is constructed,perform parameter optimization analysis on the test data,and effectively and intuitively learn the correlation between the selected structural parameters and the response target,get a quantitative evaluation result By optimizing the parameters of right angle deep cut parallel four-bar mechanism,the optimal parameters are obtained,the reliability of the structure is improved,and a new idea is provided for the optimization design of the parameters of the structure,which has greater application value.