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To improve the structural crashworthiness of the car, a finite element model of the front rail of the vehicle was established with the front rail of a Plug-in Hybrid Electric Vehicle (PHEV) as research object, China New Car Assessment Program (C-NCAP) were referred to and based on the frontal 100% overlapping rigid barrier crash test. With the cross section of car front rail, interior & exterior panel material and thickness as the research object, and the specific energy absorption, mean crush force and collapse efficiency were taken as the research objective, the front rail of the vehicle was simulated and analyzed. The sample points were selected based on the Hamersley sampling method, and the response surface of the front rail was optimized by the improved least squares method. The results showed that the optimized specific energy absorption of the front rail of the vehicle increased by 1 129.14 J/kg, and the mean crush force increased by 8.2 kN, the crushing efficiency increased by 2.59 percent point.
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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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