含间隙和干摩擦舵结构系统的非线性动力学特征

Nonlinear dynamic characteristics for a rudder structure system with dry friction and clearance

针对舵结构系统的非线性动力学问题,提出了含间隙和干摩擦情况舵结构系统典型工况下的振动力学模型,基于理论分析揭示了舵结构系统变刚度、振幅跳跃、低频相位异常增大以及自激振动等现象发生的机理和规律,并将理论分析结果与数值计算和试验测量结果进行了对比,验证了理论模型和分析方法的正确性。

Aiming at the nonlinear dynamic characteristics of a rudder structure system, typical vibration mechanical models for a rudder structure system with dry friction and clearance were established here. Theoretical analysis method was used to study the mechanism and rules of the typical nonlinear dynamic phenomena including variable stiffness, amplitude skipping, self-excited vibration and low frequency phase lag abnormal increase for the rudder structure system. The theoretical analysis results were compared with numerical simulation and test ones, they showed that the proposed models and analysis methods are correct.