A rotating machine of mass M = 100 kg has an unbalanced mass m = 0.2...

 

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A rotating machine of mass M = 100 kg has an unbalanced mass m = 0.2 kg a dis- tance r = 0.5 m from the center of rotation. (The mass M includes mass m.) The oper- ating speed is 10 Hz. Suppose that the machine is mounted on an isolator consisting of a spring and damper, as shown in Figure 9-43. If it is desired that ? be 0.2, specify the spring constant k such that only 10% of the excitation force is transmitted to the foun- dation. Determine the amplitude of the transmitted force. Figure 9-43 Rotating machine mounted k b A rotating machine of mass M = 100 kg has an unbalanced mass m = 0.2 kg a dis- tance r = 0.5 m from the center of rotation. (The mass M includes mass m.) The oper- ating speed is 10 Hz. Suppose that the machine is mounted on an isolator consisting of a spring and damper, as shown in Figure 9-43. If it is desired that ? be 0.2, specify the spring constant k such that only 10% of the excitation force is transmitted to the foun- dation. Determine the amplitude of the transmitted force. Figure 9-43 Rotating machine mounted k b