Structural Dynamics Integrity & Vibro-Acoustics Simulation for Marine & Shipbuilding Industry: CFD, FEA, SEA & BEM
FEA & CFD Based Simulation Design Analysis Virtual prototyping MultiObjective Optimization
Structural-borne noise and vibration need to be minimized for passenger comfort and reduced environmental impact. Our full suite of vibro-acoustics simulation, and optimization tools ensures that we can minimize the structural dynamic impact of your vessel and its components early in the design phase. From large cruise ships to yachts, from frigates to submarines, many design challenges shall be addressed in the design phases of marine applications. If on the one hand the exterior noise, due to propellers, hull radiation or muffler, has to be limited for discretion or environmental reasons; on the other hand, interior noise is of concern for crew and passengers' comfort.
Use Enteknograte FEA and CFD based structural integrity and dynamics solution services to:
- Perform a wide range of structural analysis simulations, ensuring structural integrity.
- Examine thermal and stress responses on vessel components early in the design cycle.
- Determine vibro-acoustic effects and mitigate their influence.
- Acquire physical noise and vibration data for validation and feedback on designs.
- Optimize components while maintaining performance requirements.
- Finite element modeling as per classification society guidelines
- Strength analysis, fatigue and buckling analysis of plated structures and components
- Structural reliability analysis
- Vibration investigation including measurements and theoretical analysis
- Noise investigation and analysis
- Structural analysis of specialized containers and containment systems
Vibro-Acoustics Simulation for Marine and Shipbuilding : FEA, SEA and BEM
Enteknograte provides solutions to the many challenges faced by navel engineers in meeting demanding vibro acoustic specifications for both on board noise and underwater radiation. With Enteknograte experience in Acoustic and Multi-physics solutions that enable us to perform computationally efficient resulting in accurate cost effective results across the frequency range.
Main Simulation methods in Vibro-acoustic field are:
- Finite Element FEA (Structural / Acoustics)
- Statistical Energy Analysis SEA
- Hybrid FEA/SEA
- Fast Multipole FMM
- Boundary Element Method BEM
We optimize most complicated system in simple way, the output of simulation that represent our work quality index in critical points such as:
- Water loading and underwater radiation
- Noise in sensitive areas and changes in noise level
- Insulation optimization for weight and cost savings
- Underwater radiation from the vibrating panels
- Underwater radiation from the propeller point sources
- Interior noise levels in cabins from a number of different sources
Enteknograte offers a Virtual Engineering approach with CFD and FEA tools such as MSC Cradle, Ansys Fluent, StarCCM+ for flows simulation and FEA based Codes such as ABAQUS, Ansys, Nastran and LS-Dyna, encompassing the accurate prediction of in-service loads, the performance evaluation, and the integrity assessment including the influence of manufacturing the components.
Transient Resistance, Propulsion, Sea-Keeping and Maneuvering Simulation
Using cutting edge solver technology, Enteknograte’s customers have been able to tackle some of the most demanding problems that the marine industry has to offer, allowing us to predict how designs will react in operation, before budget is committed to the construction of expensive prototypes. Enteknograte’s Engineering team provides analyses ranging from: ship keeping, slamming and sloshing; wave and wind loading on offshore and underwater structures; oil and pollutant dispersions to cavitation control and propulsion system optimization.
CFD analysis can optimize ship hull design, sail shape and propeller blades. Analysis predicts water free surface around the ship hull which helps to accomplish optimal hull shape with low hydrodynamic drag. CFD provides information to optimize sail shape and location for efficient and stable ship. CFD analysis can optimize propeller blade design for energy efficient ship and avoid cavitation on the blades. Enteknograte’s Engineering team provides analyses ranging from: ship keeping, slamming and sloshing, wave and wind loading on offshore and underwater structures, oil and pollutant dispersions and cavitation control to propulsion system optimization.
Marine Propulsion System Design: Combination of CFD & FEA for Detailed Fatigue, Strength and Vibration Analysis
Marine propulsion system designers rely on the combination of CFD and FEA software for fatigue, strength and vibration analysis. Proper propulsion system/components analyses during the design phase help avoid delays in delivery and damage problems in operation, thereby reducing expensive off-hire. Professional and reliable software and experts is essential for the design of a robust system.
