Update August, 2, 2025 Last Friday was a downer. But Tapir has these tickers doing well: AZO, URI, MSFT Update ticker list which can be used with the Tapir program: stocks_etf_tickers.txt ________________ Update July 27, 2025 Tapir’s recommendations: SPY, IVV, PH, VOO, GS Matlab code… Read more
Uncategorized
Shock, Vibration, Fatigue & Acoustics Classes Beginning June 2025
Each class and each part is one-hour long. The format is similar to a college semester system. Students will receive IACET CEUs. Class Registration Link Basic Shock & Vibration IntroductionVibration TestingExcitation FunctionsSine VibrationSine Sweep VibrationRandom Vibration StatisticsSDOF Response to RandomNon-Gaussian RandomFourier TransformFFTWaterfall FFTSample RateLeakage &… Read more
Stress & Fatigue Cumulative Damage Index Response Spectra
The image is the Stress Response Spectrum of 50 G, 11 msec Terminal Sawtooth Pulse Base Input Presentation: stress_FDS_revC Consider a component which must withstand a dynamic environment and where the stress response is the needed output metric for engineering evaluation. This presentation gives a… Read more
Shock, Vibration & Acoustics Classes Beginning January 2025
Each class and each part is one-hour long. The format is similar to a college semester system. Students will receive IACET CEUs. Class Registration Link Basic Shock & Vibration IntroductionVibration TestingExcitation FunctionsSine VibrationSine Sweep VibrationRandom Vibration StatisticsSDOF Response to RandomNon-Gaussian RandomFourier TransformFFTWaterfall FFTSample RateLeakage &… Read more
Expansion upon ANSYS Random Vibration Fatigue Paper
ANSYS Fatigue Paper Expanding upon ANSYS Fatigue Slides Vibration fatigue calculations are “ballpark” calculations given uncertainties in S-N curves, stress concentration factors, non-linearity, temperature, surface finish, heat treatment, load sequence, multi-axis loading, mean stress, size, geometry and other variables. Perhaps the best that can be… Read more
Shock, Vibration & Acoustics Classes Beginning Fall 2024
This classes will be held via Zoom and taught by Tom Irvine. Each class and each part is one-hour long. The format is similar to a college semester system. Students will receive IACET CEUs. Class Registration Link Basic Shock & Vibration IntroductionVibration TestingExcitation FunctionsSine VibrationSine… Read more
Acoustics Seminar via Zoom, Saturday, March 23
I am currently developing an acoustics course that will include statistical energy analysis, and am offering a free preview on Saturday, March 23 from 8:00 AM to 12 Noon, US Central Time. The preview topics will include: Sound Power, Pressure & IntensitySound Pressure Level (SPL)… Read more
Shock & Vibration Classes Beginning June 2024
This classes will be held via Zoom and taught by Tom Irvine. Each class and each part is one-hour long. The format is similar to a college semester system. There are four, revolving class sets. Class Registration Link Basic Shock & Vibration IntroductionVibration TestingExcitation FunctionsSine… Read more
Virtual Engineering Conference for Shock, Vibration, Acoustics, Fatigue, Feb 24, 2024
Update: Here is the conference recording link. Passcode: 09GI+5&6 We will meet via Zoom on February 24, 2024 from 7:00 AM to 4:30 PM US Central Time. Attendees may “come and go.” The link is given below. The current presentation schedule is: 9:00 AMDr. Dilip K MandalAPML:… Read more
Virtual Engineering Conference for Shock, Vibration, Acoustics, Fatigue, Jan 20, 2024
We will meet via Zoom on January 20, 2024 from 7:00 AM to 8:30 PM US Central Time. Attendees may “come and go.” The link is given below. This will be a good opportunity for university students to present their research. Professional engineers can also pass on… Read more