O Macmillan Learning Industrial processes often require the damping of vibrations. Consider a workbench that uses four large ideal springs in place of traditional legs, with each spring supporting one corner of the workbench and exhibiting a force constant of k = 47500 N/m. This workbench is used when creating products that involve highly unstable chemicals. According to specifications, the acceleration of the manufacturing equipment must be held to less than 21.6 m/s² for the manufacturing process to proceed safely. The amplitudes of vibrations are expected to remain under 0.592 mm throughout. Given that the workbench and maufacturing equipment have a combined mass of m= 5.95 kg, find the maximum acceleration amax expected of the equipment and workbench. Ignore the mass of the springs. Omax = Does the workbench meet the specifications for acceleration? yes no m/s² An engineer decides to damp the oscillations by applying one shock absorber to each spring. These shock absorbers apply a that oppores the motion of the bench. For proper damping, the engineer decides that the F

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Industrial processes often require the damping of vibrations.
Consider a workbench that uses four large ideal springs in place of traditional legs, with each spring supporting one corner of
the workbench and exhibiting a force constant of k = 47500 N/m. This workbench is used when creating products that involve
highly unstable chemicals. According to specifications, the acceleration of the manufacturing equipment must be held to less
than 21.6 m/s² for the manufacturing process to proceed safely. The amplitudes of vibrations are expected to remain under
0.592 mm throughout. Given that the workbench and maufacturing equipment have a combined mass of m= 5.95 kg, find the
maximum acceleration amax expected of the equipment and workbench. Ignore the mass of the springs.
@max =
Does the workbench meet the specifications for acceleration?
yes
no
m/s²
An engineer decides to damp the oscillations by applying one shock absorber to each spring. These shock absorbers apply a
velocity-dependent drag force F = -bu that opposes the motion of the bench. For proper damping, the engineer decides that the
motion of the bench should drop to half-amplitude within 0.479 s. In other words, within 0.479 s, the amplitude of motion
should drop by a factor of one half. When purchasing shock absorbers, what damping coefficient b should the engineer specify
to the industrial equipment supplier? Assume that the oscillations are underdamped.
b =
kg/s
Transcribed Image Text:Macmillan Learning Industrial processes often require the damping of vibrations. Consider a workbench that uses four large ideal springs in place of traditional legs, with each spring supporting one corner of the workbench and exhibiting a force constant of k = 47500 N/m. This workbench is used when creating products that involve highly unstable chemicals. According to specifications, the acceleration of the manufacturing equipment must be held to less than 21.6 m/s² for the manufacturing process to proceed safely. The amplitudes of vibrations are expected to remain under 0.592 mm throughout. Given that the workbench and maufacturing equipment have a combined mass of m= 5.95 kg, find the maximum acceleration amax expected of the equipment and workbench. Ignore the mass of the springs. @max = Does the workbench meet the specifications for acceleration? yes no m/s² An engineer decides to damp the oscillations by applying one shock absorber to each spring. These shock absorbers apply a velocity-dependent drag force F = -bu that opposes the motion of the bench. For proper damping, the engineer decides that the motion of the bench should drop to half-amplitude within 0.479 s. In other words, within 0.479 s, the amplitude of motion should drop by a factor of one half. When purchasing shock absorbers, what damping coefficient b should the engineer specify to the industrial equipment supplier? Assume that the oscillations are underdamped. b = kg/s
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