ANCO is the world's leading supplier of eccentric mass vibrators.  These field-portable systems attach to equipment and structures to determine their response to sinusoidal forcing over a range of frequencies, in order to estimate resonant frequencies, damping, mode shapes, and other dynamic properties.  Knowledge of actual dynamic properties is used to validate and improve analytical models, reveal margins unjustifiable by analysis alone, determine the source of troublesome vibrations, detect damage, and perform basic research into the dynamics of linear and nonlinear structures and structural components.  Motion transducers, and PCs which perform digital data acquisition and automatic test setup and control are also available.  ANCO vibrators have been used by universities and research laboratories to test dams, boiler structures, nuclear power plant containments, bridges, equipment, foundations, offshore oil platforms, ship s, stacks, floors, office buildings, isolated structures, and storage tanks.  The table below notes ANCO standard models.  The vibrators can be uni- or omni-directional, impart force in the vertical and/ or horizontal direction, and multiple units can be synchronized.  Custom systems are available.

Eccen- tricity 

Lb-in 

Drive Power 

40,000