Machine Tool Genome Project
  • Home
  • RCSA
    • MTGP Registry
    • Request for Artifact Test
    • Request for Best Speed
    • Chatter Analysis
  • Training

Vibration on a Bridge

2/26/2019

0 Comments

 
​Had this very interesting discussion with Mark Parish yesterday when talking about variable pitch milling cutters. He told me this story of British soldiers breaking stride when crossing a bridge to prevent resonant vibrations that legend has it caused a massive bridge failure in 1831. I found this great article on the subject that explains how the rhythmic marching matched the vibrational frequency of the bridge. However this article leaves out a very important point. The vibration described was self excited and regenerative. It started when the first row of soldiers mounted the bridge. Each succeeding row increased the force applied to the bridge and amplified the vibration until enough rows of soldiers generated enough force that it reached its failure point. In milling, regenerative chatter (AKA regeneration of waviness) leads to tool failure. 
Article
0 Comments



Leave a Reply.

    About Us

    Sharing information about high performance milling technologies, the result of 30 years of research.

    Archives

    August 2019
    May 2019
    April 2019
    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    August 2018

    Categories

    All
    Chatter
    Dynamics
    Endmills
    Milling
    Shophacks
    Testing
    Toolholders

    RSS Feed

    View my profile on LinkedIn

Machine Tool Genome Project
Copyright © 2018-2020

DISCLAIMER
  • Home
  • RCSA
    • MTGP Registry
    • Request for Artifact Test
    • Request for Best Speed
    • Chatter Analysis
  • Training