Showing papers on "Dynamic Vibration Absorber published in 1975"
TL;DR: In this article, large scale systems have been proposed for absorbing and utilising the energy carried by ocean waves, which are called point absorbers and linear absorbers, respectively, when the system is made as a straight construction, at least a few wavelengths long.
Abstract: VARIOUS large scale systems have been proposed for absorbing and utilising the energy carried by ocean waves1–4. In principle, such a system consists of a damped oscillator which interacts with the wave. The net result is that energy is transferred from the wave to a load. Here we call a system a ‘point absorber’ when its horizontal extent is much smaller than one wavelength, and a ‘linear absorber’ when the system is made as a straight construction, at least a few wavelengths long1.
392 citations
TL;DR: In this article, an analysis of two types of self-excited, two-degree-of-freedom systems is presented, in which the basic subsystem is governed by a Van der Pol differential equation.
33 citations
Patent•
03 Mar 1975TL;DR: In this paper, a drive line vibration absorber for a mass elastic system having an engine operatively connected to a gear train through an elongated drive shaft is proposed. But the system is not suitable for high-velocity torsional vibration.
Abstract: A drive line vibration absorber, for a mass elastic system having an engine operatively connected to a gear train through an elongated drive shaft, includes an inertia mass disposed in parallel relation to such mass elastic system and a resilient ring secured to the mass elastic system in axially driving cooperation with the inertia mass and permitting limited torsional movement thereof for effectively reducing the amplitude of the relatively low natural frequency torsional vibrations of the mass elastic system.
14 citations
11 citations
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4 citations
Patent•
13 Feb 1975
TL;DR: In this paper, a single-tube telescopic vibration absorber consisting of a cylinder filled with damping liquid, a damping piston fitted with throttles, the piston dividing the cylinder into an upper and a lower space; a gas space which is under superpressure; and a separating piston arranged between the lower space and the gas space.
Abstract: Single-tube telescopic vibration absorber comprises a cylinder filled with a damping liquid; a damping piston fitted with throttles, the piston dividing the cylinder into an upper and a lower space; a gas space which is under superpressure; and a separating piston arranged between the lower space and the gas space. A pressure box is provided made of an elastically and plastically deformable material whose modulus of elasticity decreases with increasing temp. Polyurethane is suitable. Relatively moderate superpressure (less than 25 atm.) may be tolerated in the gas space, reducing risk of leakage during fast driving over bad roads and increasing service life. Driving safety and comfort are improved.
3 citations
2 citations
1 citations