Transactions of FAMENA, Vol. 48 No. 3, 2024.
Original scientific paper
https://doi.org/10.21278/TOF.483060723
Optimised Design of Frame Topology Based on the Exponential Scaling Hierarchy Analysis Method
Yang Zhou
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, China
Jiachuan Xu
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, China
*
Weidong Qi
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, China
Xinyu Sun
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, China
Han Xu
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, China
* Corresponding author.
Abstract
Relying on the research and development project of a specific company, the present study conducts a topology optimisation design for an aluminium alloy frame intended for a light-duty truck. In light of the discrepancy observed in the conventional strength calculation outcomes for the unconstrained frame, the inertia release method is employed to determine the strength of the said frame. A novel approach is presented to address the issue of multi-condition frame topology optimisation. The proposed method incorporates weighting coefficients to facilitate the optimisation process. The weight coefficients for each working condition are determined using the exponential scale hierarchical analysis method. Subsequently, an objective function is formulated for the multi-objective topology optimisation of an aluminium alloy frame. The proposed method aims to optimise the topology of an aluminium alloy frame by considering the constraints of volume fraction and the objective of minimising flexibility under various working conditions. The findings indicate that the optimised aluminium alloy frame exhibits an 18.9% increase in bending stiffness and a 150.3% increase in torsional stiffness. The safety coefficient of the frame strength exceeds 1 under all operational circumstances. The frame has a mass of 157 kg, which is reduced by 30.8%. The performance of the optimised frame is significantly enhanced, resulting in a noticeable lightweight effect.
Keywords
exponential scaling hierarchy analysis; inertia release method; topology optimisation; lightweighting; weighting factors
Hrčak ID:
319756
URI
Publication date:
19.6.2024.
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