See “Shell-to-solid submodeling and shell-to-solid coupling of a pipe joint,” Section For example, a static analysis performed in ABAQUS/Standard can drive a. Perform solid-to-solid, shell-to-shell, and shell-to-solid submodeling. Targeted This course is recommended for engineers with experience using Abaqus. script to perform the steps of the method in an automatic manner. Using the Keywords: Abaqus, Ansa, Meta, Submodelling, Multiscale analysis, Polymers .. scales from shells to solids, further constraints must be introduced, increasing the .
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Saving the results to the output database. The only link between the submodel and the global model is the transfer of the time-dependent values of variables saved in the global analysis to the relevant boundary nodes of the submodel.
If the global element set is defined at the assembly level, you may provide the element set name without qualifying it with the assembly name in a submodel analysis. The driven baaqus for the submodel are the nodes lying on the specified surface. The time scale cannot be specified in frequency domain analyses or in linear perturbation steps.
You cannot select an increment in a general submodel step. The acoustic nodal pressures from the global analysis must be written to the results file for the acoustic mesh in contact with the structural surface of interest. The dimensionality of the submodel must be the same as that of the global model: If interpolation between dissimilar meshes is necessary, the global output database file must be used to read the temperatures.
The global model can contain both solid and shell elements; however, when the shell-to-solid capability is used, all driven nodes must lie within shell elements in the global model. Mixing general and linear perturbation steps in shell-to-solid submodeling. Next, run a submodel heat transfer analysis using the mesh mesh2 that is required for the final submodel thermal-stress analysis, and write the nodal temperatures to the results or output database file.
These requirements do not apply to quasi-static problems.
Shell-to-solid submodeling and shell-to-solid coupling of a pipe joint
No such refinement was performed in this example. After the lecture, workshop sessions are conducted offline with technical support provided by hosting office via phone and email. tk
In this problem the joint between a pipe and a plate is analyzed. However, variables at the nodes given do submodelign have to be driven in all steps: The exterior tolerance in solid-to-solid submodeling. The following limitations apply: This is often the case for metal structures in air, building interiors, or for sound propagation from a liquid to air.
Subomdeling continuity of displacements and the minimal distortion of the stress field at the shell-to-solid interface indicate that the shell-to-solid coupling has been modeled accurately. The exterior tolerance in shell-to-solid submodeling.
Online-Submodeling with Abaqus
The assumptions depend on the geometric formulation used linear or nonlinear and on the procedure combination.
Finally, run the submodel thermal-stress analysis using the temperatures as field variables obtained from the results or output database file for the submodel heat transfer analysis and the displacements as driven variables obtained from the global thermal-stress analysis. Mesh constraints are typically applied on the edge of a sliding boundary region to fix it spatially.
The mesh of the reference solution in the vicinity of the joint is very similar to that used in the submodeling and shell-to-solid coupling analyses.
In the case of a structure driving a fluid, you must ensure that the degrees of freedom to be driven in the submodel exist among the global model results. Corners or kinks may exist in global models made of shell elements.
The distance checked against the specified exterior tolerance is shown in Figure Neither the coupled thermal-electrical procedure nor any of the mode-based dynamics procedures can be used on the submodel level. Use both of the following options: ABAQUS will determine the values that the driven variables will follow throughout the step in the submodel analysis by using the points in time at which the global solution sbumodeling or output database file was written.
The acoustic-to-structure submodel analysis solves an uncoupled structural force-displacement problem. The output database can be transferred to any platform since it is binary neutral. Other perfprm of the submodel may be driven using the displacements of the structural component of the global model via solid-to-solid submodeling.
A thin layer of fluid elements, with the same properties as the submodel fluid, can be added to the global model; this element set and ot nodes can then be used to drive the submodel in the usual manner. Optional parameters Optional parameters: The end of the pipe that is attached to the plate leads to deformation of the plate itself see Figure 5 and Figure 6.
Preferably the displacement results for the nodes that are used to drive the submodel should be saved for each increment. The only restriction on the specification of the frequency range in the submodel is that the minimum and maximum frequency should lie within the range of calculated frequencies in the global model. Thus, only one layer of driven nodes lies within the center zone, and only these nodes have all three displacement components driven by the global solution.
Types of submodeling available.