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In order to improve the safety of a commercial vehicle cab complying with the requirements of GB 26512—2011 real vehicle test and make it meet the requirements of GB 26512—2021, the Box-Behnken test design and Sequential Quadratic Planning (SQP) algorithm improvement were carried out for problems occurring in the cab simulation such as excessive peak force of longitudinal beam in frontal impact test, insufficient energy absorption in A-pillar impact test and serious crushing in side 20° impact test; and cab was optimized by setting bending beam and filling Expanded Polypropylene (EPP) foam material. The results show that after optimization, the longitudinal beam peak torque is reduced from 92.3 kN to 72.4 kN, the structural energy absorption is improved by 36.9%, the survival space is sufficient to meet the requirements of the new standards, and the cab safety is significantly improved.
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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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