List of Articles Impact damper

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  1 - Analysis of Nonlinear Vibrations of Impact Dampers in Boats
  Anoshirvan Farshidianfar Mahdiye Shafipoor Milad Sabbagh Sabzevar
  Safety and comfort are two important aspects that should be considered in designing a good transportation system such as a high speed boat. One important thing that affects this consideration is the shock vibration when a wave impacts the boat. The shock vibration will More

  Safety and comfort are two important aspects that should be considered in designing a good transportation system such as a high speed boat. One important thing that affects this consideration is the shock vibration when a wave impacts the boat. The shock vibration will induce great acceleration that could be felt by the boat crews. Moreover, in severe cases a crack could spread out at the bottom of the boat. Impact damper is a kind of vibration absorber which decreases unwanted vibration amplitude in a short time by using momentum exchange principle and energy dissipation. This paper studies the operation of an impact damper to attenuate the undesirable vibration of a boat by using the two variable expansion method. It aims at considering the effective factors on impact duration, coefficient of restitution and reducing the amplitude of vibration of the main mass by using the two variable expansion method. The results of analytical computations of this study are compared with other researches and confirm their findings; in addition, it shows that the two variable expansion method is accurate in solving nonlinear problems. Manuscript profile
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  2 - Application of Single Unit Impact Dampers in Protective Systems
  Aref Afsharfard Mohammad Golmohammadi
  In the present study, free vibration of a vibratory system equipped with an impact damper, which incorporates the Hertzian contact theory, is investigated. A nonlinear model of an impact damper is constructed using spring, mass and viscous damper. As a practical case st More

  In the present study, free vibration of a vibratory system equipped with an impact damper, which incorporates the Hertzian contact theory, is investigated. A nonlinear model of an impact damper is constructed using spring, mass and viscous damper. As a practical case study, a five-story building is simulated in SimMechanics toolbox of MATLAB software. Performance of the impact dampers to suppress structural vibrations of the structure is studied. It is shown that the impact dampers can effectively suppress undesired vibrations of all of the building floors.. For quenching vibrations,  in order to show the ability of impact dampers , the so-called "effectiveness" is introduced. Finally, it is shown that  the impact damper can increase the effectiveness up to 34 percents. Manuscript profile