Welcome to Vibrationdata
Vibration of Vehicles Page

Dear Guest, Writing tutorials and maintaining a website are expensive endeavors. I need your help to continue this effort. Your subscription will allow me to continue this site and to add new materials. The software and tutorials require a username and password which are given by subscription. The subscription instructions are given below. The subscription entitles the user to download all of the items on this page, as well as other Vibrationdata pages. Thank you for your support. Sincerely, Tom Irvine Email: tomirvine@aol.com

VIBRATION OF VEHICLES Helicopters Helicopter Ground Resonance: helicop.pdf Apache Helicopter Noise. This article includes Fourier transforms of acoustic data that reveal the blade passing frequency and harmonics of each rotor. (Vibrationdata Newsletter) April 2003 NASA, Low Noise Rotor Concepts: NASA_lownoise.pdf Chinook Helicopter Ground Resonance Video Side View: hgr1.avi Chinook Helicopter Ground Resonance Video Back View: hgr22.avi Automobiles Transportation Shock Due to Speed Bumps and Road Obstacles: bump.pdf Sample Automobile Vibration Problems: auto.pdf Liu and Pfeifer, Introduction to Brake Noise Vibration (slide presentation): brake.pdf Automotive Acoustic Glossary: auto_sounds.pdf Rocket Vehicles This section has moved to a new page: Rocket Vehicles Page

Software  Description  Executable   Source Calculation of the overall velocity level from an acceleration time history via an FFT. The calculation allows for a highpass frequency. helicopter_engine_FFT.exe  helicopter_engine_FFT.cpp This program calculates the vibration test levels per MIL-STD-810F,Table 514.5C-IV, Helicopter Vibration Exposure. hve.exe hve.cpp Tire vibration frequency due to rotating imbalance. tire.exe tire.cpp

Issue Feature Articles August 2008 hybrid_acceleration.mp3 UH1D_Huey.mp3 NASA_Ares1_Slides.pdf Hybrid Car Warning Sound    Huey Helicopter Sound & Vibration Ares I Launch Vehicle Vibration             August_2006 Lissajous.m Disc Brake Squeal Lissajous Patterns   August 2004 Automobile Vibration Energy Harvesting from Ambient Vibration Sources   May 2003  taps.wav The Sounding of Taps at President Kennedy's Funeral. This article discusses Sergeant Keith Clark's rendition of Taps at the funeral. Helicopter Vibration per MIL-STD-810F April 2003 apache.wav Apache Helicopter Noise. This article includes Fourier transforms of acoustic data that reveal the blade passing frequency and harmonics of each rotor.  February 2003 Space Shuttle Columbia Infrasound Snapping Shrimp Acoustics  January 2003 Aerodynamic Buffeting at Transonic Speeds Vibration in Classic TV Sitcoms  July 2002 Space Shuttle Acoustics, Overpressure, and Vibration October 2001  The Kursk Submarine Disaster: A Shock Vibration Perspective How Astronauts Use Vibration to Measure Their Weight in Space  September 2001 The X-43A Flight Failure The Tacoma Narrows Bridge  August 2001 Sunquakes David O. Smallwood, Improved Recursive Formula for Calculating Shock Response Spectra  July 2001  Pegasus Launch Vehicle Shock Vibration

Recommended Books (Amazon) Thomas D. Gillespie, Fundamentals of Vehicle Dynamics

	Web www.vibrationdata.com