民用客机的振动传递路径试验及分析

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Abstract： 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 afecting 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 50Hz ）. This test not only provides a basis for the vibration reduction and isolation design of passenger cabins，but also fils the gap of the vibration comfort test and verification platform for all passenger aircraft in China.

Key words ：civil aircraft； vibration comfort； vibration transfer path test； contribution analysis

客机在运行工况中，往往受到多个振动激励源激励，如发动机激励、起落架舱激励，及起落架激励等，这些激励源经由不同的传递路径抵达客机驾驶舱、客舱位置后叠加而成总的振动响应，从而被人体感知到，造成客机的振动舒适性问题[1-3] 。（剩余9289字）