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Dynamics Of Machinery

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Prove that $wp = wn \sqrt{1- 2 \zeta^2}$
dynamics of machinery updated 6.7 years ago by sfggh • 0
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At what speeds will the steady state amp of torsional oscillations of the disc of the system be less than 2 degree?
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A 30 kg compressor is mounted on an isolator pad of stiffness $6 \times 10^5 Nm^{-1}$ When subjected to a harmonic excitation of magnitude 350 N and frequency $100rad^{-1}$,
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A 65 kg electric motor is placed at the end of a 1.3m steel (having $E = 210 \times 10^9 N/m^2)$
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A machine of 20kg mass is mounted on a spring and damper with spring stiffness 8KN/m and damping coefficient 130 Ns/m.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A thin disc of mass 0.8kg and radius 60 mm is attached to the end of 1.2 m steel shaft of dia. 20mm. The disc is subjected to harmonic torque of amplitude 12.5 Nm at a frequency 700 rad/sec.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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For what excitation frequencies will the steady state amp. Of the machine of fig. be less than 1.5mm.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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Determine the steady state amp. Of pump at harmonic excitation of maximum value of 1.5KN.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A machine weighing 1100 N has a rotor 220N with 5mm eccentricity. The operating speed is 600 rpm, the machine is mounted on springs with stiffness 88 KN/m.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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Find the maximum permissible unbalanced in order to limit the steady state deflection to 5mm peak to peak.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A tail rotor section of the helicopter consistent of four blades, each of mass 2.3 kg and an engine box of mass 28.5 kg. The centre of gravity of each blade is 170 mm from the rotational axis.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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Derive the equation of motion and find the steady state displacement of mass m.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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Derive equation of motion and steady state amplitude of mass.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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Determine the steady state amplitude of the system shown.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A vehicle has mass of 1200 kg. the suspension system has a spring const. of 400 KN N/m and damping ratio of 0.5. If the vehicle speed is 20 km/hr. determine (x) the disp amplitude of the vehicle.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A vehicle of mass 1200 kg is travelling on a road the surface of which varies sinusoidally with an amplitude of 0.05m and wave length of 6m.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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The spring of an automobile trailer is compressed by 0.1m under its own weight of 500 kg. find the critical speed, When the trailer is travelling over a road with a profile approx.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A 35 kg flow monitoring device is placed on a table in a laboratory. A pad of stiffness $2 \times 10^5$ N/m and damping ratio 0.08 is placed between the apparatus and the table.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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An engine is mounted on four rubber pads such that the static deflection is 5mm. if the mass of the engine and coupling is 300kg at what speed motor run for 95% isolation?
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A huge machinery is mounted on a bed plate which is supported on four elastic members, each having stiffness $3.92 \times 10^6 N/m$ the total mass to be supported is 1 to n.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A machine 100kg mass has a 20kg rotor with 0.5mm eccentricity.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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An air conditioner weighs 1115N and is driven by a motor at 500 rpm. What is the required static deflection of an undamped isolator to achieve 80% isolation?
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A 100 kg turbine operates at 2000 rpm, What percent isolation is achieved if the turbine is mounted on four identical springs in parallel each of stiffness $3 \times 10^5 N/m$
dynamics of machinery updated 6.7 years ago by sfggh • 0
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A refrigerator weighing 30 kg is to be supported by three springs each having stiffness of K (N/m) if the unit operates at 580 rpm,
dynamics of machinery updated 6.7 years ago by sfggh • 0
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Case 5: vibration measuring instrument.
dynamics of machinery updated 6.7 years ago by sfggh • 0
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