前面衝突性能向上を考慮した車両部材の均質性の評価・分析手法を用いた最適な曲率形状の抽出(機械力学,計測,自動制御)

概要

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Signs of incompatibility such as over-inding, under-riding and forking are likely caused by geometrical incompatibility in the vertical and horizontal directions. The issue is, therefore, not only a problem for partner protection but also a possible disadvantage in self-protection. One possible solution to this contradictory problem is to have good structural interactions between the front-ends of the two cars. In this research, it was hypothesized that homogeneous vehicle front-end structures are desirable for simultaneously reducing aggressivity and damageability. Homogeneity was evaluated using high-order statistical variables, and an attempt was made to optimize the shapes of energy-absorbing structuresusing muti-functional criteria to satisfied based on real world conditions. FE models were made of the energy-absorbing frontal structures of a small car. The structure were modeled with beam elements for the sake of simplicity with respect to the parts targeted for shape optimization. A multipurpose design optimization tool based on a genetic algorithm was used as the tool for shape optimization. The results obtained from shape optimization are numerically tested in actual car structure in real world crash conditions to confirm the effectiveness of curved structures.
2006-06-25