|May 5, 2021|
|Modal Testing Webinar Series|
Modal Testing Webinar Series
From Navigating Common Test Setup Issues to Understanding MIMO vs. SISO
The Modal Shop invites you to join us for a new Modal Testing webinar series. We’re bringing in modal testing expert, Dr. Pete Avitabile, to share decades of testing experience in an easy-to-access format. Each session will last approximately 90 minutes with time for questions and answers. Webinars are hosted from May 5 through June 9, at 1:00 PM EDT.
At the end of the series, we'll share a certificate for continuing education credits accumulated. Learn more below and register today!
- May 5, 2021 Successful Modal Testing: Navigating Common Issues
Test set up issues can have a significant effect on measured FRFs. Effects of the actual boundary condition for the test article can make a difference in the measured FRFs with issues related to frequency and damping for instance.
- May 13, 2021 Successful Modal Testing: Understanding Mass Loading
Accelerometer mass loading can have an effect on measured FRFs, especially when there is a stationary hammer hit and the accelerometers are roving on the structure to acquire all the measurements. The mass loading effect is shown with some variations to understand the effect – which is especially significant for modal parameter estimation. Discussion on MRIT and how it is useful is also included.
- May 19, 2021 Impact Testing: From Hammer Tips to Damping Windows
Impact testing is by far the most widely used and most popular of the techniques to acquire FRFs. There are many things to consider such as hammer tip, damping window, etc. Some of these are discussed and concerns are explained.
- May 26, 2021 Impact Testing: From Structure Response to Double Impacts
Some more finer points on impact testing are discussed. These include using too hard of a hammer tip and filter ring, does the hammer input need to excite the entire bandwidth of the FFT, effects of structure response from one average to the next, and of course the problematic double impact.
- June 2, 2021 Shaker Testing: Understanding the Basics
Shaker testing can be more involved. Why are there so many different excitation techniques and which ones are used when? And there is care that is needed when attaching the shaker to the structure. A general discussion on some of these basic concerns is the subject here.
- June 9, 2021 Shaker Testing: Choosing MIMO vs SISO
Shaker testing is deployed for many reasons. Multiple input multiple output raises the level of shaker testing. So why do we do it? What are some of the concerns? Why can't we just use one shaker and move it around? Seems like a lot of complication but there is a reason why we do it. This is discussed to get a better handle on what’s important.