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With the aluminum bracket of a new energy vehicle power battery as the research object, the level set method is employed to perform topological optimization on the power battery bracket. During the optimization process, factors such as structural stiffness, strength, fatigue, and dynamic safety are comprehensively considered. The optimization results are interpreted and the structure is reshaped to obtain a new structure that meets the requirements. The reshaped structure undergoes sensitivity analysis to identify sections requiring optimization. Through topology optimization, a reasonable cross-sectional shape is obtained, and the optimized structure is verified to ensure performance enhancement. Upon comparison, the optimized power battery bracket exhibits a 5.9 Hz increase in first-order modal compared to the original structure, with an overall stiffness improvement of 18.2%. The results for stiffness, strength, and random vibration are superior to the original structure. Fatigue analysis indicates that the damage to the new structure is less than 1, indicating its superiority over the original structure. Additionally, the weight of the optimized battery bracket is reduced from 209 kg to 180 kg, representing a weight reduction ratio of 13.8%.
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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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