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With the development of civil aircraft design technology, the focus of today's passenger aircraft design transits from structural safety to cabin comfort, of which the vibration comfort is a key factor. From the perspective of passenger vibration comfort, We carried out the vibration transfer path test of a certain type of passenger aircraft under three working conditions, namely, the cruising condition, the low-altitude flight condition, and the runway running condition. Based on the test data of these conditions, the Vibration Transfer Path models were built, and the key factors affecting the vibration comfort were studied. The following conclusions are drawn:Under the cruising and low-altitude flight condition, the cabin vibration response mainly comes from the coupling of engine rotor excitation and the structure at the fundamental frequency and the double frequency；under the runway running condition, the vibration response in the cabin comes from the coupling of the main landing gear excitation and the structure in the low frequency range（especially 50 Hz）. This test not only provides a basis for the vibration reduction and isolation design of passenger cabins, but also fills the gap of the vibration comfort test and verification platform for all passenger aircraft in China.
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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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