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This model includes all of the standard features of the regular Patriot, with the addition of a sunroof, all-season floor mats, and the Security and Cargo group, which includes an auto-dimming mirror, roof rail cross bars and a security alarm.
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From this comparison, it is identified which wave types predominantly propagate on various regions of the rail cross-section.
At higher frequencies, above about 1.5 kHz, the rail cross-section deforms and many higher order wave types exist.
The area difference of predicted and target profiles was 13 mm2 (6.6%) and the experimental result was 12.2 mm2 at rail cross-section.
In this work, wave types that propagate primarily through separate regions of the rail cross-section are investigated for frequencies up to 80 kHz.
Models of track vibration representing the rail as a beam are insufficiently detailed for high frequencies where the rail cross-sectional deformation is significant.
The three-dimensional model includes the distribution of structural flexibility along the turnout, such as bending and torsion of rails and sleepers, and the variations in rail cross-section and sleeper length.
The track is described by a linear, three-dimensional and non-periodic finite element model of a railway turnout accounting for the variations in rail cross-sections and sleeper lengths, and including baseplates and resilient elements.
An improved rail vibration model based on the semi-analytical finite element (SAFE) method has been developed, which allows multiple layers of support and the accurate shape of the rail cross-section to be considered in the modeling.
However, from these simulations it is shown that defects have to be quite large before they can be detected using a single transducer position on the rail cross-section using train-induced vibration.
I love this passage: "As the train approaches a rail crossing, it sounds like a storm.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com