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In extreme cases, residual stress can cause structural failure. Almost all vibratory stress relief equipment manufacturers and procedures use the workpiece's own resonant frequency to boost the loading experienced by induced vibration, so to maximize the degree of stress relief achieved. Some equipment and procedures are designed to operate ...
The stack ranking system was relatively secretive for a long time at Microsoft; non-manager employees were supposed to pretend they did not know about it. [33] Microsoft was involved in lawsuits regarding its forced ranking system as early as 2001. Detractors argued that the use of the system in small groups was inherently unfair and favored ...
In February 2012, GE announced studies on a more efficient derivative of the GE90, calling it the GE9X, to power both the -8 and -9 variants of the new Boeing 777X.It was to feature the same 128 in (325 cm) fan diameter as the GE90-115B with thrust decreased by 15,800 lbf (70 kN) to a new rating of 99,500 lbf (443 kN) per engine. [1]
Non-intrusive stress measurement (system), or NSMS, is a method for determining dynamic blade stresses in rotating turbomachinery. NSMS is also known by the names "blade tip timing" (BTT), [ 1 ] "arrival time analysis" (ATA), "blade vibration monitoring" (BVM), Beruehrungslose Schaufel Schwingungsmessung (BSSM), and "blade health monitoring" (BHM).
The General Electric GE90 is a family of high-bypass turbofan aircraft engines built by GE Aerospace for the Boeing 777, with thrust ratings from 81,000 to 115,000 pounds-force (360 to 510 kilonewtons).
GE evolved the F404 into the F412-GE-400 non-afterburning turbofan for the McDonnell Douglas A-12 Avenger II. After the cancellation of the A-12 in 1991, the research was directed toward an engine for the F/A-18E/F Super Hornet. GE successfully pitched the F414 as a low-risk derivative of the F404, rather than a riskier new engine.
The GE Passport is a high bypass ratio turbofan. The engine is a twin-spool, axial-flow turbofan with a high bypass ratio of 5.6:1 and an overall pressure ratio of 45:1. The front fan is attached to the three-stage low-pressure compressor; the 23:1 pressure ratio 10-stage high-pressure compressor includes five blisk stages for weight reduction.
The Mount Vernon Site, also known as the GE Mound, is a Hopewell site near Mount Vernon in southwest Indiana. The site was discovered and mostly destroyed in 1988 during road construction at a General Electric plastic manufacturing facility.