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Outline
To accurately evaluate and optimize the structural performance of the Body-in-White (BIW), this study focuses on a passenger car BIW by conducting equivalent torsional stiffness analysis and structural improvement research. Based on the pre-processing software ANSA and the finite element solver Nastran, a high-precision finite element model of the BIW is established in accordance with finite element theory. The equivalent torsion analysis method is employed to obtain the dynamic response curve of the BIW's equivalent torsional stiffness. Subsequently, structural weak areas are identified, and targeted reinforcement schemes are proposed accordingly. Simulation verification results show that the proposed reinforcement scheme significantly enhances the torsional stiffness of the BIW, and the optimized dynamic curve of equivalent torsional stiffness is markedly improved. The proposed method effectively guides the structural design and optimization of the BIW, providing a reliable theoretical basis and technical support for improving the NVH performance and ride comfort of the vehicle.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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