旋翼激励下直升机振动响应预计及实测对比

Subjects: Mechanics >> Basic Mechanics submitted time 2023-04-24 Cooperative journals: 《应用力学学报》

王影 王文涛 习娟

Abstract： Rotor exitation is the main source of helicopter vibration,which effects pilot manipulation,comfortability as well as structural fatigue.Vibration problems are generally exposed during test flights,and problem handling and solution often require large cycles and costs,that affecting helicopter development.The prediction of helicopter vibration response is a major way to deal with vibration problems,which can be found in the early stage,convenient to carry out optimization design or solution plan in the early development stage of the helicopter.In this paper,a method to predicting vibratory response excited by rotors was presented,which takes vibratory loads of rotor center in nonrotating coordinate system as input,and based on the structural dynamic model.The method was proved to be effective,whose results had coordinated variation patterns as measured data,as well as satisfying accuracy of the engineering needs,through comparing analysis of predicted vibration response and measured ones excited by tail-rotor of the important positions of a certain helicopter.The method has high engineering value in vibration response analysis,vibration problem investigation and vibration control scheme formulation.

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