Deep knowledge and experience combining with advanced CFD and FEA software enable us to handle any problem with any level of complexity in very short time. We Use CFD tools such as MSC Cradle, Ansys Fluent, Siemens Star-ccm+ and FEA Tools such as Abaqus, Nastran and LS-DYNA with combination of very experienced engineers to help our customers in:
- Investigation of course keeping and turning ability
- Motions analysis of FPSOs (Floating production storage and offloading)
- Manoeuvring at low / variable speed in shallow and confined seaways/ unsteady maneuvers: tacking, gibing
- Torsional Vibration Simulation with Coupled CFD and FEA softwares to identify the interaction between components, an essential part of the system and functionality assessment
- (unlimited) deep water-Shallow water condition
- Floating wind turbine design and simulation including dynamic effects due to elastic response of wind, waves in rotor blades, the tower, and the mooring lines.
- Monohulls / conventional ships
- Multi hulls: catamarans, SWATH, trimarans
- Asymmetric ships (monohulls as well as catamarans)
- Submarines
- FEA simulation of torsional vibration regarding ice impacting on the propeller
- Fixed models as well as free to trim and sink conditions
- Coupled Hydrodynamic CFD Simulation with structural finite element analysis to Simulate transient strcutural behavior in irregular waves
- Added resistance in waves
- Combined drift and gyration
- Ship resistance analysis
- Hydrodynamic Interaction between Bodies: shielding effects, Forward speed effects
- Dynamic trim and sinkage behaviour
- Propulsion and propeller performance optimization
- Ship wake
- Shaft fatigue and lifecycle calculations of marine shafts torsional vibration stress levels based on low cycle, high cycle and transient fatigue
- Vortex induced vibration analysis
- Whipping and slamming impacts simulation: Wave-induced hull vibration for the assessment of hull girder collapse characteristics.
- Erosion CFD Simulation including hydrodynamics effects
- Offshore equipment stability: Buoyancy and centre of gravity studies
- Added masses for subsea hardware CFD calculations
- Hull performance assessment and wave-making CFD solutions
- Sea keeping behavior in regular or irregular waves
- Calculation of drag and lift on appendages
- Sail or wing optimization
- Ship structural analysis and design with FEA software such as Ansys, Abaqus and Nastran
- Hydrodynamic plant & equipment
- Tidal Power System Hydrodynamic Design
- Optimal gearbox lubrication
CFD Optimization of Hull Form Including Hydrodynamics considerations
The hullform of a ship is decisive for its energy consumption and efficiency in that a large part of the overall resistance is determined by form effects and the aft body shape influences the propulsive losses. The shape related aspects are traditionally the domain of a ship model basin. While in the past numerous physical ship models have been created and tested in a towing tank to find the optimal solution, this role has been taken over by CFD, numerical methods which allow analyzing the performance of a ship hull before the first model is built. Enteknograte Engineering team use advanced CFD and Optimization software such as Ansys Fluent, Siemens Star-ccm+ and MSC Cradle to compute hull resistance at different stages of a design.
Wave-Making Resistance
Wave-making resistance is a form of drag that affects surface watercraft, such as boats and ships, and reflects the energy required to push the water out of the way of the hull. This energy goes into creating the wave. For small displacement hulls, such as sailboats or rowboats, wave-making resistance is the major source of the marine vessel drag. CFD analysis is used to lower ship hydrolic drag by optimizing ship body shape.
Enteknograte’s engineering team use a virtual Water Channel for free surface simulations. It can be used to analyze the flow around ship hulls and predict their resistance, seakeeping, loads on components, and the downstream wake of both surface and submerged watercraft. The adaptive refinement algorithm can also detect and refine dynamically and automatically the ship wake and the free-surface of the fluid.
Coupling Hydrodynamic CFD Simulation in Ansys Fluent, Siemens Star-ccm+ and MSC Cradle with structural finite element analysis (Abaqus, Ansys) to Simulate most complicated industrial problem
Enteknograte has vast experience in the modelling of hydrodynamics using CFD simulation in a wide range of applications. The experienced CFD staff can offer an accurate and detailed analysis of the flow and be able to identify viable areas of improvement for implementation and design. This Simulation can be used to model:
- Hydrodynamic Interaction between Bodies: shielding effects, Forward speed effects
- Shielding effects of a pier adjacent to a ship, an important aspect in the design of breakwaters and how they affect mooring systems.
