Indicate the differences between the rigid rotor and elastic rotor models, between the frequency of two adjacent lines.
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Indicate the differences between the rigid rotor and elastic rotor models, between the frequency of two adjacent lines.
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- In the rigid rotor and elastic rotor models, comment on the differences between the expressions corresponding to the frequencies of the first 5 rotation levels.Two identical 2000 kW alternator operates in parallel. The governor of the first machine is such that the frequency drops uniformly from 50 Hz at no-load to 48 Hz at full-load. The corresponding uniform speed drop of the second machine is 50 Hz to 47.5 Hz, What is the maximum load that can be delivered without overloading either machine?Suppose we have determined that the lowest natural frequency of a particular helical compression spring is 20286 rpm. According to the prescription in our book and according to the presentation in class, find the highest recommended operating frequency of a machine that utilizes this spring. Give your answer in rpm, but do not include units--Blackboard will not understand
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- A horizontal split case pump with a single impeller shows a predominant vibration reading at a frequency of 1x the rotational speed of the pump and a lower vibration at a frequency of 2x the rotational speed. The impeller is centrally located between two bearing housings. There is a phase difference of 180º between the axial readings and the radial (horizontal) readings taken at the bearing housings. What do you suspect the cause of the high vibration is?Given the information for a motor, determine its LCC in term of present worth (in $). Annual discount rate (i.e. interest rate): 10% Life time: 5 years Initial cost: $6500 Energy usage: $500/year Maintenance cost: $400/year Salvage value: $500 A 9601 B 11471 с 11068 D 12170 E 10625Piston (M=5kg) is driven when the fly wheel (r=0.1m, J=0.5kgm^2) moves the arm (L=0.2m,m=1kg). The stiffness k=100N/m come Fron compression of gas. What is the natural frequency of the system
- hand written plz Q4(a) A 30 kW cooler machine runs at a speed of 4000 RPM One of the bearings is suspected with severe damage due to the high vibration. The bearing specifications: bearing diameter is 66 mm, ball diameter is 4 mm, number of balls is 15, and contact angle is 1 degree. Determine the following: (i) Ball passing frequency inner race; Ball passing frequency outer race; Ball passing frequency cage race: Bad misalignment. (iii) (iv)Write the units of coefficient of viscous damping force.tomorrow i have exam, i need basic understaning on Torsional Oscillations of single rotor with viscous damping . please give a good explation and details to help me understand.