The following are the main topics of this course: structural vibration, combining failure analysis, analytical, and test solutions: The main goal is to offer a comprehensive, analytical, and testing method for resolving field vibration concerns, with a focus on vibration problems related to pipes. Secondary Goal: Establish a common vocabulary that facilitates a clear understanding of what each party requires in order to address vibration problems between the test engineer and the analyst.

Course Objectives:

This course provides a thorough review of a wide variety of causes of process plant piping vibration from the point of view of an engineer that must identify the cause of vibration, determine if the vibration is excessive, and correct the problem if it is. It provides a background on fundamental causes of piping vibration and how to identify the source of vibration, rules of thumb and simplified methods for evaluating vibration severity, and methods of treatment. A wide variety of causes of vibration are covered in order to enable the participant to properly evaluate the variety of piping vibration problems that can occur in piping systems.

Who Should Attend?

This course is directed towards engineers responsible for operating piping systems. However,
Designers of new piping systems will also find the broad coverage of potential vibration
Problems a time-saving briefing on the variety of vibration problems that can occur in piping systems.

Course Outlines:

Introduction

Course objectives and course overview; General vibration facts and plant vibration issues

Optimum Vibration Problem Resolution Strategy
Root cause determination approach; Integration of analysis and test

Basic Vibration Theory
Terminology: sine waves, amplitude, frequency, phase.
Single DOF Parameters: stiffness, damping, and mass, Governing EOM
Multi degree-of-freedom system characteristics: mode shape and frequency

Vibration Test Fundamentals

Test specifications: frequency range, measured parameters, sensor locations, sensor types
Instrumentation concerns: linearity, range, bandwidth, installation, uncertainty analysis
Data acquisition: digital vs. analog. Digital DAQ issues: amplitude resolution and aliasing.

Signal Processing

FFTs, windowing, filtering, digital integration, averaging, overlap, order tracking

Data Analysis Techniques

Data analysis: time history, frequency spectrum; Data statistics: peak, peak-to-peak, RMS

Vibration Causes and Data Interpretation
Imbalance: static, dynamic; Misalignment: parallel and angular; Bent or bowed shaft
Resonance and Critical speed; Damaged bearings; Gear problems; Fluid induced vibration

Case Studies
Case studies are presented that illustrate the application of the course information. In addition, students are encouraged to present current plant problems for the class to work on.

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