1₁ The natural un-damped frequency of a SDOF system is the frequency of the system when: A It vibrates under the action

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1 The Natural Un Damped Frequency Of A Sdof System Is The Frequency Of The System When A It Vibrates Under The Action 1 (33.32 KiB) Viewed 31 times

1₁ The natural un-damped frequency of a SDOF system is the frequency of the system when: A It vibrates under the action of no force b. It vibrates under the action of a harmonic force e. It vibrates with Coulomb damping d. It does not vibrate The number of natural frequencies of a system is corresponding to: a. The number of independent coordinates describing the system b. The number of dependent coordinates describing the system C. The number of masses in the system d. The number of springs in the system 3. When two springs K, and K, connected in series the equivalent stiffness is: a. K-K+K, b. K-K,K₂/(K,+K₂) c. K-(K,+K₂)/3 d. None of the above 4. For the system shown in Figure 1, calculate the equivalent stiffness of the system and its natural frequency for k-3x10² -210 x 10 N/m² 1-16x 10³ m Figure (1) 150 kg