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In order to explore the lightweight space of multi-purpose truck body, multidisciplinary optimization was carried out in three dimensions of performance, quality and cost. With the multi-purpose truck Body-In-White (BIW) as the research object, 46 design variables were selected, covering 1 680 sample points at 73 part thickness levels, and the optimal Latin hypercube method was used to conduct the experimental design of bending torsional stiffness, mode frequency, mass, and cost, to obtain the sensitivity of the part’s contribution to the BIW performance, and to establish a second-order polynomial response surface approximation model. Specifically, three groups of optimization solutions were formulated to maintain the basic performance level of the original body, the allowable stiffness decreased by 10%, and the modal fluctuation was 2 Hz; the allowable stiffness decreased by 20%, and the modal fluctuation was 4 Hz. The Pointer automatic optimizer was used to optimize the design with the minimum mass as the objective function. The results show that three optimization solutions can reduce the mass by 14.63 kg, 20.37 kg and 25.78 kg respectively.
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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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