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di su zhong zai chun dian dong che che jia duo xue ke you hua she ji
Pages: 69-75
Year: Issue:  2
Journal: Haisting and Conveying Machinery

Keyword:  framelight-weightingmultidisciplinary optimizationrigid-flexible coupling;
Abstract: Battery electric underground transportation vehicle is a kind of low-speed, heavy-duty and zero-emission personnel carrier. Its frame is of non-bearing structure, good for improving the rigidity and strength of the frame. However, it is heavier than load-bearing body, affecting the vehicle's driving range. To lighten the frame and ensure sufficient strength, rigidity and good dynamic characteristics of the frame under various driving conditions, multidisciplinary optimization design method is used to study structural design problems of light-weight frame for battery electric underground transportation vehicle. In addition, a rigid-flexible coupling frame model is established to calculate the precise load on the frame. Compared with traditional methods, the model includes both the suspension system and sub-frame in the analysis model of the frame, thus better reflecting the influence of spring, shock absorber and guide mechanism in the suspension system on force transmission path and magnitude of force transmission. The study is conducted under driving conditions including full load bending, ultimate torsion and emergency brake turning. The result of multidisciplinary optimization design shows that at the required strength, rigidity and good dynamic characteristics, the total mass of the frame is reduced by 5.1% to realize lightweight structure design.
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