Category Archives: Newton

Yet more pendulums

Posted on 24/06/2011 by dougaj4

Following Dynamically Defined Dancing Pendulums, another three versions of the dancing pendulum theme.  First a POV-RAY version by PM 2Ring, complete with reflections and shadows: POV-Ray Pendulums (click to open in a new window) and an interactive Javascript version: Javascript pendulums by PM2Ring (click … Continue reading →

Posted in Animation, Excel, Newton, Ray Tracing | Tagged , , , , | 1 Comment

Dynamic Maps

Posted on 15/06/2011 by dougaj4

Some sites providing information about the world in the form of regularly updated maps: NASA Earth Observatory Includes regularly updated satellite images and maps of satellite obeservations: USGS Earthquake Maps: Planefinder: Locate planes equipped with satellite identification equipment, including flight … Continue reading →

Posted in Newton | Tagged , , , , | 1 Comment

Dynamically Defined Dancing Pendulums

Posted on 30/05/2011 by dougaj4

Following the previous post, I have re-created the animation using a non-linear dynamic analysis inside Strand7, rather than by feeding in the positions of each ball at each time step.  The input using this approach is much simpler; just set … Continue reading →

Posted in Finite Element Analysis, Newton | Tagged , , | 2 Comments

Dancing Pendulums

Posted on 25/05/2011 by dougaj4

This animation was produced in response to a video of real pendulums performing similar tricks: Not having an animation program I thought I’d use the finite element program Strand7.  Modelling the pendulums was easy, just 15 beam elements with a … Continue reading →

Posted in Animation, Excel, Finite Element Analysis, Newton | Tagged , , , | 5 Comments

Bellows Falls Bridge

Posted on 12/05/2011 by dougaj4

Sparked by this excellent high resolution photo from the Shorpy collection, posted at Eng-Tips, and a comment that it was a three-pinned arch (coming from Wikipedia), I thought I would investigate further. Zooming in on the crown shows that there … Continue reading →

Posted in Arch structures, Historic Bridges, Newton | Tagged , , , | Leave a comment