The bifurcation diagrams of bending and torsional vibrations can be divided into four zones which have different influence of mass eccentricity.
同时，弯振和扭振分叉图可分为四个运动区，质量偏心对这四个运动区的影响各不相同。
The monition equations of airfoil are written as the four dimensional first order differential equations. Taking airspeed and the linear part of pitching stiffness as the bifurcation parameters.
机翼的运动方程可以写成四维一阶常微分方程，取广义气流速度和线性俯仰刚度作为分岔参数。
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