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To solve the problem of abnormal friction noise of sunroof sealing strip on bumpy road, the frequency response analysis of vehicle input load signal simulating real road conditions was carried out. Firstly, an abnormal sound Evaluation Line (E-Line) was defined between the car body and the sunroof. Because the seal and the sunroof produced to-and-fro movement in Z direction and Y direction, the maximum relative displacement in Y direction and Z direction in each E-Line was obtained by calculation. Secondly, stick-slip test between sealing strip and PU surface was carried out on friction test bench to obtain the minimum abnormal noise displacement of seal. Finally, the results of simulation and test were compared to judge whether there was abnormal noise risk. The results show that by controlling the relative displacement between sunroof and vehicle body and the minimum abnormal noise displacement of seal, the risk of abnormal friction noise of seal can be reduced in the vehicle development stage.
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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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