The influence of high-frequency excitation on piping and support design

Journal Article · Tue May 01 04:00:00 EDT 1984 · J. Pressure Vessel Technol.; (United States)

DOI:https://doi.org/10.1115/1.3264326· OSTI ID:6237324

Lockau, J; Haas, E; Steinwender, F

The effect of a high-frequency excitation on piping systems and supports is demonstrated. The influence of local plasticity on the dynamic behavior is shown in an analytical benchmark. (The evaluation of several full-scale experiments resulted in rather large safety margins between calculated and allowed stresses. The stresses were calculated following the standard nuclear codes. No failure occurred in the tested structures even under extreme overloading.) This demonstrates the high capacity of structures to survive dynamic load. A theoretical explanation is found in the effect of energy absorption by plastic deformation. This effect has been evaluated in a 1-DOF system showing for austenitic material 15 percent of material damping for 3 S /SUB m/. If this effect should be the result of modal response spectra analysis, the corresponding spectra would have to show very flat amplification ranges. The reduction of the overstresses by this approach could be shown in 2 numerical examples.

• Research Organization: Kraftwerk Union, Offenbach
• OSTI ID: 6237324
• Journal Information: J. Pressure Vessel Technol.; (United States), Journal Name: J. Pressure Vessel Technol.; (United States) Vol. 106:2; ISSN JPVTA
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
ABSORPTION
ALLOYS
AUSTENITIC STEELS
DAMPING
DEFORMATION
DESIGN
DYNAMIC LOADS
ENERGY ABSORPTION
IRON ALLOYS
IRON BASE ALLOYS
LIMITING VALUES
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
PIPES
PLASTICITY
REACTOR COMPONENTS
SPECTRAL RESPONSE
STEELS
STRESS ANALYSIS
STRESSES
SUPPORTS