Volume 7B: 17th Biennial Conference on Mechanical Vibration and Noise · 1999 · 33 citations · 0 references
EngineeringMechanical EngineeringComputational MechanicsNonlinear AcousticVibrationsMechanicsNonlinear Vibration ControlVibration IsolationNonlinear VibrationStructural VibrationPhysicsMechatronicsActive Vibration ControlParametric ExcitationMechanical SystemMechanical VibrationMechanical SystemsTop MassNonlinear ResonanceStructural MechanicsVibration Control
Abstract The possibility of cancelling self-excited vibrations of a mechanical system using parametric excitation is discussed. A two-mass system is considered, with the top mass excited by a flow-generated self-exciting force. The parameter of the connecting stiffness between the base mass and the foundation is a harmonic function of time and represents a parametric excitation. For such a system general conditions for full vibration cancelling are derived and presented. By means of numerical simulation the system is investigated for several sets of parameters. The theoretical results are found to be in very good agreement with the results obtained by simulation. Parameter variations show the extent of the parameter space where significant vibration cancelling can be achieved and illustrate possible applications.