一种叶片干摩擦阻尼器耦合振动分析的二维局部摩擦模型

摘要

Based on the one-dimensional micro slip model and trajectory-tracing method,a two-dimensional micro slip friction model to analyze coupled vibration of turbine blades was presented by introducing parallel springs with sliding contact points to simulate the contact condition.The formula of friction force for all friction contact states was deduced. The mechanism of two-dimensional micro slip was deeply revealed by simulations.The conclusions drawn from the analyses show that the two-dimensional micro slip is of both consistency and essential difference as compared with one-dimensional micro slip and that the two-dimensional micro slip model can be well used to analyze,the coupled vibration of dry friction damper.%从一维局部滑动模型和轨迹跟踪法出发，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，提出一种二维局部滑动摩擦模型。推导了各种摩擦接触情形下的摩擦力计算公式，通过仿真深层次揭示了二维局部滑动的规律。结果表明，二维局部滑动与一维局部滑动相比既有一致又有本质不同，二维局部滑动模型可用于叶片干摩擦阻尼器耦合振动特性的分析。