- Design and analysis of mooring systems, including intermediate buoys and clump weights
- Motions analysis of FPSOs (Floating production storage and offloading)
- Calculation of shielding effects of ships and barriers
- Multiple body interactions during LNG transfer
- TLP tether analysis
- Dropped object trajectory calculations
- Concept design and analysis of wave and wind energy systems including multiphase condition including hydrodynamic effects
- Simulation of lifting operations between floating vessels
- Discharging landing craft from mother ships
- Transportation of large offshore structures using barges/ships
- Float over analyses
- Motion analysis of spar vessels
- Static and dynamic initial stability including the effects of mooring systems and other physical connections
- Coupled Hydrodynamic CFD Simulation with structural finite element analysis to Simulate Transient structural behavior in irregular waves
- Coupled cable dynamics in static and dynamic analysis to modeling of mooring system loading and response in deep waters.
- Dynamic positioning system
- Towing force provided by a tug
- Damping system with unusual characteristics
- Suction force between two ships close together, or between a ship and the sea bed
Hydrodynamics & HydroAcoustics simulation for AIV (Acoustic Induced Vibration)
The pressure reduction process induces turbulent pressure fluctuations in the flowing medium, which in turn excites the downstream pipe wall, causing stresses and potentially fatigue failure. The intensity of vibration tends to increase with mass flow rate, velocity, and pressure loss. AIV (Acoustic Induced Vibration) failures are known to occur preferentially at non-axisymmetric discontinuities in the downstream piping, such as at small-bore branches and their welded supports.
Read more... Ship Stability & Safety Analysis Including Hydrodynamics & Aerodynamics Effects
Operability limits can also be of more functional nature, e.g. holding a vessel steady against an offshore windmill foundation, or launching and recovering a dinghy safely onboard in seaway. Many issues related to dynamic stability of the vessel in waves, e.g. steerability of high speed marine vehicle in waves or the dynamic stability of a vessel against excessive heeling in extreme sea states: ship motions and accelerations Simulation, shipping of green water analysis, slamming impacts simulation, sloshing simulation, steerability in waves analysis, DP -capability simulation.
Read more... Cavitation in Propulsion Systems
CFD Analysis of Propulsion Systems and Cavitation for Marine and Shipbuilding Industry
For water pumps, marine propellers, and other equipment involving hydrofoils, cavitation can cause problems such as vibration, increased hydrodynamic drag, pressure pulsation, noise, and erosion on solid surfaces. Most of these problems are related to the transient behavior of cavitation structures. To better understand these phenomena, unsteady 3D simulations Modeling Cavitation of cavitating flow around single hydrofoils are often performed and the results are compared to experiments.
Read more... Hydrodynamic Performance of Ship Hull: CFD Based Design
A typical project for hydrodynamic hull optimization may include: Establishing a close dialog between Enteknograte and the Client;
Defining a realistic operating profile;
Discussing and combining Enteknograte ’s design ideas with the client’s design philosophy to obtain an optimal hull in both a hydrodynamic and building perspective;
Optimizing the hull forebody based on the operating profile;
Optimizing the hull aftbody to improve the propulsive efficiency, including consideration on propeller and machinery configuration;
Assessing the Energy Efficient Design Index.
Read more... Hydrodynamics CFD simulation, Coupled with FEA for FSI Analysis of Marine and offshore structures
Transient Resistance, Propulsion, Sea-Keeping and Maneuvering Simulation, Cavitation, Vibration and Fatigue
Hydrodynamics is a common application of CFD and a main core of Enteknograte expertise for ship, boat, yacht, marine and offshore structures simulation based design. Coupling Hydrodynamic CFD Simulation in Ansys Fluent, Siemens Star-ccm+ and MSC Cradle with structural finite element solver such as Abaqus and Ansys, enable us to Simulate most complicated industrial problem such as Cavitation, Vibration and Fatigue induced by hydrodynamics fluctuation, Transient Resistance, Propulsion, Sea-Keeping and Maneuvering Simulation, considering two way FSI (Fluid Structure Interaction) coupling technology.
Read more... Floating, Fixed & Gravity-Based Structures Design Including Hydrodynamics & Aerodynamics Effects
Using FEA and CFD software for innovation, flexibility and efficiency in marine and offshore structural engineering for oil & gas production structures, fixed offshore wind turbine support structures, ships and floating offshore structures, our engineers can give you the optimal basis for critical engineering decisions during the entire lifecycle of your asset, be it a topside, jacket, jack-up, mooring system, dynamic stability of floating structures, risers or offshore wind turbine support structure. We Use CFD tools such as MSC Cradle, Ansys Fluent, Siemens Star-ccm+ and FEA Tools such as Abaqus, MSC Nastran and LS-DYNA with combination of very experienced engineers to help our customers.
