mecademie

@razor1887 Ай бұрын

you have no idea how much youre saving me thank you

@servetyasar5520 Ай бұрын

Excellent explanation. Thank you sir...

@ItsHidden07 2 ай бұрын

Hey Can you tell me how to make 2nd inversion in motion gen and find the velocity and acceleration of all links and points pls tell me fast I have to submitted in this monday

@mecademie 2 ай бұрын

Watch this video to learn how to find velocities for any linkage.

@mecademie 2 ай бұрын

This video: kzbin.info/www/bejne/r3vMl6iXlrqbjpI

@ItsHidden07 2 ай бұрын

@@mecademie sir I am working on a problem of 2nd inversion of slider mechanisms and I had already found out the velocities and acceleration but now I need to simulate the mechanisms and find the velocities and acceleration using a software or a website so can u pls tell me how to do that

@ItsHidden07 2 ай бұрын

Pls tell me how to make gnome engine mechanism means 2nd inversion of slider crank mechanism and find out the velocities and acceleration of all links and point using any software or website

@SubtleMechE999 2 ай бұрын

yo this was actually very helpful!

@mecademie 2 ай бұрын

You can find such lessons in this course: www.udemy.com/course/theory-of-machines-velocity-analysis-using-relative-method/?referralCode=E0F034195FA7C8AC81D7

@himanshuadhinayak 2 ай бұрын

Good❤

@tushar14kurre 2 ай бұрын

I am one 😂

@AmirSayadiChannel 2 ай бұрын

Wonderful 🙏

@raineyyri 2 ай бұрын

Sir, under the special case of l+s=p+q opposite no change point, what are the machines that are using that mechanism? Thankyou for the response

@raineyyri 2 ай бұрын

Can u please give us an example measurement for the Opposite (No change point)?

@mecademie 2 ай бұрын

Have you watched this one? kzbin.info/www/bejne/rpyToJagebype7s

@albokh 4 ай бұрын

pls rotate me like that😭😭

@atharvkharade1236 5 ай бұрын

Thank you so much sir, it was really helpful 😊

@betiabidabad7367 5 ай бұрын

thank you for the video but is there a way to find the moment on O2 ?

@SALIFYANJISIMUKOKO-gv3kz 5 ай бұрын

What software do you use to make such animation?

@mecademie 5 ай бұрын

No commercial software or tool is used. It is developed directly in C#.

@ahmadarif63 6 ай бұрын

Sir do u have email I'd. ?

@ap666-o8h 7 ай бұрын

Nice animations, one question, what tool do you use to create those nice animations?

@mecademie 7 ай бұрын

Animations are provided by a simulation software I developed using C++ and OpenGL. No commercial simulation engine has been used. Assets are created in AutoCAD and then imported to my simulation software. The screen recordings from the view of my software has been done using ScreenPal. Check my new magic whiteboard (developed using JavaScript) here: kzbin.info/www/bejne/hIeupnyaodmEa6s

@nima.shokouhfar 7 ай бұрын

RESPECT....!!! Animations are great....!!!

@tarunnallur8834 8 ай бұрын

Fantastic video mate! Clearly shown and explained. :) Thanks heaps.

@krislyncorpuz6004 8 ай бұрын

Do you have sample file for this in LS DYNA? Thank You

@averypalmer9333 8 ай бұрын

Is there any way to control with certainty whether or not the follower linkage in the change point mechanism will make a full rotation every time?

@danielrosalez5383 9 ай бұрын

Shouldn’t the ground be considered a link?

@mecademie 9 ай бұрын

If we consider the ground as a link, then we needed to add a rigid constraint to fix it.

@paultabalak4362 9 ай бұрын

bravo,, bravo,,,,, génial

@rhylanehajar5740 11 ай бұрын

Dear doctor Shahram Shokoufar i'm trying also to simulate rolling contact exactly like it your video using ANSYS APDL, but the motion of the wheel is not as was expected (rolling) while the track is moving in longitudinale direction. In my case the track move in a good direction but the wheel fly i think i have a problem in definition of DOF constraints. could you help me please sir to know where is the issue in my simulation? best regards

@mecademie 11 ай бұрын

The constraints to limit the DOF are applied to the tire rim. Rotation about wheel axis is free. Also vertical motion is free because the tire is subject to vertical load and need to deflect.

@rhylanehajar5740 11 ай бұрын

@@mecademieThank you so much doctor for your rich answer i was thinking that the dof was applied to the pilot node at wheel center, just i need to ask you also doctor some questions if it is possible because im really interessted in the rolling mecanics.

