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| Study on Multi-objective Optimization of a New Side-load Spring for MacPherson Suspensions |
| LIU Jiang, WANG Yu-Shun, YU Fan |
(1.School of Automotive and Transportation, Qingdao Technological University, Qingdao 266520, China; 2.Qingte Group Ltd. Co., Qingdao 266106, China;
3.School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Aiming at decreasing shock absorber’s side load in the MacPherson suspension system, improving suspension performances and reducing manufacture cost, a multiobjective optimization approach was proposed. This virtualprototypebased approach combines the penalty function algorithms SUMT, vehicle system dynamics simulation and finite Element Analysis. Taking a small passenger car as an example, structure parameters were optimized for this curved side load spring. The results of vehicle dynamics simulation, the experimental data of test rig and on road test indicate the improvement of ride performances, in which the side load on damper rod reduces almost to zero and the first resonance peak amplitude of the body acceleration decreases by nearly 24.37%. Besides, the average weight of spring samples also reduces by 2.71% so as to save the manufacture cost.
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Received: 01 April 2010
Published: 29 April 2011
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