| 摘要 |
A method and an apparatus for damping the vibrations of circumferentially extending and generally cantilevered tubing segments of a cooling manifold of a gas turbine engine which is disposed in a generally concentric relationship with and attached to an annular engine casing. The vibration damping means comprises a plurality of clip elements, with each clip element being attached to a pair of axially adjacent ones of the tubing segments at a location proximate free ends of the tubing segments which engage an axially extending manifold plenum in slip joint connections. Each clip element comprises first and second arcuate retainers connected by an arcuate spacer section which establishes the proper axial spacing between the retainers. At least one of the retainers engages the corresponding tubing segments in an interference fit, with each retainer establishing an interference fit in a preferred embodiment. The clip elements increase the natural frequency of the corresponding tubing segments above the principle engine excitation range by increasing the vibrational spring constant of the tubing segments. The clip elements comprise a unitary construction and can be installed by hand in a preferred embodiment or with the assistance of a hand-held tool in an alternate embodiment, thereby providing an economical means of construction and of installation.
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