Read more... Hydropower, Solar Power and Biomass
As move to a more sustainable energy future, Hydro Power, Solar Power, Biomass and other renewable sources will play a key role in reducing our energy footprint and ensuring supply is sufficient for a modernizing population. Enteknograte’s simulation and optimization consultants support this growing industry. Our core competencies include turbine vortex simulation and prediction, acoustic interpretation and assessment, solar farm siting, composite blade analysis and optimization, and transmission dynamics simulation and optimization.
Read more... Structural Dynamics Integrity & Vibro-Acoustics Simulation for Marine & Shipbuilding Industry
CFD, Finite Element Method (FEM), Statistical energy analysis (SEA) & Boundary element method (BEM)
Structural-borne noise and vibration need to be minimized for passenger comfort and reduced environmental impact. Our full suite of vibro-acoustics simulation, and optimization tools ensures that we can minimize the structural dynamic impact of your vessel and its components early in the design phase. From large cruise ships to yachts, from frigates to submarines, many design challenges shall be addressed in the design phases of marine applications. If on the one hand the exterior noise, due to propellers, hull radiation or muffler, has to be limited for discretion or environmental reasons; on the other hand, interior noise is of concern for crew and passengers' comfort.
Read more... Hydroplaning (Aquaplaning) Simulation
It is important to gain insights on the interaction of a tire with a film of water in order to diagnose the onset of hydroplaning and minimize the tire’s propensity to hydroplane. A coupled Eulerian-Lagrangian methodology, using a multi-material Finite Element formulation within advanced FEA software, is used to analyze the interaction of a tire with the water film. The effect of various parameters on the onset of hydroplaning are investigated using the methodology.
Read more... Turbine, Pump & Compressor (Axial or Centrifugal)
Multidisciplinary Turbomachinery Design, Analysis & Optimization
We can design axial turbines, Axial Pump, Centrifugal Compressor, Centrifugal Pump and Mixed Flow Compressor/Turbine with or without any pre-loaded profiles, with prismatic (cylindrical) or twisted blades, multiple extractions/injections, inter-stage heat exchangers, Curtis & Rateau stages, impulse & reaction designs, drilled and reamed nozzles, partial admission, etc. Enteknograte’s engineering team use CFD software’s such as Siemens Star-ccm+, Ansys Fluent and Numeca Fine/Turbo in co-simulation with FEA structural solvers, such as Abaqus, Ansys and MSC Nastran.
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NVH based Design and Considerations for Marine and Shipbuilding Industry including Ship, Boat, Yacht, Vessels and offshore structures
The challenge for the NVH specialists is to support the concept and design development process by reliable recommendations just-in-time prior concept or design freeze. Enteknograte’s specialists particularly use advanced methodologies for NVH simulation and optimization for Marine and Shipbuilding Industry:
- FEA based Ship, Boat, Yacht, Vessels Powertrain
- Structural Optimization
- Optimization of Ship, Boat, Yacht, Vessels Engine Dynamics based on MBD ( Multi-Body Dynamics Simulation)
- Concurrent optimization of combustion efficiency with NVH considerations for Vessels
- Ship, Boat, Yacht, Vessels and offshore structures Interior Noise Simulation based on measurement and CAE
- Ship, Boat, Yacht, Vessels and offshore structures Exterior Noise Simulation with couple use of CFD and FEA solvers
- Objective Analysis of Sound Quality
Integrated Artificial Intelligence (AI) & Machine Learning - Deep Learning with CFD & FEA Simulation
Machine learning is a method of data analysis that automates analytical model building. It is a branch of Artificial Intelligence based on the idea that systems can learn from data, identify patterns and make decisions with minimal human intervention. With Artificial Intelligence (AI) applications in CAE, that is Mechanical Engineering and FEA and CFD Simulations as design tools, our CAE engineers evaluate the possible changes (and limits) coming from Machine learning, whether Deep Learning (DL), or Support vector machine (SVM) or even Genetic algorithms to specify definitive influence in some optimization problems and the solution of complex systems.
