An unbalanced small motor with me=1.2 kg.m is directly bolted to a machine with a mass of 500 kg. The machine is attached to the floor using an isolator with k-75000 N/m, e=1850 Ns/m (Weight of the motor is neglected.) a) Determine that how much percent of the force is transmitted to the floor if motor turns with n-250 rpm. b) Determine the rotation speed of the motor corresponding to the damped natural frequency of the system. e) Determine the vibration displacement amplitude at the speed calculated in part b). d) For 100 % force transmission, what would be the natural frequency of the system?

An unbalanced small motor with me=1.2 kg.m is directly bolted to a machine with a mass of 500 kg. The machine is attached to the floor using an isolator with k-75000 N/m, e=1850 Ns/m (Weight of the motor is neglected.) a) Determine that how much percent of the force is transmitted to the floor if motor turns with n-250 rpm. b) Determine the rotation speed of the motor corresponding to the damped natural frequency of the system. e) Determine the vibration displacement amplitude at the speed calculated in part b). d) For 100 % force transmission, what would be the natural frequency of the system?

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

See similar textbooks

Similar questions

Find the speed of shaft driven with the belt by an engine running at 600RPM. The thicknessof belt is 2cm, diameter of engine pulley is 100cm and that of shaft is 62cm..
pleassssse solve question 7, statics
1.Find out by direct derivation the relation between a spring's effective and actual mass. 2. Is it the same of a static measurement of k as it is for a dynamic measurement?
A flywheel absorbs 2500 ft-lb of energy at a coefficient of fluctuation of 0.10. The mean diameter of the flywheel is 72 inches. The weight of the arms and hub is 12 % of the rim weight. The mean rim speed is 80 fps. Consider the specific weight of the flywheel as γ = 0.26 lb/in3. A. Find the mean rpm of the rim. B. Determine the weight of the rim. C. What is the cross sectional area of the rim?
The equivalent spring stiffness of an inclined spring whose k = 5 N/m and angle of inclination θ = 35° 3.355 N/m 4.095 N/m 5.867 N/m 4.511 N/m
1. A pulley 580 mm in diameter transmits 60 kW at 650 1pm by means of belt. Determine the effective belt pull.2. Find the angle of contact on the small pulley for a belt drive with center distance of 75 in. if pulley diameters are 9 in and 18 m, respectively.
A washing machine has 60 kg mass, and 15 cm tub radius. Machine dries the unbalanced3 kg laundry by rotating with 1000 rpm.a) What would be the dynamic force transmitted to the foundation if there is no vibrationisolation for the machine?b) An isolation with damping ratio 0.1 is applied to the machine. In this case, if thetransmitted force is decreased by 90 % what would be the natural frequency of the machine?c) In this case, what would be the vibration amplitude of the machine?
A punching machine requires 1600 ft-lb of energy to punch a certain hole. During the punching operation, the speed of the machine is reduced from 180 rpm to 160 rpm. The weight of the arms and hub is considered to be 10 % of the rim weight, and the mean diameter of the flywheel is 32 inches. a) What is the mean or operating rpm of the flywheel? b) Find the coefficient of fluctuation. c) What is the maximum speed of the flywheel, in fps? d) What is the minimum speed of the rim, in fps? d) Determine the weight of the rim, in lb. e) What is the weight of the flywheel, in lb? f) Determine the weight of the arms and hub, in lb.
A belt drives a pulley of 200mm diameter such that the ratio of tensions in the tight side and slack side is 1.2. If the maximum tension in the belt is not to exceed 240KN. Find the safe power transmitted by the pulley at a speed of 60rpm.
1) An electric motor’s torque is a function of the speed at which it rotates. Many brushed AC motors have a linear toque curve as shown below. If the power output of the motor is equal to the torque (T) multiplied by the rotational speed in rad/s (w), what is the maximum power you can get out of the motor if the stall torque (Tstall) is 0.001 Nm and the no load speed (wno load) of 10,500 RPM? Give answer in Watts.
A spring has a mass of 10 kg, is underdamped with coefficient β = 5 and its frequency is 0.8 Hz. Spring starts 30 cm from equilibrium position and is released with a velocity of −10 cm / s. Find the value of k.
For the given maximum and minimum speed as 136 r.p.m and 112 r.p.m respectively .Then the coefficient of fluctuation of speed will be