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Minor updates.
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cbolisetti authored and sveerara committed May 17, 2019
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Made progress in implementing an explicit solver that will significantly reduce runtime. The explicit solver is benchmarked by comparing results of simple problems with the corresponding implcit, Newmark-Beta solution. The explicit solver is expected to be merged into the MOOSE framework in summer 2019 after thorough testing and will include both consistent and lumped-mass matrix options.
Made progress in implementing an explicit solver that will significantly reduce runtime. The explicit solver is benchmarked by comparing results of simple problems with the corresponding implicit, Newmark-Beta solution. The explicit solver is expected to be merged into the MOOSE framework in Summer, 2019 after thorough testing and will include both consistent and lumped-mass matrix options.

The implementation comprises changes to the MOOSE framework and includes a new, `CentralDifference` TimeIntegrator. The implementation includes several other changes that make the usage of the explicit solver extremely easy to use. The user is simply required to change the TimeIntegrator in the Executioner and add the input 'implicit = false' in the strain kernels. Sample results for a single solid element problem are presented in [image001].
The implementation comprises changes to the MOOSE framework and includes a new, `CentralDifference` TimeIntegrator. The implementation includes several other changes that make the usage of the explicit solver extremely easy to use. The user is simply required to change the TimeIntegrator in the Executioner and add the input statement, `implicit = false`, in the strain kernels. Sample results for a single solid element problem are presented in [image001].
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A beam mesh generator has been created and is currently under testing. The mesh generator will input nodal co-ordinates and beam connectivity information through csv files and will create a mesh automatically. This circumvents the usage of a meshing software and provides a much easier way to import meshes from traditional structural engineering software like SAP2000 or GTStrudl.
[image002] shows an L-shaped mesh and the corresponding input csv files created for testing. More tests and examples will follow. This will be implemented in summer 2019.
[image002] shows an L-shaped mesh and the corresponding input csv files created for testing. More tests and examples will follow. This will be merged with MASTODON in Summer, 2019.
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Extended the Response History Builder, Response Spectra Calculator and HSI Calculator vector post processors to accept sets of nodes, or boundaries at input. Users do not have to create an individual VPP block for history, or spectrum at each node anymore. This makes the MASTODON `ResponseHistoryBuilder`, `ResponseSpectraCalculator`, and the `HSICalculator` more user friendly. Illustrations and examples are provided in the corresponding documentation pages.
Extended the `ResponseHistoryBuilder`, `ResponseSpectraCalculator` and `HSICalculator` vectorpostprocessors to accept sets of nodes, or boundaries at input. Users do not have to create an individual VPP block for history, or spectrum at each node anymore. This makes these VPPs more user friendly. Illustrations and examples of the updated VPPs are provided in the corresponding documentation pages.
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