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numerically simulate the response of an undamped system to a ramp input of the form ft f0nbspt where f0nbspis a
i respond to discussion 150 words minimumvariable and constant are two commonly used mathematical concepts simply put a
a couple of moment m 2 knm is to be applied to the end of a steel bar determine the maximum stress in the bara if the
what natural frequency must a hand drill have if its vibration must be limited to a minimum rms displacement of 10 mum
a 100-kg machine is supported on an isolator of stiffness 700 x 103nbspnm the machine causes a vertical disturbance
a harmonic force of maximum value 25 n and frequency of 180 cyclesgtmin acts on a machine of 25 kg massdesign a support
consider a machine of mass 70 kg mounted to ground through an isolation system of total stiffness 30000 nm with a
draw the shear and bending-moment diagrams for the beam and loading shown and determine the maximum absolute valuea of
knowing that w 12 kn draw the shear and bending-moment diagrams for beam ab and determine the maximum normal stress
assuming that the reaction of the ground is uniformly distributed draw the shear and bending-moment diagrams for the
a 350-kg rotating machine operates at 800 cyclesgtmin it is desired to reduce the transmissibility ratio by one-fourth
the c-shaped steel bar is used as a dynamometer to determine the magnitude p of the forces shown knowing that the cross
the couple m is applied to a beam of the cross section shown in a plane forming an angle b with the vertical determine
a 68-kg electric motor is mounted on an isolator of mass 1200 kg the natural frequency of the entire system is 160
a vertical force p is applied at point c located on the axis of symmetry of the cross section of a short column
a vertical rod is attached at point a to the cast iron hanger shown knowing that the allowable stresses in the hanger
a short column is made by nailing four 1 x 4-in planks to alpha 4 x 4-in timber using an allowable stress of 600 psi
a rotating machine weighing 4000 lb has an operating speed of 2000 rpmit is desired to reduce the amplitude of the
an offset h must be introduced into a metal tube of 075-in outer diameter and 008-in wall thickness knowing that the
the instrument board of an aircraft is mounted on an isolation pad to protect the panel from vibration of the aircraft
design a base isolation system for an electronic module of mass 5 kg so that only 10 of the displacement of the base is
calculate the damping ratio required to limit the displacement transmissibility to 4 at resonance for any damped
a w200 x 313 rolled-steel beam is subjected to a couple m of moment 45 knm knowing that e 200 gpa and n 029
a using an allowable stress of 120 mpa determine the largest couple m that can be applied to a beam of the cross