Read more... Electromagnetic Multiphysics
FEA & CFD Based Simulation Including Thermal Stress, Fatigue, and Noise, Vibration & Harshness – NVH for Electric Motors
Enteknograte Finite Element Electromagnetic Field simulation solution which uses the highly accurate finite element solvers and methods such as Ansys Maxwell, Simulia Opera, Simulia CST, JMAG, Cedrat FLUX, Siemens MAGNET and COMSOL to solve static, frequency-domain, and time-varying electromagnetic and electric fields includes a wide range of solution types for a complete design flow for your electromagnetic and electromechanical devices in different industries.
Read more... Acoustics and Vibration
FEA and CFD for AeroAcoustics, VibroAcoustics and NVH Analysis
Noise and vibration analysis is becoming increasingly important in virtually every industry. The need to reduce noise and vibration can arise because of government legislation, new lightweight constructions, use of lower cost materials, fatigue failure or increased competitive pressure. With deep knowledge in FEA, CFD and Acoustic simulation, advanced Acoustic solvers and numerical methods used by Enteknograte engineers to solve acoustics, vibro-acoustics, and aero-acoustics problems in automotive manufacturers and suppliers, aerospace companies, shipbuilding industries and consumer product manufacturers.
Read more... Aerodynamics Simulation: Coupling CFD with MBD, FEA and 1D-System Simulation
Aerodynamics studies can cover the full speed range of low speed, transonic, supersonic and hypersonic flows as well as turbulence and flow control. System properties such as mass flow rates and pressure drops and fluid dynamic forces such as lift, drag and pitching moment can be readily calculated in addition to the wake effects. This data can be used directly for design purposes or as in input to a detailed stress analysis. Aerodynamics CFD simulation with sophisticated tools such as MSC Cradle, Ansys Fluent and Siemens Star-ccm+ allows the steady-state and transient aerodynamics of heating ventilation & air conditioning (HVAC) systems, vehicles, aircraft, structures, wings and rotors to be computed with extremely high levels of accuracy.
Read more... Fatigue Analysis of Welded Structures Using the Finite Element Method
Enteknograte use advanced Numerical simulation software and methods to simulate the welding behavior in real service load condition and estimate its Durability and Fatigue Life with Ansys Ncode, Simulia FE-Safe, MSC CAEFatigue and FEMFAT. The Seam Weld and Spot Weld fatigue simulation enables the fatigue analysis of joints including different type of welding such as fillet, overlap, spot welds in thin sheets and laser welded joints.
Read more... Finite Element Analysis of Durability and Fatigue Life
Vibration Fatigue, Creep, Welded Structures Fatigue, Elastomer and Composite Fatigue with Ansys Ncode, Simulia FE-Safe, MSC CAEFatigue, FEMFAT
Durability often dominates development agendas, and empirical evaluation is by its nature time-consuming and costly. Simulation provides a strategic approach to managing risk and cost by enabling design concepts or design changes to be studied before investment in physical evaluation. The industry-leading fatigue Simulation technology such as Simulia FE-SAFE, Ansys Ncode Design Life and FEMFAT used to calculate fatigue life of multiaxial, welds, short-fibre composite, vibration, crack growth, thermo-mechanical fatigue.
Read more... Heat Transfer and Thermal Analysis
Fluid-Structure Interaction with Coupled CFD and Finite Element Based Simulation
We analyze system-level thermal management of vehicle component, including underhood, underbody and brake systems, and design for heat shields, electronics cooling, HVAC, hybrid systems and human thermal comfort. Our Finite Element (LS-Dyna, Ansys, Abaqus) and CFD simulation (Siemens Start-ccm+, Ansys Fluent , Ansys CFX and OpenFoam) for heat transfer analysis, thermal management, and virtual test process can save time and money in the design and development process, while also improving the thermal comfort and overall quality of the final product.
Read more... Multi-Phase Flows CFD Analysis
Multi-Phases flows involve combinations of solids, liquids and gases which interact. Computational Fluid Dynamics (CFD) is used to accurately predict the simultaneous interaction of more than one combination of phases that can be gases, solids or fluids. Typical applications involve sprays, solid particulate transport, boiling, cavitation, state-changes, free surface flows, dispersed multiphase flows, buoyancy problems and mixed species flows. For example, the risks from flow or process-induced vibration excitation of pipework are widely acknowledged in onshore process plants, offshore topsides and subsea facilities.
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