Acoustic and Flow Induced Vibrations (FIV and AIV) with an Introduction to Random Vibrations

The full course is divided into three parts that cover the following details:

Part-1: Vibration Basics

• Single degree of freedom –Undamped system

• Single degree of freedom damped system

• Critically damped system

• Overdamped systems

• Underdamped systems

• Forced vibration

• Solution to equation for forced vibration

• Responses in forced vibration- with and w/o damping

Part-2: Random Vibration Basics

• A demonstration of random process

• Probability distribution function

• Concept of expectation values, variance, std. deviation and autocorrelation function

• Fourier transformation

• Concepts and equations relevant to frequency domain analysis

• Broadband and white noise

• Concept of impulse response function

• Concept of input-output in frequency domain analysis

Part-3: FIV and AIV

• AIV-Theory

• FIV-Theory

• The concepts and examples of fluid dynamic, monopole, dipole and quadrupole.

• Beam and shell modes of vibration

• Carucci and Mueller’s work on AIV

• Some approaches used by many oil and gas companies

• Eisinger and CSTI D/T limits

• Different methods available for analysis of AIV

• Eisinger approach

• NORSOK criteria

• AIV- Energy Institute guideline

• Mathematical analysis of AIV

• Development of screening methodology – Energy institute guideline

• Joint acceptance function

• Extension to higher D/T Ratios

• AIV-State of the art

• Experiments conducted for development of EI guideline.

• Steps to mitigate damage due to AIV

• AIV –Mitigation-some examples

• Summary of changes in yet to be published 3rd edition of EI guideline

• Acoustic energy split between header and branch

• FIV- Effects and immediate actions

• FIV-Data collection

• FIV- EI guideline

• Assessment of SBC

• Appendix C of EI guideline

• SBC-LOF

• Mainline and SBC LOF based actions

• Quantification of forces due to FIV

• Vibration acceptance criteria- displacement

• Piping Vibration-Energy institute guideline-velocity based

• Dynamic strain measurement-Energy Institute Guideline

• Viscous dampers