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In order to solve the defect of water leakage of the positioning pin of the door trim during the trial assembly stage of a vehicle model, this article searched for the cause from water management of the door system, positioning method of the door trim, sealing structure of the door trim, and seal material. It is found that the positioning pin through the door sheet metal locating hole is impacted by large water flow, and the sealing pad of the positioning pin blocking the sheet metal hole has less compression on the sheet metal, the gravity and impact force of water is greater than the sealing force of the sealing pad, water pushes the sealing pad apart and flows along the sealing pad to the inside of the door trim. The stress and deformation of the foam cushion block of the positioning pin seal of the door trim were studied. Increasing the thickness of the foam cushion block of the locating pin and increasing the support rate of the positioning pin base to the foam cushion block of the positioning pin will increase the compression of the positioning pin seal cushion block to the sheet metal, and make sure the sealing force of the foam cushion block is greater than the thrust of water on it, the defect was thus solved, and the design and verification criteria for the door trim board positioning and water management were optimized.
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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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