Research And Development Of Forklift Gantry Parametric CAD/CAE Integrated System Based On UG NX

With the rapid development of logistics industry,the market demand for forklifts has increased dramatically.In recent years,forklifts have gradually developed towards serialization,diversification and intelligence.The shape and structure of the forklift gantry of the same series are basically unchanged,only slightly different in size due to different tonnage.Using parametric design technology for the secondary development of general-purpose software to develop a dedicated product design system can effectively shorten the product design cycle.At the same time,there is also a lot of repetitive work in the process of model finite element analysis and optimization.The introduction of parametric design ideas into the field of CAE enables parameterization of model analysis and optimization.In recent years,it has become the development trend of CAD/CAE integrated technology to complete modeling and analysis in the same software.The research object of this paper is the two-stage gantry of a certain type of internal combustion forklift.In view of the shortcomings such as heavy workload,cumbersome operation,and difficult modification in the design process,this paper uses parametric technology and secondary development technology to develop a parametric design and analysis system for key gantry components.The system uses UG NX10.0 as the development platform,Visual Studio 2012 as the compilation development environment,C ++ as the programming development language,and adopts the mixed development method of NX Open C and NX Open C ++.By using Menu Script and Block UI Styler tools to design user menus and dialog boxes to achieve human-computer interaction functions.According to the design requirements of the forklift gantry parametric system,a four-layer system architecture is constructed,and the system is divided into three modules: parametric modeling,parametric analysis,and parametric optimization.The key technology of the secondary development of UG NX is researched,and finally the overall system design scheme of the system is determined.he parametric design method is studied,and the gantry model is established as a parameterized template file through expressions.Using the secondary development method based on model template,combined with the NX Open API interface function to develop the parametric modeling system of forklift gantry.Through the program control,rapid modeling of forklift gantry components is realized.Based on the parametric model,combining the stress situation of the forklift gantry and the finite element analysis step in the UG NX advanced simulation module,using the Journaling secondary development tool,a parameterized finite element analysis system is developed based on NX NASTRAN.Through automatic simulation analysis to judge the strength,stiffness,and other performance of the gantry model,it provides a reference for the next step of optimal design.According to the results of automatic simulation analysis,based on the optimized mathematical model and simulated annealing algorithm,a parameterized optimized design system is further developed.The optimization process and simulated annealing algorithm are encapsulated into the application program.The system automatically finds the optimal solution to drive the model update,and realizes the parameterization of control parameters,objective functions,constraints,and design variables.For the phenomenon of excess material in the fork,it is automatically optimized through the parametric optimization design system to achieve its own weight reduction under the premise that the strength and rigidity meet the requirements.The development of the parameterized CAD / CAE integrated system of the forklift gantry has truly realized the entire process of parametric design-analysis-optimization of the model on the same platform,effectively improving the efficiency and quality of component design and greatly shortening the product design cycle.