Mechanics of Machines-II Lecture No-48 Critical speed of shafts

These are a series of lectures on Mechanics of Machines delivered by Dr. K. Pannir selvam to students of the Department of Mechanical Engineering in NIT-Trichy in the year 2017.

[@cesarmaravi7915]

Thank you sir for making making/uploading this series of videos. They have been of great help to understand this concepts. Greetings from Peru.

[@jitendraitankar]

You are a great teacher sir, happy to listen to this lecture!!

[@duabariaziaka6888]

This is amazing! Thank you so much

[@AbdulHameed-iq4hs]

Excellent explanation for Critical speed. This is a very important topic for Mechanical Engineers,

[@Jayanthmagge]

Amazing Teaching skill Sir, Really I liked way of Teaching...

[@mdnahidhassanonid6539]

Thank you sir, that was amazing

[@NeerajSingh-uu1pe]

Amazing 😃 thankyou

[@lakshyajit2438]

Great explanation...

[@roshandhikale2385]

Amazing sir all are understood

[@rahulbhangare3750]

Very nice video sir..thank u

[@smitboraniya6752]

very nice video.
best teaching and explaining skills.
I am very happy and satisfied after seeing this lecture, Thank you sir!

[@prabakaranprabu9768]

very nice video thank you

[@142_soorajmohanan9]

wonderfully explained sir

[@Akshaymate47]

Thank you sir easy to understand

[@rupalisonawane9924]

Thank you sir

[@rajeswarisampathkumar9598]

thankyou sir

[@onlinetechstudio]

Good Video

[@hamanverma96]

Thank you sir,aap pahle hi question SE SURU kr rhe vo accha tha sir.

[@nishikantshinde2415]

Nice sir

[@Z06Wingo]

Critical speed is the bending moment of a shaft when the rotation of that shaft coincides with the natural frequency of the said shaft.

[@ufficiotecnicolibertylines5167]

Great lesson! But what if the shaft is long enough on one side and host a propeller for instance? How do I take in consideration this additional sort of "Cantilever" component?

[@ashwineenarware828]

Nptel need this teacher exilant teaching skills

[@sudarshantope9477]

👍

[@nellvincervantes3223]

Struggling with this question about crit speed.
A horizontal shaft rotates in bearings at its ends. At its midpoint is keyed a disk weighing 40 lbs, whose center of gravity is 0.1 inch from the axis of rotation. If a static force of 200 lbs deflects the shaft and disk through 0.1 inch, determine the critical speed of rotation of the shaft.
The answer key said its 547 rpm but couldnt get the solution for this.

[@narayansikhwal8774]

Well understood sir

[@aminamina-wz4tu]

هل يوجد عربي مثلي ؟

[@aminamina-wz4tu]

Y a t'il un Arabe ?!

[@sanketdargude5123]

Thank u sir

[@surajshinde7483]

Nice sir

[@_Shadow_Fighter_]

👍