Vibration Response of a U-Tube Bundle with Anti-Vibration Bar Supports due to Turbulence and Fluidelastic Excitations

Flow-induced vibration testing of replacement thermowell designs

“…Table 1 lists all pertinent parameters for the thermowell cases. The corresponding parameters for the comparison U-tube example cases are those reported by Haslinger and Steininger (1995).…”

“…Methodologies involved in the determination of dimensionless turbulence force spectra from experimental results on tubular arrays have been documented by Axisa et al (1990) and Haslinger and Steininger (1995). Using turbulence response measurements at a particular location, the knowledge of the mode shape, an estimate of the flow velocity distribution along the structure, the dimensional properties, the turbulence correlation length, the structural natural frequency and damping, combined with theoretical considerations for the response of a structure due to turbulence excitation, an expression for determination of nondimensional forcing functions, per unit length, may be written as Application of this methodology requires that the structure response due to turbulence occurs at discrete frequencies for which the modal, narrow-band r.m.s.…”

“…Several thermowell cases were evaluated and are compared in Fig. 13 to the five example cases reported by Haslinger and Steininger (1995), as well as to the upper limit and mean expressions suggested by Axisa et al (1990). Table 1 lists all pertinent parameters for the thermowell cases.…”

Numerical Investigation of Interaction Between Tubes and Loose Supports Caused by Turbulence-Induced Vibration in Steam Generators

“…7-10 K. Haslinger carried out tests on anti-vibration bars by motor excitation tests and water tunnel tests, and the results of the friction coefficients are almost independent of impact angle. 11,12 Guo and Tan finished tests on the impact-sliding behavior of three kinds of supports, and the dimensionless normal work rate was proved to be not monotonic with the change of dimensionless clearance. 13,14 Figure 1.…”