Vibration Concepts Quiz

Vibration Concepts

• Energy Exchange: Transfer of energy between kinetic and potential forms during vibration.
• Logarithmic Decrement: Decay of amplitude over time in a damped vibration.
• Factors Affecting Damping Ratio: Damping and frequency.
• Forced Vibration: Vibration occurring when an external force is continuously applied.
• Resonance: Point of maximum forced vibration amplitude, in phase with the exciting force.
• Inertia Force: Force required to displace a vibrating system from its equilibrium position.
• Resonant Frequency: Frequency at which a system naturally vibrates without external forces.
• Period: Time taken for one complete vibration cycle.
• Damping Ratio: Ratio of actual damping to critical damping.
• Beat Frequency: Difference in frequency between two interacting vibrations.
• Initial Conditions: Starting displacement and velocity of a vibrating system.
• Mode Shape: Spatial pattern of vibration exhibited by a structure at a particular mode.
• Underdamped System: System with a damping ratio less than one.
• Factors Affecting Natural Frequency: Mass and stiffness.
• Free Vibration: Motion of a swing moving back and forth freely.
• Frequency (from period): If a mass-spring system oscillates with a period of 2 seconds, its frequency is 0.5 Hz.
• Amplitude: Maximum displacement from equilibrium position during vibration.
• Magnification Factor: Ratio of forced vibration amplitude to exciting force amplitude.
• Beat Frequency (phenomenon): Occurs when an external force frequency is slightly different from the system's natural frequency.
• Damping: Energy lost by a vibrating system due to friction and dissipation.
• Logarithmic Decrement (time): Time taken for a system to reach 63.2% of its maximum displacement during a damped vibration.
• Damping Ratio (measure): Measures how quickly a vibrating system loses energy over time.