clear handwriting , no typing , show all work please!
clear handwriting , no typing , show all work please! A cast iron flywheel used for...
clear handwriting , no typing , show all work please! A steam engine runs at 150 r.p.m. Its turning moment diagram gave the following area measurements in mm? taken in order above and below the mean torque line: 500,- 250, 270, – 390, 190, – 340, 270, - 250 The scale for the turning moment is 1 mm 500 N-m, and for crank angle is 1mm = 5º. The fluctuation of speed is not to exceed + 1.5% of the...
clear handwriting , no typing , show all work please! The turning moment diagram for the engine is drawn to the following scales: Turning moment, 1 mm = 1000 N-m and crank angle, 1 mm = 6º. The areas above and below the mean turning moment line taken in order are : 530, 330, 380, 470, 180, 360, 350 and 280 mm2. The mean speed of the engine is 150 r.p.m. and the total fluctuation of speed must not exceed...
Show complete solutions. Show FBD diagram, label properly. Show formulas and their direct substitution. 67. Find the rim thickness for a cast iron flywheel with a width of 200 mm, a mean diameter f 1.2 in a normal operating speed of 300 rpm, a coefficient fluctuation of 0.05 and which is capable of hanging 3000 N-m of kinetic energy. Assume that the hub and arms represent 10% of the rim weight and the specific weight of cast iron is 7200...
clear handwriting , no typing , show all work please! An electric motor is mounted by means of gears on a mid span of a shaft rested between two bearings as shown in the figure. It is found that the motor suffers from vibration due to unbalance of 0.1 kg.m. The clearance between the armature and the stator is 1 mm. Design the diameter of the shaft such that when the motor vibrates the armature wont touch the stator at...
clear handwriting , no typing , show all work please! e.g.24 A vibrating system is analyzed and it is found that two successive oscillations have amplitudes of 3 mm and 0.5 mm respectively. Calculate the damping ratio.
clear handwriting , no typing , show all work please! e.g.23 An electric motor of 10 kg is suffering from vibration due to unbalance of 0.01 kg. m2. The stiffness coefficient of the isolator is k = 105 N/m. It is required to choose a value of 3 from the following table such that minimum Ft to the floor is required and the maximum amplitude of vibration for the motor mass is 0.001 m. S = 0.1, 0.3, 0.5, 0.7,0.8...
clear handwriting , no typing , show all work please! e.g.25 A mass of 5 kg is suspended on a spring and set oscillating. It is observed that the amplitude reduces to 5% of its initial value after 2 oscillations. It takes 0.5 seconds to do them. Calculate the following: i. The damping ratio. ii. The natural frequency. iii. The actual frequency. iv. The spring stiffness. v. The critical damping coefficient. vi. The actual damping coefficient.