@mecademie 11 ай бұрын

@@rhylanehajar5740Feel free to ask questions. I will be happy if I can answer.

@rhylanehajar5740 11 ай бұрын

Your simulation is brilliant ❤ sir! Please, i can understand from the video is that you defined two steps: first step is in which the axle load is applied and the second one is step in which you applied longitudinal translation of the wheel and rotation obout its axis right? Just i tried to do same but sir i couldn't rich to similar rolling behavior. Can i know sir just which motions you constrained for the pilot node and which ones are free? Thank you so much for your support sir 🙏🏻

@mecademie 11 ай бұрын

Among 6 DOF of the tire "rim" (which is a rigid body) only rotation about rim axis, vertical (z-axis) motion, and longitudinal (x-axis) (for towing) is allowed. For more info, you can review my PhD dissertation from: spectrum.library.concordia.ca/id/eprint/982468/

@rhylanehajar5740 11 ай бұрын

@@mecademie Thank you so much sir for your rich response. Please sir if it is possible to give me the link to your PhD. Also if it is possible sir to help me from your experience to do my simulation. I'm trying to simulate rolling wheel using ANSYS apdl but the problem I have is that in results I found are not as shown in your video. The wheel don't roll.and I doubt in boundary conditions I applied. If there is a way to contact you sir maybe you can give me important advice about my simulation.

@autopack20 11 ай бұрын

Certainly, you've effectively illustrated the operation of the crank rocker. However, I must point out two significant deficiencies in your design. Firstly, the pivotal error lies in the inadequate center distance between the cranks, deviating from the established principles governing crank design. Secondly, a substantial oversight is evident in the insufficient length of the connecting rod. This deficit in length introduces dual drawbacks to the design. Firstly, the shortened rod disrupts the equilibrium of the oscillating crank, tilting it disproportionately to the right, resulting in an imbalanced mechanism. Concurrently, the insufficient length of the connecting rod engenders static forces within the design, thereby contributing to damages and suboptimal performance.

@workforwork-y2x Жыл бұрын

👌

@mecademie Жыл бұрын

What do you like about it?

@RicoJovanni Жыл бұрын

Hello! can you tell us in more detail how this is done? 😮

@mecademie Жыл бұрын

A program I developed (using C#) creates all the required commands to generate this model and gives us a text file. Then, that file is fed as input to LS-PrePost. Finally, LS-PrePost saves the model as a k file which is now ready to be input to LS-DYNA for analysis. Here is an article explaining all the details: www.inderscienceonline.com/doi/abs/10.1504/IJVSMT.2016.075240 You can also find all my publications as chapter of my PhD dissertation: spectrum.library.concordia.ca/id/eprint/982468/7/Shokouhfar_PhD_S2017.pdf

@RicoJovanni Жыл бұрын

@@mecademie thx!

@camilarivas-e4v Жыл бұрын

thank you so much! this helped me a lot :)

@kalisharankumaryadav8953 Жыл бұрын

very nice sir

@emilyganguly8150 Жыл бұрын

Our elbow can only rotate 180 degrees instead of 360, so is it considered only half a degree of freedom along the rotation axis? Is our elbow a real revolute joint?

@mecademie Жыл бұрын

For being a revolute joint, it does not matter the range of rotation. Elbow is in fact a 3D mechanism with spherical (ball and socket) joints.

@7thdim Жыл бұрын

very helpful video, I really needed this! thank you

@QwertyCanada Жыл бұрын

Good graphics

@Aplus_in_chemistry Жыл бұрын

can u please provide me with the program u use here to make annotations with pen ?

@mecademie Жыл бұрын

I use SmoothDraw. www.smoothdraw.com/

@dylanparker130 Жыл бұрын

Thank you!

@alijonniyozmetov3060 Жыл бұрын

What kind of programm did you animate?

@mecademie Жыл бұрын

I developed these animations in JavaScript.

@우왕감자 Жыл бұрын

Can you give me an example of the real life in which this device is used?

@우왕감자 Жыл бұрын

Can you give me an example of the real life in which this device is used?

@temmorijken5762 Жыл бұрын

a pumpjack for oil

@borisz.1863 Жыл бұрын

Hello Thank you very much for the videos! Very-very usefull Can you please tell what software and equipment do you use for sketch ? Thanks again !

