Code::Blocks is a free C/C++ Integrated Development Environment (IDE). It may be downloaded from: http://www.codeblocks.org/ A number of compilers may be used with Code::Blocks. MinGW is a good choice for the compiler. The Code::Blocks website has a bundled installion file that includes MinGW. Note that… Read more
On the fateful morning of 9/11, I watched the TV news coverage of the World Trade Center attack. My mind could scarcely comprehend the unfolding tragedy as I watched each tower collapse. I later wrote an article The World Trade Center Disaster: A Shock Vibration… Read more
Description My Walk Thru Heaven is an inspiring true story of a near death experience. It is a story of a single mother’s valiant fight against cancer. Losing the battle she finds herself taking an incredible journey through the portals of death and beyond. She… Read more
The B-52 had about three-fourths of its vertical stabilizer bitten off by 95-mph gusts at 14,300 feet over southern Colorado in 1964. The crew later made a safe landing. * * * I have posted the September 2011 Newsletter at: http://www.vibrationdata.com/Newsletters/September2011_NL.pdf The topics include: Wake… Read more
Here is an excerpt from a National Transportation Safety Board Aircraft Accident Report… Research has shown that fundamental frequency (pitch) can convey information about a speaker’s psychological stress. With regard to fundamental frequency, the Safety Board used the following guidelines from two previous accident investigations… Read more
I have written some tutorials on avionics component isolation which may be downloaded at: avionics_iso.pdf six_dof_isolated.pdf * * * The Matlab GUI scripts are given in the GUI package at: Vibrationdata Matlab GUI Package The function is accessed via: Miscellaneous > Structural Dynamics > Spring-Mass… Read more
The plate is aluminum, 0.063 inch thick. The fixed edge length is 6 inch. The free edge length is 4 inch. The vibration mode was calculated via the Rayleigh method using an assumed displacement function, as carried out via Matlab script: fixed_free_fixed_free_plate.m The method is… Read more
I have posted a Vibrationdata Newsletter with an aviation theme at: http://www.vibrationdata.com/Newsletters/August2011_NL.pdf The articles include discussions of . . . 1. The XF-84H turboprop aircraft which had supersonic blade tip velocity 2. Aircraft landing shock 3. Turbofan engine buzz-saw noise Military Aircraft Carrier & Normal… Read more
IEST-RD-DTE012: Handbook for Dynamic Data Acquisition and Analysis The purpose of this Handbook, IEST-RD-DTE012.2, is to provide guidelines for acquiring and analyzing structural (or mechanical) shock and vibration, and acoustic and aerodynamic noise data from flight and ground tests for all categories of aerospace vehicles.… Read more
Dr. Curtis Larsen asked me to distribute this newly-published “Lessons Learned” document. It is oriented to systems engineering. NASA/CR—2011–216468, Lessons Learned in Engineering J.C. Blair, R.S. Ryan, and L.A. Schutzenhofer Al Signal Research, Inc., Huntsville, Alabama Download Link Topics of interest include: turbopump vibration &… Read more