Research On Multidisciplinary Design Optimization Of Complex Mechanical Product Based On Simulation Analysis

Efficient, precise, intelligent, integrated, virtual and digital is the design trend of modern complex mechanical product. In order to seek the optimal design as efficiently as possible, multidisciplinary design optimization (MDO) is introduced to use from aviation field into mechanism design aereas. An effective new digital design optimization technique is explored based on profound research of merging MDO into virtual prototyping technologies.A new architecture of MDO application in mechanical design domain is established during thoroughly research on MDO technical essential factors, and a complete generalized MDO procedure of complex products is put forward. Aimed at solving the inconsistence of CAD/CAE multi-domain models, the multidisciplinary view-modeling technique is proposed, directed by the master view-model. Assurance architecture to keep the essential coherence among multidisciplinary models is discussed to eliminate the redundant connections and dynamic conflictions. The dynamic interaction and information sharing between multidisciplinary view-model is guaranteed. Virtual prototype (VP) is constructed to support assimilation and innovation of import product and technology based on product parameterization model. By means of grid sharing, the problem of multidisciplinary CAE software coupling simulation is solved.How to merge the MDO method into digital design procedure of complex mechanical product is investigated, and the application characteristic of MDO at different stage is analyzed. By integrating MDO techniques into virtual prototyping technology, a new kind multidisciplinary optimization design pattern of virtual prototype is proposed, the MDO integrated design system is constructed centered on functional VP. Then, an integrated MDO analysis procedure of VP is presented, and multidisciplinary integrated automatic optimum design of virtual products is realized. The problem of multi-performance dynamic optimization of product system is settled. Therefore, a higher level platform for complex products design is provided. After further discussion, an integrated pattern of complex product including design, analysis, optimization, and simulation is brought forward. Based on the idea of integrative assembly of generic software, an integrated platform for complex product MDO is constructed, which provides a solution for the integrated design of modern product and achieves the goal of specialized application with generic software. A new design method to use MDO in vehicle design is proposed and its specific application character in different design stage is also defined. Complete analysis and optimized simulation of multi-performance is realized through integrated analyzing and optimizing flow of vehicle MDO. Further, compared with the traditional empirical design of screw compressor, an integrated multidisciplinary design pattern is put forward to develop the new style twin-screw refrigerating compressor based on MDO. Through mixing the CFD model, FEA model and FSI coupling models together to construct the multidisciplinary functional virtual prototype models simulation system of screw compressor, operating characteristic can be fully simulated. And then, the meaningful transformation of complex mechanical product design from traditional mode to the forecast design is partially achieved.