Guidance on optimal support locations to minimize thermal stresses and avoid resonance. Mechanical natural frequencies (MNF) calculations to assess the risk of vibration modes to be resonant. Force predictions to identify the amplitude and frequency content of the flow-induced forces. These forces are then applied on a structural model of the piping system to predict vibration and dynamic stress levels, which can then be compared with acceptance criteria to assess the severity of the flow conditions and predict the fatigue life of the system.ĭuring the project design stage, we can support the project team through carrying out a range of high-end engineering services: Hydrodynamic- or terrain-induced slugging is possibleĪ multiphase flow study starts with a detailed CFD analysis to predict the time-varying velocities, forces and pressure levels in the piping system. Thermophysical properties of transported fluids are changed. Flow rates are increased or changes to the gas to oil ratio are considered. These forces can be relatively broadband in nature and can therefore excite a range of structural modes.Ī stress or fatigue study should be considered when: The risks from flow- or process-induced vibration excitation of pipework are widely acknowledged in onshore process plants, offshore topsides and subsea facilities. Multiphase flow is particularly of concern because forces can vary considerably with flow regimes, and so relatively small changes in the gas to oil ratio can result in significant changes in dynamic force levels. Webinar: Shake, rattle and grow – part II. Webinar: Shake, rattle and grow – part I. Webinar: (Digital) reliability = profitability. Troubleshooting, Root Cause Analysis (RCA). PostPro – field data processing and analysis. Motion Amplification Vibration Analysis. Underwater Noise Monitoring and Assessment. Noise risks in the natural gas industry. Noise Management and Control – Service Overview. Machinery Condition and Performance Monitoring. Condition Monitoring and Remote Vibration Analysis. Surge Control Design for Centrifugal Compressor Systems. Shell Transverse Acoustical (STA) Analysis. 
Pulsation & Mechanical Analysis: Screw Compressor.Pulsation & Mechanical Analysis: Reciprocating Pump.Pulsation & Mechanical Analysis: Reciprocating Compressor.Fuel Gas Compressor Piping Transient Analysis.Structural Vibration and Dynamic Design Analysis.Small-Bore Connections (SBC) Assessment.Piping Vibration and Integrity Assessment.Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD).Acoustic-Induced Vibration (AIV) Analysis.Acoustic Fatigue Assessment for Blowdown Systems.Static Equipment & Structures (Piping Vibration & Fatigue).Choice of finite element or analytic catenary representation.Compressibility specified by bulk modulus.Water entry / exit slam loads (per DNV H103, RP-C205).Added mass as a function of submergence or height above seabed.Line drag and lift coeffs can vary with Re or seabed proximity.Partially submerged lines (eg, floating hoses) handled robustly.Wake Interference (Huse, Blevins,user specified).Hydrodynamic, aerodynamic and user-defined applied loads.Line Contact for pipe-in-pipe, piggybacks, J-tube pulls, bend stiffeners, sliding connections, etc., allowing smooth modelling of large relative axial motion including friction.Line Clashing for external clash modelling between lines.Non-isotropic Coulomb friction with seabed & elastic solids.Clumped line attachments, drag chains or flex joints.Line CofG may be displaced from geometric centre.Rayleigh damping with or without geometric stiffness.3D hysteresis model available for bending.Axial, bending and torsional stiffness can be nonlinear.Bending stiffness, drag and added mass can be non-isotropic.Multiple coatings and linings can be defined.
Orcaflex slug flow model free#
Slug flow and free flooding options for line contents.Centrifugal and Coriolis internal flow effects included.spool pieces) now with visualisation tool Bend Stiffener / Tapered Stress Joint model generation.Fully coupled bending, torsion and axial stiffness.
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