What is AIV and FIV in piping?
High-frequency piping vibrations are called acoustic-induced vibration (AIV), because the flow is mostly gas and the vibrations typically produce sound waves within the range of human hearing. Low-frequency vibrations are called flow-induced vibration (FIV), as the flow typically contains liquid and less sound waves.
How do you reduce AIV?
Mitigation of AIV
- Using a higher pipe schedule or lowering the D/t ratio.
- Decreasing flow velocity by increasing pipe diameter.
- Using smoother pipe fittings which ensures a smooth transition from branch to the main header.
- Using Clamp-on supports and stiffening rings.
What is the meaning of flow induced vibration?
The dynamic response of structures immersed in or conveying fluid flow. Fluid flow is a source of energy that can induce structural and mechanical oscillations.
How do you prevent flow induced vibration?
Mitigation of Flow-Induced Vibration Reduce fluid velocity by increasing pipe size or by changing process conditions. Increase system rigidity by increasing pipe wall thickness. Reduce no turbulent sources like elbows, reducers, etc. Tighten the clearances in-between pipe and supports.
What is AIV engineering?
AIV (Assembly, Integration & Verification) Engineer in the Test Support Section, Test Centre Division, Mechanical Department, Directorate of Technology, Engineering and Quality.
What is the meaning of vortex induced vibration?
In fluid dynamics, vortex-induced vibrations (VIV) are motions induced on bodies interacting with an external fluid flow, produced by, or the motion producing, periodic irregularities on this flow. A classic example is the VIV of an underwater cylinder.
What is an AIT Engineer?
As System AIT engineer at ISIS you will be responsible for the system level integration and test activities of satellite projects. You will be assigned to perform the definition, organization, coordination, and execution of associated functional and environmental test campaigns.
What is AIV full form?
AIV – Artificially Intelligent Virus.
What is acoustic-induced vibration (AIV)?
Acoustic-Induced Vibration or AIV is a severe high-frequency vibration that the piping systems carrying vapor or gases may experience near the high pressure reducing devices.
What is an acoustic-induced vibration study?
The Acoustic-Induced Vibration Study (AIV design study) calculates the PWL and determines if the piping system is sufficiently strong to resist AIV fatigue. If necessary, changes are made to either the PWL or the piping system. For a new project, the Engineering Company (EC) or Owner asks Wood to: Evaluate the piping system;
Can inertance assess acoustic induced vibration (acoustic fatigue)?
INERTANCE has a capability regarding noise and vibration engineering, and our experts are familiar with assessment of Acoustic induced vibration (Acoustic fatigue) study. For further information, contact us at ([email protected]).
What is sound analysis for high frequency acoustic excitation?
This assessment is one of sound analysis for high frequency acoustic excitation in piping system. INERTANCE has a capability to perform below kinds of acoustic induced vibration analysis. Pressure let-down device (Control valve, pressure relief valve, pressure safety valve, orifice, etc)