Innovative and Optimized Design of Integrated Die-casting Subframe
The lightweight design of automotive components can effectively promote the lightweight of the entire vehicle,improve prod-uct quality,and assist enterprises in achieving cost reduction and efficiency increase.Taking a new energy vehicle subframe as the research object,two core lightweight methods,structural lightweight and process lightweight,were adopted for innovative and optimized design of the subframe structure.Adopting the integrated die-casting process instead of the original welding process as the direction of structural opti-mization,a comprehensive analysis is conducted on the splice welded subframe,and the performance of stiffness,strength,modal and dy-namic stiffness are extracted as the optimization objectives and constraints of structural optimization.Using MMO multi model optimization technology to compliance and mass objectives for topology optimization,interpreting the load transfer path and reshaping the optimized structure.Further parameter optimization is carried out to determine the optimal thickness of the structure.The optimized subframe under-went performance and process analysis again.After analysis,the first-order modal of the newly designed subframe increased by 45.3HZ,an increase of 16.5%;The maximum stress(working condition 4)decreased by 153.9 MPa,and the strength increased by 48.2%;The stiff-ness and dynamic stiffness performance of each attachment point also have varying degrees of improvement;The new structure has a weight reduction of 2KG,a reduction of 15.6%,and a single piece processing cost reduction of 41.62 yuan,a reduction of 8.6%.The new sub-frame has achieved the design goals of improving performance and reducing weight and cost.
NETL
NSTL
万方数据
维普
