New in ANSYS 9.0: Core Technology Enhancements
The core technology is still based on all solvers of ANSYS products. ANSYS 9.0 provides enhancements in the following aspects: modeling and analysis of spot welding, modeling of thick-shell structures, nonlinear analysis of superelastic structures with mesh re-division and ANSYS thermoelectric coupling.
Multiphysics
The direct coupling of thermoelectricity, which is very important for the electronic cooling industry, has been strengthened in the 9.0 version. Today's coupling features support: Seebeck, Peltier, Thomson and transient electromagnetic effects (capacitance damping). The enhancement of the thermoelectric coupling analysis function also enables ANSYS to meet the simulation requirements of thermoelectric application products. The characteristics of such products are: temperature stable or cyclic, compact design with compact heat dissipation devices, examples of digital thermometers, microprocessor cooling And a new generation of car-mounted portable refrigerators powered by cars.
High frequency electromagnetic analysis
Version 9.0 adds high-frequency electromagnetic (full-wave) analysis capabilities to meet the analytical needs of the new high-frequency market. A scattering analysis that can transmit plane wave waveguide ports to accommodate cyclic symmetry structures has been added. Such a structure is commonly referred to as FSS (Frequency Selective Surface), which is commonly used in the analysis of microwave oven viewing windows. The "RLC" circuit unit is now also included in high frequency analysis. Like the ANSYS low frequency circuit unit, this feature greatly simplifies many high frequency analyses. The new post-processing feature calculates the Smith chart and SAR (SAR) for lossy materials. The SAR function is very important when studying the effects of high frequency energy on biological tissues.
Structural and thermal analysis
In the automotive and aerospace industries, there are many times when modeling spot weld joints between multiple sheet metal parts. Spot weld joints affect the strength and fatigue properties of the sheet to a considerable extent. The traditional method of spot welding modeling requires that the mesh of the different components of the joint must match and not take into account the radius of the spot weld. ANSYS supports the independent meshing of components, which are not related to each other, and then connect the components by spot welding technology. The position of the spot weld is not limited by the surface nodes.
For assemblies that contain some thick, thin parts, such as the surface of an automobile body, electronic components, etc., the connection of these shells and solid elements typically requires special nonlinear contact treatment. The analysis of these structures requires special measures, such as the use of solid elements to model thin-shell structures, to handle variable thickness components, or simply to improve accuracy. The entity-shell unit of ANSYS 9.0 can easily solve the above problems. Since the form of these units is the same as that of the solid elements, the assembly of the thick and thick structures becomes very simple.
It is well known that rubber materials in nature are very flexible. ANSYS uses a superelastic material model to simulate these materials. Large deformation analysis of superelastic structures usually causes severe distortion of the finite element mesh, which can seriously cause the accuracy of the solution to decrease and the convergence to be difficult. The mesh re-division feature of ANSYS 9.0 redefines the deformed region mesh to solve for smooth convergence. Other problems such as metal forming are also solved.
Thermal radiation analysis requires calculation of the radiation angle, which will add a lot of computation for large models. In ANSYS 9.0, the function of radiation analysis introduces a new algorithm that can coarsely coarse the underlying elements when calculating the radiation angle. In addition, planar and axisymmetric models can be used in radiant heat analysis, which greatly reduces the computational time of bolometric analysis.
In addition to the above new features, the ANSYS 9.0 version also has significant improvements in flexibility and ease of use in the pre/post processing.
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