Variable structure parametric design based on TBS
                                                                   LIU Jinhong, YANG Lihong, GAN Yi
          (College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

Abstract: Aiming at the problems of the mechanical product design such as individualization, serialization and efficiency that cant meet customer's needs, then the product design early modeling ideas and assembly methods and other aspects were studied. A new method of product design process beginning from the customer's needs，to the overall assembly model, then to the local components was established, which came from the modeling thought the top basic skeleton (TBS) and the parametric design tool EDS.Through the parametric design of the variable structure of the elevator car, the only realtime correspondence between the modeling parameters and the size parameter control of the design object was achieved. The research results indicate that the combination of TBS and parameterization can improve the efficiency of mechanical product design, shorten the design cycle and meet the requirements of customers for personalization and reliability.

Key words: top basic skeleton; parameterization; variable structure; EDS