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It is difficult to determine the root causes of failures in complex systems. This project will develop a Bayesian network inference engine to create Probabilistic root-cause trees for failure mode effects analysis. Anomalies and scope of failure will be determined based on element and path failure probabilities inferred from the Bayesian network. Information, such as health condition and cause-effect propagation time, will be provided. The inference results can also be used to enable autonomous strategies and mission planning.
Jackson State
This project will develop an add-on decision support system for the COTS MAXIMO database used by SSC to manage assets and maintenance. This tool will provide capabilities specific by the SSC MAXIMO managers, enhance current data analysis capabilities, and enable incorporation of advanced techniques, such as machine learning.
MS State
The project will create an automated, coupled, fluid-thermal-structural simulation capability through the development of robust communication layers between Loci-CHEM and MAST. The communication layers enable surface-to-surface coupling (conjugate-heat-transfer, cavity radiation-conduction coupling, fluid-structure interaction) and volume-to-volume coupling (thermoelasticity) for large-scale discretizations. Validation of the solver will be performed using canonical test cases, such as periodic motion of a flexible structure in a cylinder's wake. The nature of responses will range from quasi-steady (large characteristic time) to high-frequency (acoustic). The coupling environment will be HPC-capable and will account for incompatibilities in geometric representation of the interacting surfaces/volumes.
MS State
Testing rocket engines creates plumes of hot exhaust gases that induce radiative and convective heating of the test facility structure. Test facility designers simulate those processes to determine appropriate design margins. Current modeling approaches are slow, cumbersome and conducted in a piecemeal manner. To overcome this technical barrier, this project will couple Calculix with Loci/CHEM using techniques developed for use with the LS-DYNA and ABAQUS finite element codes. Validation of the system will include applying the new code to a real engineering boundary value problem.
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