A machine and its foundation weigh is 10x(L) kN. The spring constant and the damping ratio of the soil supporting the foundation may be taken as (L)x10³ kN/m and c = (L)x10² kN-s/m. Forced vibration of the foundation is caused by a force that can be expressed as determine: Q (kN) = (L) sin2nt L=6 Determine: (a) amplitude of motion during machine vibration, (b) maximum dynamic force transmitted to the subgrade during machine vibration. (c) the type of system and its frequency after turning off the machine, and (d) the ratio of two successive amplitudes after turning off the machine.
A machine and its foundation weigh is 10x(L) kN. The spring constant and the damping ratio of the soil supporting the foundation may be taken as (L)x10³ kN/m and c = (L)x10² kN-s/m. Forced vibration of the foundation is caused by a force that can be expressed as determine: Q (kN) = (L) sin2nt L=6 Determine: (a) amplitude of motion during machine vibration, (b) maximum dynamic force transmitted to the subgrade during machine vibration. (c) the type of system and its frequency after turning off the machine, and (d) the ratio of two successive amplitudes after turning off the machine.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:A machine and its foundation weigh is 10x(L) kN. The spring constant and the damping ratio of the soil
supporting the foundation may be taken as (L)x10³ kN/m and c = (L)x10² kN-s/m. Forced vibration of the
foundation is caused by a force that can be expressed as determine:
Q (kN) = (L) sin2nt
L=6
Determine:
(a) amplitude of motion during machine vibration,
(b) maximum dynamic force transmitted to the subgrade during machine vibration.
(c) the type of system and its frequency after turning off the machine, and
(d) the ratio of two successive amplitudes after turning off the machine.
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