To control the vibration of a 1DOF oscillator consisted of mass m = 100 kg and...

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To control the vibration of a 1DOF oscillator consisted of mass m = 100 kg and spring k = 10 kN/m, a detuner is used. It is known that the mass of the detuner m = 30 kg. Determining the stiffness of the detuner spring k for the following excitation conditions: Case 1: periodic force applied on m at 5 Hz; Case 2: impact force applied on m. Hint: impact force excites the vibration at resonance frequency. F k m m V.x To control the vibration of a 1DOF oscillator consisted of mass m = 100 kg and spring k = 10 kN/m, a detuner is used. It is known that the mass of the detuner m = 30 kg. Determining the stiffness of the detuner spring k for the following excitation conditions: Case 1: periodic force applied on m at 5 Hz; Case 2: impact force applied on m. Hint: impact force excites the vibration at resonance frequency. F k m m V.x