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Articles: Vibration Analysis

The Challenges of Safety

Permanently Mounted Sensors Key to Gathering Quality Vibration Data 

by Tim Hunt and Tom LaRocque

Over the past several years, safety has experienced an increase in focus at manufacturing facilities.  And sometimes, that increased emphasis on safety provides challenges to vibration measurement, many of which require creative solutions in order to obtain the valuable vibration data that ensures the maximum life out of our (now much safer) equipment and machines.

The Road to PdM Excellence - Achieving Vibration Analysis Best Practices at Orange County Sanitation

The Orange County Sanitation District (OCSD) is a public agency that serves 2.5 million people in central and northern Orange County. OCSD treats more than 230 million gallons of wastewater every day (enough water to fill Anaheim stadium nearly three times each day), making it the third largest wastewater treatment agency west of the Mississippi River.

Transitions - When to Move from Walk-Around to Online Systems for PdM

by Dennis Shreve

Rotating equipment in production facilities offers optimal performance and reliability when properly installed, maintained, and operated.  Condition monitoring devices and systems are utilized to keep tabs on the operational performance of key production equipment.  All types of tools and technologies exist today in the predictive maintenance field to allow monitoring and assessment of such equipment.

Using Vibration Monitoring Equipment For OTHER Functions

by: Steve Goldman, P.E. - Author of Vibration Spectrum Analysis

Introduction:

In recent years, it has become rather common for large and medium sized facilities to begin predictive maintenance programs employing narrow band FFT- based vibration analysis equipment. The cost savings involved in this sort of quality predictive maintenance program easily justifies the ten to twenty thousand dollar cost of the data gathering box and related software.

Vibration Analysis of Wind Turbines

by Jason Tranter

Wind turbines are dotted across the countryside, seaside, and even offshore. Many believe they are the answer to global warming and stopping the reduction of fossil fuel reserves. Whether you enjoy seeing them on the horizon, majestically spinning in the breeze, or believe they disturb the previously unspoiled landscape, for all of us in the reliability and condition monitoring fields, they pose a new challenge - we have to keep them turning!

 

Vibration Analysis Reporting - Bearing Failure Stages & Responses

This technical note has been written to act as a guide to vibration analysts and maintenance personnel. It outlines the expectations that maintenance personnel should have w.r.t. reporting of bearing defects identified in vibration spectrums.

Vibration Analysts Save the Planet

by Jason Tranter

If you look under the shirt of the average vibration analyst, you might just see a blue, skin-tight bodysuit with a large red "S." You already know that vibration analysts are heroic in their responsibility of avoiding catastrophic machine failures and the downtime and safety risks that follow. But did you know that vibration analysts are saving the planet, too?

Vibration Trouble-shooting Field Guide

By Sam Pickens of PDM Engineering

What is vibration? There are three basic types; Linear, Bending and Torsion. Three basic types of transducers for machinery vibration study; acceleration, velocity and displacement. Three basic parameters; acceleration, velocity and displacement. So we need to be able to observe these phenomena in an easily understood way via data acquisition instrumentation. We can then apply 200-year-old math to decipher the meaning of the data represented on the instrument.

Visual Acoustic Analysis Ends Super Calendar Mystery

by Daniel T. Ambre, P.E.

This article shows an interesting example of how Acoustic Analysis methods were used to solve a stubborn vibration problem where Experimental Modal Analysis and Operating Deflection Shape Analysis fell short.

 

What is Shock Pulse Method?

Shock Pulse Method is a signal processing technique used to measure metal impact and rolling noise such as those found in rolling element bearings and gears. Much more refined than other high frequency measurements, Shock Pulse is widely used throughout the world as a basis for predictive maintenance. Rolling element bearings are the most common measurement for Shock Pulse but the measurement technique has a number of other applications such as gear condition, compressor condition and other applications where metal-to-metal contact is a source of wear.

Why is Monitoring Vibration Important?

By Commtest Instruments

Monitoring machine vibration and using the information you obtain saves money!

How is this possible?

We will answer this question in the following pages.

Why you need Continuous Calibration

by Brian Graney,

Single point calibration is not a calibration at all. It is a sensitivity check at 100 Hz. An accelerometer is a dynamic sensor therefore it is required to have its sensitivity checked over its entire frequency range. There are two basic methods for doing this.

 

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