The plate is aluminum, 0.063 inch thick. The fixed edge lengths are 6 and 4 inches. The vibration mode was calculated via the Rayleigh method using an assumed displacement function, as carried out via Matlab script: fixed_fixed_fixed_fixed_plate.zip The method is given in: fixed_fixed_fixed_fixed_plate.pdf See also:… Read more
Slides: webinar_45_two_dof_trans_rot.pptx Audio/Visual File: NESC Academy Two-degree-of-freedom System with Rotation and Translation – Recommend viewing in Firefox with Sliverlight Plugin * * * Matlab script: Vibrationdata Signal Analysis Package * * * Reference Papers Sample Automobile Vibration Problem: auto.pdf Spring-Mass System Subjected to Enforced Motion:… Read more
Some U.S. states allow semi-trucks with three trailers. The truck configuration can total up to 105 feet by adding a rear trailer. Terry Sumter, a UPS driver for 30 years, has experienced the back trailer moving into the oncoming lane. “The most significant condition is… Read more
Curiosity is a car-sized robotic rover exploring Gale Crater on Mars as part of NASA’s Mars Science Laboratory mission (MSL). Curiosity was launched from Cape Canaveral on November 26, 2011 aboard the MSL spacecraft and landed on Aeolis Palus in Gale Crater on Mars on… Read more
I will present two tutorials sessions at the Shock & Vibration Symposium. Here are the slides: Shock Response Spectra & Time History Synthesis SAVE_conference_2014_Irvine_shock.pptx Rainflow Cycle Counting for Random Vibration Fatigue Analysis SAVE_conference_2014_Irvine_fatigue_revA.pptx * * * Here is the Matlab GUI multi-function signal analysis package:… Read more
I have added a function for generating random time histories with user-specified skewness & kurtosis to the Vibrationdata Matlab Signal Package posted at: Vibrationdata Matlab Signal Analysis Package The function includes an option for band-limiting the signal via lowpass filtering. Tom Irvine
PowerPoint Slides: webinar_35_fatigue_sine_random.pptx Audio/Visual File: NESC Academy Using Fatigue to Compare Sine and Random Environments – Recommend viewing in Firefox with Sliverlight Plugin * * * References: Steinberg’s Vibration Analysis for Electronic Equipment Sine and Random Vibration Equivalent Damage Rainflow Fatigue Posts * * * Matlab… Read more
Matthew 15 21 Then Jesus went thence, and departed into the coasts of Tyre and Sidon. 22 And, behold, a woman of Canaan came out of the same coasts, and cried unto him, saying, Have mercy on me, O Lord, thou son of David; my… Read more
PowerPoint Slides: webinar_34_rainflow_fatigue_beam.pptx Audio/Visual File: NESC Academy Rainflow Fatigue for Continuous Beams – Recommend viewing in Firefox with Sliverlight Plugin * * * References: Steinberg’s Vibration Analysis for Electronic Equipment Rainflow Fatigue Posts * * * Matlab script: Vibrationdata Signal Analysis Package * * * See also:… Read more
Here is a Matlab script for the ground PPV: blast_ground_velox.zip References: http://www.dot.ca.gov/newtech/researchreports/reports/2001/vibrations.pdf ftp://ftp.odot.state.or.us/techserv/geo-environmental/Material%20Sources/Resources/Blasting_and_Community.pdf – Tom Irvine