@mecademie Жыл бұрын

Hi, I have used a free whiteboard called "SmoothDraw". The version I used: 4.1.4 Beta. SmoothDraw is an easy natural painting and digital free-hand drawing software that can produce high quality pictures. It supports many kinds of brushes (pen, pencil, dry media, airbrush, bristle brush, image hose, etc.), retouch tools, layers, etc. After you asked, to answer precisely, I checked their website: www.smoothdraw.com/ and realized that this URL does not exist anymore. However, as I searched on Google, there is a new company behind it now, which is "Softonic". Check this out and I guess you can download it from: smoothdraw.en.softonic.com/ Let me know it it still works. I used SmoothDraw and enjoued a lot. It is easy to use and quick to learn. I hope this reply helps.

@mecademie Жыл бұрын

For the equipment, I have used a pen tablet. Model: XP-PEN Deco Pro Graphic Drawing Tablet 11x6 Inch.

@tdrawsa Жыл бұрын

Excellent demonstration. Thank you.

@captainoates7236 Жыл бұрын

I don't believe it could do 360°. One of the bars would collide with a centre pivot.

@mecademie Жыл бұрын

You can assume the supports are in different parallel planes. I searched and found a video to illustrate this. Visit: kzbin.info/www/bejne/rXq2Yopsf7aEi6c&ab_channel=RandomEntertainment

@captainoates7236 Жыл бұрын

@@mecademie Ok, that works but the centre pivots would have to be floating.

@mecademie Жыл бұрын

@@captainoates7236 See this: kzbin.info/www/bejne/nZvMlKCGps-thMU&ab_channel=SoumyabrataBhattacharjee The link between centers has been installed on the ground.

@captainoates7236 Жыл бұрын

@@mecademie sorry it doesn't work. In reality you can't have an anchor floating in space

@FainTMako Жыл бұрын

100% this is a bad design. Yikes dude.

@juliansongzidezhazhamao Жыл бұрын

Is the velocity constant?

@mecademie Жыл бұрын

The velocity of towing yes. The rotation velocity of tire is the result of FE simulating tire rolling over soil.

@mecademie 11 ай бұрын

It grows ramp-wise to a level and remains constant.

@hossamrabee854 Жыл бұрын

Excellent

@AmirSayadiChannel Жыл бұрын

Awesome

@mecademie Жыл бұрын

Master different methods of direct/indirect Motion Transmission and learn how to find the Angular Velocity Ratio between any two links in a mechanical system by this short course. Visit: www.udemy.com/course/methods-of-motion-transmission-and-angular-velocity-ratio/?referralCode=8AF04739489B9F6AB083

@mecademie Жыл бұрын

Master common types of Kinematic Joints and be able to determine the Degrees of Freedom for any mechanical system following this amazing online course. Visit: www.udemy.com/course/theory-of-machines-determine-degrees-of-freedom-in-a-system/?referralCode=374C4BFC7AD80F88D1D4

@mecademie Жыл бұрын

Master different methods of direct/indirect Motion Transmission and learn how to find the Angular Velocity Ratio between any two links in a mechanical system by this short course. Visit: www.udemy.com/course/methods-of-motion-transmission-and-angular-velocity-ratio/?referralCode=8AF04739489B9F6AB083

@mecademie Жыл бұрын

Master common types of Kinematic Joints and be able to determine the Degrees of Freedom for any mechanical system following this amazing online course. Visit: www.udemy.com/course/theory-of-machines-determine-degrees-of-freedom-in-a-system/?referralCode=374C4BFC7AD80F88D1D4

@mecademie Жыл бұрын

Master different methods of direct/indirect Motion Transmission and learn how to find the Angular Velocity Ratio between any two links in a mechanical system by this short course. Visit: www.udemy.com/course/methods-of-motion-transmission-and-angular-velocity-ratio/?referralCode=8AF04739489B9F6AB083

@mecademie Жыл бұрын

Master common types of Kinematic Joints and be able to determine the Degrees of Freedom for any mechanical system following this amazing online course. Visit: www.udemy.com/course/theory-of-machines-determine-degrees-of-freedom-in-a-system/?referralCode=374C4BFC7AD80F88D1D4

@mecademie Жыл бұрын

Master different methods of direct/indirect Motion Transmission and learn how to find the Angular Velocity Ratio between any two links in a mechanical system by this short course. Visit: www.udemy.com/course/methods-of-motion-transmission-and-angular-velocity-ratio/?referralCode=8AF04739489B9F6AB083

@mecademie Жыл бұрын

Master common types of Kinematic Joints and be able to determine the Degrees of Freedom for any mechanical system following this amazing online course. Visit: www.udemy.com/course/theory-of-machines-determine-degrees-of-freedom-in-a-system/?referralCode=374C4BFC7AD80F88D1D4

Ең жақсы KZbin

Пікірлер