Effect of tube-support interaction on the vibration of a tube on multiple supports

Shin, Yooleemi; Jendrzejczyk, J.A.; Wambsganss, M.W.

doi:10.2172/7227358

Cited by 6 publications

(4 citation statements)

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“…Tube response character- Several studies show that this assumption is indeed applicable, although there are some variations: of resonant frequencies [1][2][3][4] . With this assumption, the simple beam theory can be used to predict the tube natiural frequencies as well as tube responses to different excitations [5,6].…”

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confidence: 99%

Dynamics of tubes in fluid with tube-baffle interaction

Chen

Jendrzejczyk

Wambsganss

1983

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DISCLAIMERThis report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States '3.vernment nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibldty for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Refer. ence herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recom-

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confidence: 99%

Dynamics of tubes in fluid with tube-baffle interaction

Chen

Jendrzejczyk

Wambsganss

1983

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“…The constants a., and a_ for the proportional system damping (see Eqs. For the in-water condition, the added mass due to the surrounding water along the length of the tube is included, but the fluid viscosity and the added mass due to the gap fluid between the tube and the baffle-hole are neglected because, when the baffle thickness is much smaller than the length of the tube span, the gap fluid has a negligeable effect on system response [5]. Two different loading conditions are used (see Fig.…”

Section: A Description Of a Numerical Modelmentioning

confidence: 99%

Vibro-impact responses of a tube with tube--baffle interaction. [LMFBR]

Shin

Sass

Jendrzejczyk

1978

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“…Several studies show that this assumption is indeed applicable, although there are some variations of resonant frequencies [1][2][3][4] . With this assumption, the simple beam theory can be used to predict the tube natural frequencies as well as tube responses to different excitations [5,6].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Tubes in Fluid With Tube-Baffle Interaction

Chen

Jendrzejczyk

Wambsganss

1985

Journal of Pressure Vessel Technology

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Three series of tests are performed to evaluate the effects of tube to tube-support-plate (TSP) clearance on tube dynamic characteristics and instability phenomena for tube arrays in crossflow. Test results show that, for relatively large clearances, tubes may possess “TSP-inactive modes” in which the tubes rattle inside some of the tube-support-plate holes, and that the natural frequencies of TSP-inactive modes are lower than those of “TSP-active modes,” in which the support plates provide “knife-edge”-type support. Tube response characteristics associated with TSP-inactive modes are sensitive to tube-to-TSP clearance, TSP thickness, excitation amplitude, tube alignment, and the fluid inside the clearance. In addition, tube response is intrinsically nonlinear, with the dominance of TSP-inactive or TSP-active modes depending on the magnitudes of different system parameters. In general, such a system is difficult to model; only a full-scale test can provide all the necessary characteristics. A tube array supported by TSPs with relatively large clearances may be subjected to dynamic instability in some of the TSP-inactive modes; tube response characteristics and impact forces on TSPs for a tube row are studied in detail. Tube displacements associated with the instability of a TSP-inactive mode are small; however, impacts of the tube against TSPs may result in significant damage in a relatively short time.

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Effect of tube-support interaction on the vibration of a tube on multiple supports

Abstract: employs the staff and operates the Laboratory in accordance with policies and programs formulated, approved and reviewed by the Association.

Cited by 6 publications

References 1 publication

Dynamics of tubes in fluid with tube-baffle interaction

Dynamics of tubes in fluid with tube-baffle interaction

Vibro-impact responses of a tube with tube--baffle interaction. [LMFBR]

Dynamics of Tubes in Fluid With Tube-Baffle Interaction

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