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Recent questions and answers in Vibrations
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GATE2020-ME-2: 7
The equation of motion of a spring-mass-damper system is given by $\dfrac{d^2x}{dt^2}+3 \dfrac{dx}{dt} +9x = 10 \sin(5t)$ The damping factor for the system is $0.25$ $0.5$ $2$ $3$
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Sep 18, 2020
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go_editor
5.0k
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gateme-2020-set2
effect-of-damping
vibrations
applied-mechanics-and-design
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0
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GATE2018-2-7
In a single degree of freedom underdamped spring-mass-damper system as shown in the figure, an additional damper is added in parallel such that the system still remains underdamped. Which one of the following statements is ALWAYS ... will increase Transmissibility will decrease Time period of free oscillations will increase Time period of free oscillations will decrease
Arjun
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Vibrations
Feb 17, 2018
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Arjun
27.4k
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gateme-2018-set2
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GATE2018-1-40
A machine of mass $m=200 \: kg$ is supported on two mounts, each of stiffness $k=10 \: kN/m$. The machine is subjected to an external force (in $N$) $F(t) = 50 \cos 5t$. Assuming only vertical translatory motion, the magnitude of the dynamic force (in $N$) transmitted from each mount to the ground is _________ (correct to two decimal places).
Arjun
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Vibrations
Feb 17, 2018
by
Arjun
27.4k
points
gateme-2018-set1
numerical-answers
vibrations
applied-mechanics-and-design
0
answers
0
votes
GATE2015-3-19
Which of the following statements are TRUE for damped vibrations? P. For a system having critical damping, the value of damping ratio is unity and system does not undergo a vibratory motion. Q. Logarithmic decrement method is used to determine the amount of damping in a physical ... proportional to the square of relative velocity. P and Q only P and S only P, Q and R only Q and S only
Arjun
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Vibrations
Feb 24, 2017
by
Arjun
27.4k
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gateme-2015-set3
effect-of-damping
vibrations
applied-mechanics-and-design
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answers
0
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GATE2015-3-28
Figure shows a single degree of freedom system. The system consists of a massless rigid bar $OP$ hinged at $O$ and a mass $m$ at end $P$. The natural frequency of vibration of the system is $f_n=\displaystyle{\frac{1}{2\pi }\sqrt{\frac{k}{4m}}} \\$ ... $f_n=\displaystyle{\frac{1}{2\pi }\sqrt{\frac{2k}{m}}}$
Arjun
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Vibrations
Feb 24, 2017
by
Arjun
27.4k
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gateme-2015-set3
vibrations
applied-mechanics-and-design
0
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0
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GATE2015-2-36
A single-degree-freedom spring-mass system is subjected to a sinusoidal force of $10$ $N$ amplitude and frequency $ω$ along the axis of the spring. The stiffness of the spring is $150$ $N/m$, damping factor is $0.2$ and the undamped natural frequency is $10ω$. At steady state, the amplitude of vibration (in $m$) is approximately $0.05$ $0.07$ $0.70$ $0.90$
Arjun
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Vibrations
Feb 24, 2017
by
Arjun
27.4k
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gateme-2015-set2
effect-of-damping
vibrations
applied-mechanics-and-design
0
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0
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GATE2015-2-10
In a spring-mass system, the mass is m and the spring constant is $k$. The critical damping coefficient of the system is $0.1$ $kg/s$. In another spring-mass system, the mass is $2m$ and the spring constant is $8k$. The critical damping coefficient (in $kg/s$) of this system is ____________
Arjun
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Vibrations
Feb 24, 2017
by
Arjun
27.4k
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gateme-2015-set2
numerical-answers
effect-of-damping
vibrations
applied-mechanics-and-design
0
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0
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GATE Mechanical 2014 Set 3 | Question: 8
Consider a single degree-of-freedom system with viscous damping excited by a harmonic force. At resonance, the phase angle (in degree) of the displacement with respect to the exciting force is $0$ $45$ $90$ $135$
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Feb 19, 2017
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Arjun
27.4k
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gateme-2014-set3
effect-of-damping
vibrations
applied-mechanics-and-design
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