Subframe is an important part of automobile chassis, which is connected with body, suspension control arm, powertrain mount, etc. The dynamic stiffness value of the connection point is an important performance index of the subframe, which affects the vibration of the vehicle body. This paper introduces the basic concept and related theory of dynamic stiffness, derives the theoretical formula of dynamic stiffness, and analyzes the frequency response of the key points of the subframe. In view of the fact that the dynamic stiffness of the subframe of a certain vehicle model is not up to the standard at some connection points, the dynamic stiffness CAE simulation analysis is carried out to determine the frequency range of insufficient dynamic stiffness and the connection points that need to be optimized. The combination optimization method combining size optimization and shape optimization is adopted, and genetic algorithm is used to set multiple mass constraints with multiple shape variables and size variables as design variables, so as to achieve the goal of optimizing the dynamic stiffness of the subframe. The simulation test shows that the dynamic stiffness of each key point of the subframe can basically meet the target requirements under the constraint of 15% increase in the mass of the subframe.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Multi-objective Combination Optimization of Automobile Subframe Dynamic Stiffness


    Additional title:

    Sae Technical Papers


    Contributors:
    Wu, Guangqiang (author) / Wu, Jian (author) / Chen, Qiushi (author) / Ouyang, Tao (author)

    Conference:

    WCX SAE World Congress Experience ; 2023



    Publication date :

    2023-04-11




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Multi-objective Combination Optimization of Automobile Subframe Dynamic Stiffness

    Ouyang, Tao / Wu, Jian / Chen, Qiushi et al. | British Library Conference Proceedings | 2023


    Automobile subframe

    TAKAHASHI HAYATO / TOMIKUDA NORIO | European Patent Office | 2015

    Free access

    AUTOMOBILE SUBFRAME ALIGNMENT FIXTURE

    ROBAINA ROBERTO | European Patent Office | 2021

    Free access


    subframe structure for automobile

    RIM JUNG MIN | European Patent Office | 2019

    Free access