Title: Ejs open source java applet 1D collision force model Post by: lookang on March 15, 2012, 09:34:17 am Ejs open source java applet 1D collision force model by FuKwun Hwang
a remix here is by lookang reference: http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=193.0 thanks to FuKwun Hwang for this awesome model :) Title: Re: Ejs open source java applet 1D collision force model Post by: lookang on March 15, 2012, 09:37:51 am changes:
added m_A and m_B sliders added Force vs time graph add floor add forces vectors add force equations which is already provided by F1= getA(x1,x2,m1) and F2 = getA(x2,x1,m2) by Fu Kwun: // awesome codes public double getA (double xa,double xb,double m) { if(Math.abs(xaxb) } return 0.; } Title: Re: Ejs open source java applet 1D collision force model Post by: babyparty on March 17, 2012, 06:12:20 pm Thanks...for...sharing...
Title: Re: Ejs open source java applet 1D collision force model Post by: engrg1 on March 23, 2012, 10:34:47 pm Hi, all.
Thanks to Prof Huang and Loo Kang for the codes. I have edited the codes so that you can show a range of collision type (0: elastic to 1 perfectly inelastic) Have used the equation provided by Ojalvo and Cohen, 1977). You can find the formula @ http://www.brachengineering.com/publications/SAE%202003010491.pdf (Pg 3) Feel free to give comments. Title: Re: Ejs open source java applet 1D collision force model Post by: engrg1 on March 24, 2012, 09:41:41 am Hi, all.
There is some mistake in the formula in the earlier post. I have corrected in this version. It seems that I can't get a perfect value of final velocity based on the coefficient of restitution. I suspect this is due to the modelling equation. Thank to Prof Hwang and Loo Kang again for the codes. Title: Re: Ejs open source java applet 1D collision force model Post by: engrg1 on March 25, 2012, 10:46:30 pm Have modified my previous version with more features (from Loo Kang's initial 1d collision cart)
feel free to give comments! I am still searching for some better equation to model the impact force. Best to run the applet full screen Title: Re: Ejs open source java applet 1D collision force model Post by: engrg1 on March 26, 2012, 08:30:45 am Just realize that this equation is rather correct. The calculation of coefficient of restitution is accurate. I have the wrong idea in the previous post as the e that is displayed is to 1 d.p. The actual e is very close to the given e.
Sorry for the mistake.. Title: Re: Ejs open source java applet 1D collision force model Post by: lookang on March 26, 2012, 09:34:54 am simply awesome remix :)
i not sure why it lag Title: Re: Ejs open source java applet 1D collision force model Post by: engrg1 on March 26, 2012, 01:36:57 pm just need to set the frame rate to 100. It should work fine.
