6,254 research outputs found
T700 power turbine rotor multiplane/multispeed balancing demonstration
Research was conducted to demonstrate the ability of influence coefficient based multispeed balancing to control rotor vibration through bending criticals. Rotor dynamic analyses were conducted of the General Electric T700 power turbine rotor. The information was used to generate expected rotor behavior for optimal considerations in designing a balance rig and a balance technique. The rotor was successfully balanced 9500 rpm. Uncontrollable coupling behavior prevented observations through the 16,000 rpm service speed. The balance technique is practical and with additional refinement it can meet production standards
Singular continuous spectrum is generic
In a variety of contexts, we prove that singular continuous spectrum is
generic in the sense that for certain natural complete metric spaces of
operators, those with singular spectrum are a dense .Comment: 5 page
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