8 Q2: A shaft is driven by a motor which exerts a constant torque while the load taken off the shaft fluctuates from zero to maximum during each revolution. If the maximum fluctuating in energy in one cycle is AE=242 N.m. Find the moment of inertia of the flywheel (1) to be mounted on the shaft so that the speed fluctuating shall not be more than 3 r.p.m. above or below a .mean speed of N=200 r.p.m

8 Q2: A shaft is driven by a motor which exerts a constant torque while the load taken off the shaft fluctuates from zero to maximum during each revolution. If the maximum fluctuating in energy in one cycle is AE=242 N.m. Find the moment of inertia of the flywheel (1) to be mounted on the shaft so that the speed fluctuating shall not be more than 3 r.p.m. above or below a .mean speed of N=200 r.p.m

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter11: Columns

Section: Chapter Questions

Problem 11.2.4P: Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m.

See similar textbooks

Similar questions

A wheel with rotational inertia 48 kg.m2 is mounted on a fixed, frictionless axle. The angular speed of the wheel is increased from zero to 59 rad/s in 12-s. What is the average net torque/Moment in N.m on the wheel during this time interval?
Prob # 8. If the inertia is 80 lb-ft2, and the speed of the driven shaft is to be increased from 0 to 1500 rpm in 3 seconds. Calculate the heat generated for each engagement if clutch starting torque is 10 in-lb. a. 20.50 Btu b. 41.50 Btu c. 30.50 Btu d. 51.50 Btu
In case of a single cylinder double acting steam engine, 180 kW power is being developed at a mean speed of 120 r.p.m. The coefficient of fluctuation of energy is 0.12. The fluctuation of speed is ± 2% of mean speed. The flywheel rim has mean diameter of 2 metre. The hub and spokes of the flywheel provide 8% of the rotational inertia of the flywheel. If the density of the flywheel material is 7200 kg/m3, determine the mass and cross-sectional area of the flywheel rim.
Q3/ A vertical double acting steam engine develops 80 kW at 240 rpm. The maximum fluctuation of energy is 25% of the work done per stroke. The maximum and minimum speeds are not to vary more than +1% of the mean speed. Find the mass of the flywheel, if the radius of gyration is 0.65 m.
In the case of circular shaft subjected to pure torsion nonzero are: (a)Nx (b)Nx and Vy (C)Mz and Vy (D)Nx and My (E)My andVz (F)Mx
B 2 ~s A single cylinder reciprocating engine has speed 240 rp.m., stroke 3 mm, mass of re ocating parts 50 kg, mass of revolving parts at 150 mm radius 37 kg. UMOO third of the reciprocating parts and all the revolving parts are to be balanced, find : 1. The bala,;: mass required at a radius of 400 mm, and 2. The residual unbalanced force when the crank g rotated 60° from inner dead centre. P e AN R eR e e g
Consider a double hook, thaving intermediate shaft of moment of inertia 3 g-m², the input and output shaft of which are in clined at 30° to intermediate shaft. The input shaft rotates uniformly at 2400 rpm with steady torque of 300 N.m., determine max. fluctuation in output torque.
A single cylinder horizontal engine runs at 120 r.p.m. The length of stroke is 400 mm. The mass of the revolving parts assumed concentrated at the crank pin is 100 kg and mass of the reciprocating parts is 150 kg. Determine the magnitude of the balancing mass required to be placed opposite to the crank at a radius of 150mm which is equivalent to all the revolving and 2/3rd of the reciprocat- ing masses. If the crank turns 30° from the inner dead centre, find the magnitude of the unbalanced force due to the balancing mass.
Two shafts, one solid the other one hollow, are connected end to end by meansof a coupling in which there are 8 screws on the pitch diameter D = 250 mm.The solid shaft has diameter d = 50 mm and transfers the power P = 500 kW at 75 rev/s.The external diameter of the hollow shaft is dex = 75 mm.Note: All parts of the system must be equally strong, and able to transfer the requiredpowerCalculate:(a) The internal diameter di of the hollow shaft(b) The diameter of the bolts db connecting the two shafts(c) If the hollow shaft has to be replaced by a rectangular hollow cross-section withouter dimensions b x h and uniform wall thickness of 4 mm.Calculate the values b, h while following the request to keep h = 2b
The corediameter of the double start square threaded screw having a pitch of 12mm is 50 mm. A load of 18kN is lifted through a distance of 180mm. Find the work done(in Joule)in lifting the loadand the efficiency of the screw, when 1. The load rotates with the screw, and 2. The load rests on the loose head which does not rotate with the screw. The external and internal diameter of the bearing surface of the loose head are 60 mm and 10 mmrespectively. The coefficient of friction for the screw is 0.11,whilefor the bearing surface is 0.13.
A multi-cylinder engine is to run at a speed of 600 r.p.m. On drawing the crank-effort diagram to scale of 1 cm 2452.5 N-m and I cm 30°, the areas above and below the mean torque line in sq.cm. are as follows: +1.6, -1.72, +1.68, -1.91, +1.97 and -1.62. The speed is to be kept within ±1% of the mean speed of the engine. Calculate the necessary moment of inertia of the flywheel. Determine the suitable dimensions of a rectangular flywheel rim, if the breadth is twice the thickness. The density of the cost- iron is 725 gm/cm' and its hoop stress is 588.6 N/cm2. Assume that the rim contributes 92% of the flywheel effect.
e g O single cylinder reciprocating engine has speed 240 rp.m., stroke 3 mm, mass of reciprocating parts 50 kg, mass of revolving parts at 150 mm radius 37 kg, I MUO third of the reciprocating parts and all the revolving parts are to be balanced, find : 1. The bala,:A mass required at a radius of 400 mm, and 2. The residual unbalanced force when the crapg h; rotated 60° from inner dead centre. T e T g LSOt ULy A PO Eangt