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采用带滑动触点的并联弹簧来模拟二维平面运动时叶片-阻尼器间的干摩擦接触,建立一种二维局部滑动摩擦接触模型.在叶片缘板处附加两个相互垂直的弹簧阻尼单元来模拟叶片振动时的二维干摩擦力建立B-G(blade-ground)型叶片-缘板阻尼器有限元模型.结合两个模型提出二维耦合振动时叶片缘板阻尼器减振特性的分析方法.算例分析表明在工作频率附近,存在一个正压力的范围使得二维耦合振动时叶片稳态幅值减振效果最好,频率对稳态幅值减振特性无明显影响.分析方法适用于各种复杂平面摩擦接触时叶片缘板阻尼器耦合振动的分析.
The parallel spring with sliding contact was used to simulate the dry friction contact between blade and damper in two-dimensional plane motion, and a two-dimensional local sliding friction contact model was established. Two perpendicular spring damping units To simulate the two-dimensional dry friction force of blade vibration, a finite element model of blade blade (blade-ground) vane-edge plate damper was established.By combining the two models, the analysis method of damping characteristics of blade edge plate damper The case study shows that there is a range of positive pressure in the vicinity of the operating frequency so that the steady vibration amplitude of the blade is best when the two - dimensional coupled vibration is applied, and the frequency has no obvious influence on the steady - state amplitude damping characteristics. Coupling Vibration Analysis of Blade Edge Damper with Various Complicated Plane Friction Contact.