harmonic vibration

harmonic vibration

[här′män·ik vī′brā·shən]
(mechanics)
References in periodicals archive ?
A fine thread adjustment permits users to tune out harmful harmonic vibration in the field.
introduced its Winder 2000 Stretch Web model for high-end film two years ago, the company kept quiet about how the winder could ramp up to full speed without any harmonic vibration.
The extraordinary structural efficiency of the steel frame made the tower significantly lighter than a conventional structure of its height and therefore far more subject to lateral harmonic vibration due to the buffeting of winds.
The topics include examples of physical systems described by the Duffing equation, analysis techniques for its various forms, the forced harmonic vibration of a Duffing oscillator with different damping mechanisms, and the forced harmonic vibration of an asymmetric Duffing oscillator.
Following a well-known procedure, we write [zeta](z,t) = [zeta](z)sin [ohm]t, [theta](z,t) = [theta](z)sin [ohm]t, where [zeta](z) and [theta](z)are amplitudes of assumed harmonic vibration.
During machining, a tool develops a harmonic vibration that travels down the length of the bar.
The small print on the box says: "This revolutionary training technique delivers harmonic vibration to the body, stimulating a natural reflex.
The fans and motors were put through a harmonic vibration check to determine if any speeds needed to be locked out of the system between 1800 and 3600 rpm (VFD frequency between 30 and 60 Hz).
Single point or frequency sweep loading is available, and techniques are also available to equivalence random vibration to harmonic vibration.
In sections on vibrations systems, principles and guidelines for damping control, and the design of supplemental damping, they discuss such topics as the free and harmonic vibration of single-degree-of-freedom systems, linear proportionally damped multi-degree-of-freedom systems, principles of damper design, and nonlinear damping.
This set up a nice harmonic vibration in the ground which was recorded in our nearby borehole seismometers.
Features of the 70-400 series include laser cut bodies for accurate cutting, laser cut expansion slots to reduce harmonic vibration, and a laser cut and polished bore for true centering of the blade.