Demonstration of the PADRE component assessment mode. This analysis considers a component-centric MADRE 5 spoke reaction wheel model with a steel flywheel. Re-entry is predicted from a circular orbit from 130km altitude using the MADRE version of SESAM. This is enhanced over the current DRAMA 3.0.4 with the inclusion of support for ring primitives, material catalycity and automatic scaling of voxel size. Orbital inclination is selected randomly from a uniform distribution across the full range. An undemisable parent vehicle with a ballistic coefficient randomly selected in the range 50kg/m^2 to 200kg/m^2 is chosen and propagated to a release altitude of between 50km and 100km, at this point the child sub-assembly is released and its various components are propagated to demise or impact. Normal PADRE uncertainties on material properties, heating, drag and atmospheric densities are also applied. A standard Monte-Carlo analysis of 5000 simulations has been executed.
The following plots show results for individual impacting fragments, providing a profile of the scale of fragments that survive. Data is only shown where fragments generate a casualty risk.
Profile of the casualty area resulting from individual fragments as a function of release altitude.
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Profile of the fragment area resulting from individual impacting fragments as a function of release altitude.
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Profile of the fragment landed mass resulting from individual impacting fragments as a function of release altitude.
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Profile of the fragment energy resulting from individual impacting fragments as a function of release altitude.
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©Belstead Research Limited 2021