Tom Irvine ModalMass_revK.pdf Effective modal mass and modal participation factors provide a quantitative basis for identifying dynamically significant vibration modes and for guiding modal truncation in structural dynamic analyses. This paper presents a unified formulation for both base-excited systems and grounded systems subjected to externally applied forces.… Read more
Image reference: https://onlinelibrary.wiley.com/doi/full/10.1002/adem.202300394 What Is Anodizing? Anodizing is widely used to improve corrosion resistance and surface durability in aluminum and other light metals. However, under cyclic loading, anodized coatings can play a surprising, and sometimes detrimental, role in fatigue performance. Thanks for reading Tom’s Substack!… Read more
Figure 1. Space Shuttle Orbiter Ku-band Antenna Introduction Mechanical vibration is usually undesirable in a structure because it can lead to fatigue and other types of failures. Vibration does have its beneficial uses, however. For example, dither vibration was used to ensure that the Space… Read more
🐘 The Secret Language of Giants: How Elephants Communicate Through Infrasound When we think of animal communication, we might picture birdsong or whale calls. But elephants, some of the most intelligent and socially complex mammals on Earth, have evolved a secret communication channel that humans… Read more