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The direct study of the vibration of real engine structures with nonlinear bearings, particularly aero-engines, has been severely limited by the fact that current nonlinear computational techniques are not well-suited for complex large-order systems.
Aircraft engine structures can contain small cracks, which have developed from defects induced during material processing.
In the aero engine industry alternative manufacturing processes for load carrying aero engine structures imply fabrication.
The Aerospace division is a supplier of airframe and engine structures, components, assemblies and transparencies to a wide range of aircraft and engine prime contractors and other first tier suppliers.
It is demonstrated that, when used in conjunction with a time-marching solver like the IRM, the RHBM is a very powerful tool that should greatly facilitate the hitherto highly restricted nonlinear dynamic analysis of realistic engine structures.
Current frequency-domain techniques for the rapid computation of the steady-state periodic vibration of unbalanced rotordynamic systems with nonlinear bearings are not suitable for realistic engine structures like aero-engine assemblies.
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This innovative design configuration eliminates the cylinder-head and valve-train components of conventional engines, offering an efficient, compact and simple core engine structure".
Without changing the original engine structure, a LNG supply system and electronic control system were added to the engine.
Its period is related to the engine speed and includes specific frequency bands related to the resonances of the engine structure.
Interestingly, the engine structure of the SUTECH-SR-1 is such that the springs attached to piston are easily interchangeable, and the engine can be started up in different working conditions or with any apt spring stiffness.
A case study consisting of an aero engine structure assembly plant is presented, in which the efficiency of the resulting constraint programs is investigated.
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