ADINA FSI
Fluid-Struktur-Interaktion tritt auf, wenn eine Strömung die Deformation der Struktur verursacht. Diese Deformation wiederum verändert die Randbedingungen der Strömung.
ADINA bietet die Fluid-Struktur-Interaktion in einem einzigen Programm für die Lösung von Problemen, bei denen die Fluide voll gekoppelt sind mit beliebigen Strukturen, die sich stark nichtlinear verhalten aufgrund von großen Verformungen, Kontakt und/oder Temperaturabhängigkeiten.
Auf der Strömungsseite kann die Navier-Stokes Strömung inkompressibel, leicht kompressibel oder stark kompressibel (schnell oder langsam komprimierend) sein.
Auf der Strukturseite können alle Elementtypen wie Schalen, 2D- oder 3D- Volumen, verschiedene Balken, Kontaktflächen usw. verwendet werden.
Zusätzlich bietet ADINA FSI sehr effiziente voll gekoppelte Fluid-Struktur-Interaktion für Fluide, die als akustisches Medium definiert sind.
FSI Simulation einer Fahrzeugtürdichtung
Das ADINA System wird extensiv für die Lösung komplexer Probleme der Fluid-Struktur-Interaktion eingesetzt. Ein interessantes Beispiel für eine solche Anwendung ist die Simulation einer Fahrzeugtürdichtung. Die Dichtung besteht aus Gummi und umschließt einen luftgefüllten Raum. Wenn die Dichtung zusammengedrückt wird, strömt die Luft durch kleine Öffnungen aus. Das zu erwartende Energieniveau zum Komprimieren der Dichtung sowie das Verhalten der Dichtung in Abhängigkeit von der Schließgeschwindigkeit können durch diese Analyse effizient vorherbestimmt werden. ....
3-D FSI Analysis with Automatic Remeshing
The fully coupled Fluid-Structure Interaction (FSI) capability of ADINA is a powerful tool for industrial applications. The flow indicator depicted above is an effective demonstration of the robustness and flexibility of ADINA FSI. Visual flow indicators are commonly used in applications where both a visual inspection is critical and a minimum flow rate is required ....
ADINA-FSI Analysis with Nastran Input
In the ADINA News, April 15, 2006, we featured the use of Nastran models to run CFD fluid-structure interaction (FSI) analyses, and showed results of a shock absorber solved with a Nastran model in ADINA. As Nastran is widely used in the industry, many pre-processors can be employed to prepare models in the Nastran format. ....
Analysis of Automotive Hydraulic Engine Mount
Hydraulic engine mounts are used to reduce automotive engine vibration and noise. The performance of the hydraulic engine mount due to variations in the excitation frequency and amplitude is of interest to the designer. The above animation shows the results of the ....
Analysis of Another Automotive Hydraulic Engine Mount
In the ADINA News Group Addendum, Analysis of Automotive Hydraulic Engine Mount (May 15, 2002), we presented an analysis of an automotive hydraulic engine mount. This time, we present a simulation of a hydraulic engine mount of another design. As in the previous analysis, a sinusoidal displacement is applied to the top of the engine mount. The figure above shows first the solid mesh (blue) followed by the fluid ....
Rotating-Disk-Activated Valve for an Exhaust System
FSI (fluid-structure interaction) analysis has many applications in the automotive industry such as the analysis of shock absorbers and valve mechanisms. In the ADINA System, the ADINA-FSI program provides fully coupled analysis of fluid flow with structural interaction problems, meeting the needs of automotive and other industries ....
Benchmarking FSI Capabilities
An important task in the development of ADINA is the appropriate verification and benchmarking of the code. This requires comparing ADINA solutions with analytical results, published computed or experimental data, making convergence studies, and so on. The verification and benchmarking of a code for FSI solutions involving flexible structures and Navier-Stokes fluids is particularly difficult because relatively few results to compare with have been published ....
Benchmarking Thermal FSI Capabilities
In an earlier News we focused on the benchmarking of fluid-structure interaction finite element procedures assuming that there are no temperature effects, see also the reference given below. Of course, there are many problems where changing temperature conditions must be included in the analysis. The temperature may vary spatially over the problem domain and may change as a function of time. The problem domain considered here is the solid/structure fully coupled with the fluid. The temperature changes may then significantly affect the analysis results, including the deformations and stresses in the ....
Fully Coupled Thermal FSI Analysis
In many engineering structural analyses, high temperature conditions inducing thermal stresses are encountered. Frequently, these structural conditions are also fully coupled to fluid flows. ADINA can be efficiently used for such fully coupled thermal fluid flow structural analyses. The fluid is modeled with the general CFD capabilities in ADINA and the structure is modeled including all nonlinearities, like large deformations, inelastic effects, and contact, available in ADINA. The fully coupled thermal FSI solution is obtained with the general ADINA FSI capabilities and ....
Dynamic Analysis of Piping System
The animation shows the dynamic analysis of a simplified piping system, similar to those used in nuclear power plants. The analysis is performed using the ADINA subsonic potential-based fluid elements to model the water in the pipe and the ADINA 4-node shell elements (MITC4 elements) to model the pipe walls. ....
Electro-Mechanical Coupling with Fluid-Structure Interaction
Micro-Electro-Mechanical Systems (MEMS) are designed on scales at which electrostatic forces are capable of moving or deforming various parts of these devices. In ADINA version 8.3, such phenomenon can be simulated with the new electrostatic modeling capability. We demonstrate this new capability with an example involving electro-mechanical coupling with fluid-structure interaction. ....
EnSight with ADINA
Efficient pre- and post-processing is most important in CFD. ADINA CFD can now also be used with EnSight. In this News, we illustrate such use by considering the Thermal CFD and Stress Problem of an Exhaust Manifold that already was solved in the News of June 15, 2007. All figures and results shown here have been generated using EnSight with results computed in ....
Airbag Deployment FSI Simulation
The uniqueness of the analysis described here is that the shell model fully coupled with the Navier-Stokes fluid model is solved using the implicit time integration algorithm in ADINA. This ensures that at each discrete time step considered, iterations are performed to satisfy the fully coupled mass and momentum equations for the solid and the fluid regions at that time. ....