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How to schedule

To schedule private education for your group, contact:

Dale Shuter, CMP
Meetings & Expositions Manager

+1 314 993 2220, ext. 3335
dshuter@easa.com

1 hour of training

$300 for EASA Chapters/Regions
$400 for member companies
$800 for non-members

How a webinar works

All EASA private webinars are live events in which the audio and video are streamed to your computer over the Internet. Prior to the program, you will receive a web link to join the meeting. 

The presentation portion of the webinar will last about 45 minutes, followed by about 15 minutes of questions and answers.

Requirements

  • Internet connection
  • Computer with audio input (microphone) and audio output (speakers) appropriate for your size group
  • TV or projector/screen

Zoom logo

The Zoom webinar service EASA uses will ask to install a small plugin. Your computer must be configured to allow this in order to have full functionality. Please check with your IT department or company's security policy prior to scheduling a private webinar.

Private Webinars

EASA's private webinars are an inexpensive way to bring an EASA engineer into your service center, place of business or group meeting without incurring travel expenses or lost production time.

Article

How to Conduct a “Bump Test” for Resonance

  • July 2024
  • Number of views: 3122
  • Article rating:

Gene Vogel
EASA Pump & Vibration Specialist 

Image
There are many common causes of high vibration on rotating machinery; too many to list here. But often, what would otherwise be an acceptable level of vibration is amplified by resonance. All machines are susceptible to resonance. Resonance occurs when the natural frequency of some machine component coincides with an exciting force. When resonance occurs it is the combination of exciting force and a natural frequency that results in high vibration; both must be present at the same frequency for resonance to occur. When resonance does cause excessive vibration, it is important to identify the natural frequency and the mode shape of the vibration. A simple bump test, conducted with the machine not running, is a good first step in identifying the natural frequency (Figure 1).

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