Morbidity patterns among heavy equipment operators exposed to whole-body vibrations 1975 : followup to a 1974 study /

Follow-up to Relationship between whole-body vibration and morbidity patterns among heavy equipment operators, by T. H. Milby and R. C. Spear.

The influence of ultrasonic vibrations upon the physical features of activated sludge.

Thesis (M.S.)--University of Illinois.

Devices for damping mechanical vibrations, a bibliography.

Cover title.

Monitoring vibrations at U.S. Borax and Chemical Company potash refinery, final report /

U.S. Atomic Energy Commission Plowshare Program -- Cover.

Vibrations of ring-stiffened cylindrical shells.

"AFSWP no. 873. Office of Naval Research. Contract no. Nonr-266 (08) Technical report no. 13. CU-13-55-ONR-266 (08)-CE."

Planar vibrations of chlorinated benzenes,

Mode of access: Internet.

Damping of rectangular plate vibrations

"Materials Laboratory, Contract no. AF 33(616)-5426, Project no. 7360."

On the utilization of the concept of boundary impedance in vibrations of bars

"Materials Laboratory, Contract no. AF 33(616)-5426, Project no. 7360."

Steady state undamped vibrations of a class of nonlinear discrete systems

"Materials Laboratory, Contract no. AF 33(616)-5449. Project no. 7360."

Damping of flexural vibrations by alternate visco-elastic and elastic layers

"Materials Laboratory, Contract no. AF 33(616)-5426, Project no. 7360."

Construction loads and vibrations /

"Report no. ITRC FR 94-3".

Theorie des vibrations et son application a divers phénomènes de physique.

Mode of access: Internet.

On torsional vibrations in axles and shafting,

Mode of access: Internet.

Crack detection in welded mechanical structures using coupled vibrations

Detection of a fatigue crack in a welded frame structure is studied in this paper using coupled response measurements. Similarity to real engineering structures is maintained in the fabrication of the test frame with hollow section chords and branch members. The fatigue crack was created by a special reciprocating mechanism that generates cyclic stress on a beam member of the structure. The methodology of coupled response measurements is first demonstrated on a single hollow section beam by analytical simulation and experimental validation. The issues of using this approach for fatigue crack detection in real structures are then examined. Finally, the experimental results of the frame under different scenarioes are presented. The existence of the crack is clearly observable from the FRF plots. It is suggested that this approach offers the potential to detect cracks in welded frame structures and is a useful tool for routine maintenance work and health assessment.