Automobile body continuous-variable-based discrete thickness optimization for maximizing natural frequency

Henry Panganiban; Gang Won Jang; Tae Jin Chung; Young Min Choi

doi:10.1117/12.783778

9 January 2008 Automobile body continuous-variable-based discrete thickness optimization for maximizing natural frequency

Henry Panganiban, Gang Won Jang, Tae Jin Chung, Young Min Choi

Author Affiliations +

Proceedings Volume 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials; 679435 (2008) https://doi.org/10.1117/12.783778
Event: ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 2007, Gifu, Japan

Abstract

Thickness optimization of an automobile body is presented. The thicknesses of plates making-up the monocoque body of an automobile are employed as design variables for optimization and the objective is to increase the first torsional and bending natural frequencies. By allotting one design variable to each plate of the body, compared to previous works based on element-wise design variables, design space of optimization was reduced to a large extent. Considering manufacturability of the optimized thicknesses, a straightforward thickness discretization scheme considering design sensitivities and employing a subsequent reduced optimization problem is formulated. With the optimized thicknesses, the car body maintained its weight with around 6 Hz frequency increase compared to the initial design.

Citation Download Citation

Henry Panganiban, Gang Won Jang, Tae Jin Chung, and Young Min Choi "Automobile body continuous-variable-based discrete thickness optimization for maximizing natural frequency", Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 679435 (9 January 2008); https://doi.org/10.1117/12.783778

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