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The article presents strength simulations of a mount for mounting the test engine.
Mounted on a stationary test stand, this mount consists of external fixings, fixings to stabilize
the engine and tubular elements as a truss. These tubular elements are pipes made of seamless
black steel. The material of the truss is S235JR steel. The article examines three different
versions of the mount: mount no. 1 - initial mount, mount no. 2 - mount after a modification
of pipe arrangement, mount no. 3 - mount after a modification of pipe wall thickness. For each
version of the mount and subsequent calculation steps, the same boundary conditions and results
legend were assumed. All calculations were made in Catia v5 in the Generative Structure
Analysis module. To reflect the conditions prevailing during the engine operation on the test
bench, the following conditions as mount load were adopted: gravity from the engine mass
as 1000 N; engine thrust as 5000 N, and engine torque as 227 Nm. First, the model was
pre-calculated to check the influence of mesh size on the obtained results. 2 mm parabolic
tetrahedral elements were used in a computational grid. All subsequent steps of the mount
modification showed a positive effect of reducing the maximum stress values or their mitigation
as dispersion over a larger area. The changes made it possible to eliminate potentially dangerous
areas of stress accumulation points. The material used has a strength several times greater
than the stresses occurring in the tested elements. It was found that no further modifications
to the mount are required and it is possible to use the created geometry on the test stand.
