平板颤振临界风速的参数灵敏度分析

建立了用于计算对称和非对称平板颤振临界风速的数学模型；详细分析了平板阻尼、宽度、质量、质量惯矩、竖弯频率、扭转频率、颤振导数、偏心质量和偏心距等参数对颤振临界风速的影响；提出并论证了平板颤振临界风速益损系数的诺模图理论，绘制了与各参数相关的诺模图．分析结果表明，借助新提出的益损系数概念，可以方便地进行颤振临界风速参数灵敏度分析，获得诸多定性和定量规律。

Parameters Sensitivities Analysis of Flutter Critical Velocity of Flat Plates

A mathematical model is presented for determining flutter critical velocity of both symmetric and asymmetric flat plates.The influences of plate damping,width,mass,inertia moment,vertical bending frequen- cy,tortional frequency,flutter derivatives,eccentric mass and distance on flutter critical velocity are analyzed in detail.The profit and loss coefficient nomogram theory of flat plate is developed and validated.Different nomo- grams of profit and loss coefficient that are relevant to various parameters are plotted.The analytical results in- dicate that the parameter sensitivities analysis of critical flutter velocity can be performed conveniently by using the newly proposed concept of profit and loss coefficient,and some qualitative and quantitive laws are obtained.