Support Flexibility and Natural Frequencies of Pipe Mounted Thermowells

Author:

Bartran David S.1

Affiliation:

1. Mem. ASME Exothermics, Inc., 14 Columbia Drive, Amherst, NH 03031 e-mail:

Abstract

A simplified model of a pipe mounted thermowell provides a measure of insight into the design and application of intrusive pipe fittings. A combination of Fourier and Green’s function methods together with a distributed load model of the thermowell/pipe wall interface are used to calculate the support compliance and subsequently the natural frequencies of the thermowell. These are compared with limited though independent calculations. This comparison confirms a profound reduction in natural frequencies for commonly encountered thermowell installations, reductions that should not be ignored where the risk of flow-induced resonance is high.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Reference16 articles.

1. Thermowells—Performance Test Codes;ASME,2010

2. Porter, M. A., and Martens, D. H., 2002,“Thermowell Vibration Investigation and Analysis,” ASME Pressure Vessels and Piping Conference, Vancouver, BC, Canada, Aug. 5–9, pp. 171–176.

3. Extension and Update of the Guidelines for the Avoidance of Vibration Induced Fatigue of Process Pipework, Intrusive Element Assessment,2007

4. Thin Cylindrical Shells Subjected to Concentrated Loads;Q. J. Appl. Math.,1946

5. On Radial Deflections of a Cylinder Subjected to Equal and Opposite Concentrated Radial Loads-Infinitely Long Cylinder and Simply Supported Cylinder With Simply Supported Ends;ASME J. Appl. Mech.,1957

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Modal Analysis of Flange-Mounted Thermowells;Journal of Pressure Vessel Technology;2019-10-09

2. The Drag Crisis and Thermowell Design;Journal of Pressure Vessel Technology;2018-05-10

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