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In order to improve the lightweight degree of the whole vehicle, according to the equal strength principle and iterative optimization method, a lightweight new energy tractor frame is designed by using 6082-T6 aluminum alloy extrusion and referring to the structure of steel frame. Through finite element modeling and simulation, simply supported beam simulation calculation, multi-channel bench simulation analysis and physical bench test, the static strength, bending stiffness, torsional fatigue strength performance are verified. The minimum safety factor of static strength of the final frame scheme is 1.11, the bending stiffness is 1.06×1013 N/mm, and the torsional fatigue test has not failed for 400 000 times. The results show that the newly designed frame of new energy tractor can meet the performance requirements and reduce weight by 40% on the basis of steel frame.
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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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