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提供一种估算含多层叠片阻尼器转子危险转速区的“敏感度”分析法。采用传递系数法,计算刚度区间各离散点对应的临界转速,通过分析临界转速相对支承刚度变化的敏感程度,确定转子危险转速区。首先,划分转子计算节点,计算各节点物性参数值;其次,取定支承刚度存在的范围,按二分法离散刚度区间,利用传递系数法,循环计算每个离散刚度点对应的临界转速和振型,直到找出振型突变的两个相邻刚度点;接着,做出临界转速随刚度变化的规律曲线,根据曲线找出临界转速变化剧烈时对应的子刚度区间,该区间与上步找出的刚度点行成的区间应是相符的;然后,若希望得到更高精度的结果,可以在子刚度区间内,重复步骤二,直到得到满意结果。该方法易于实现模块化操作,避免在敏感支承刚度区出现危险转速。
A “Sensitivity ” method is provided for estimating the critical speed zone of a multilaminate damper rotor. By using the transfer coefficient method, the critical speeds corresponding to the discrete points in the stiffness range are calculated. By analyzing the sensitivity of the critical speeds to the changes of the support stiffness, the dangerous rotor speed zone is determined. First, divide the rotor calculation node to calculate the physical parameter values of each node; Secondly, take the range of the fixed support stiffness, according to the dichotomy discrete stiffness interval, using the transfer coefficient method, calculate the critical rotation speed and vibration mode corresponding to each discrete stiffness point , Until two adjacent stiffness points of the mode-change mutation are found out. Then, a regular curve of the critical speed with stiffness is found. According to the curve, the corresponding sub-rigidity interval is found when the critical speed changes sharply. Of the stiffness of the line into the interval should be consistent; and then, if you want to get more accurate results, you can sub-stiffness interval, repeat step two until you get a satisfactory result. This method makes it easy to modularize and avoid dangerous speed in the zone of sensitive support stiffness.