I have begun work on a Matlab GUI finite element package for structural dynamics. This is a long-term work-in-progress! Here is the current package: vibrationdata_fea_preprocessor.zip vibrationdata_fea_preprocessor.m is the main script. The remaining scripts are supporting functions. * * * Here are sample input files in… Read more
Here are the materials. PowerPoint Files: webinar_6_Leakage_Hanning.ppt webinar_7_FFT.ppt * * * Audio/Visual Files – Recommend viewing in Firefox with Sliverlight plugin NESC Academy FFT NESC Academy Leakage Hanning Window * * * Reference: Hanning Window Compenstation Factor * * * Matlab script: Vibrationdata Signal Analysis Package * *… Read more
Here are the materials for Fourier transforms: PowerPoint File: webinar_Fourier_transform.ppt Audio/Visual File: NESC Academy Fourier transforms – Recommend viewing in Firefox with Sliverlight plugin Matlab script: Vibrationdata Signal Analysis Package * * * Python PowerPoint File: webinar_Fourier_transform_python.ppt * * * Data Tuning Fork – time(sec) & unscaled… Read more
Formulas for calculating the speed of sound in gases, liquids, and solids is given in: speed.pdf A Matlab function for these calculations is included in the package given at: Vibrationdata Matlab Signal Analysis Package The speed of sound calculator can be accessed within this package… Read more
Here are the materials for random vibration: PowerPoint File: webinar_random_vibration.ppt Audio/Visual File: NESC Academy Random Vibration – Recommend viewing in Firefox with Sliverlight plugin Matlab script: Vibrationdata Signal Analysis Package * * * Python version PowerPoint File: webinar_4_Random_python.ppt * * * See also: NAVMAT-P9492 Random Vibration… Read more
Here is a Newsletter with an article about the Hoover Dam turbine generators: Vibrationdata Newsletter July 2007. Here is a measured sound file from the generator room: Hoover.mp3 Here is a Matlab GUI script for calculating the vibration frequencies of a turbine generator: turbine_generator_frequencies.zip Here… Read more
Matlab scripts are available in : Vibrationdata Signal Analysis Package for the following functions:1. Balancing a rotor with single speed, balancing plane and measurement location2. Balancing a rotor with options for multiple speeds, balancing planes, and measurement locations3. Calculating the rotating unbalance force from an eccentric… Read more
Here are the materials for sine vibration: PowerPoint File: webinar_sine.ppt Channel beam accelerometer data: channel.txt time(sec) & accel(G) Papers: POGO Oscillation Smallwood Algorithm Matlab script Vibrationdata Signal Analysis Package * * * Here is the audio/visual file link: NESC Academy Sine Vibration – Recommend viewing in Firefox… Read more
Here is a script for reading ASCII text files into Matlab: read_data.m This script uses uigetfile to open a dialog box for selecting the input file. – Tom Irvine
Here is a Matlab script that converts a time history to a format which can be input to Femap or some other preprocesser for Nastran analysis. time_history_nastran.m with supporting function: datafix.m It can be used for force, pressure, acceleration or other amplitude types. The script… Read more