\ Design and Construction of a Quasi-Zero-Stiffness Vibration Isolator of a Small Size

Design and Construction of a Quasi-Zero-Stiffness Vibration Isolator of a Small Size

Supervisor: Akgün

Reference:  VIBISOL1 (Acronym)

Student: Sarp Gönülkırmaz

(From Carrella, A., Brennan, M. J. ve Waters, T. P. 2007. “Optimization of a Quasi-Zero-Stiffness Isolator”, Journal of Mechanical Science and Technology, 21, 946-949.)

There are various approaches to isolate a system/instrument/building from vibration. Such systems are available for isolating buildings from earthquake effects, electronic instruments from the body of aircraft/spacecraft, cameras from the body of moving journalists / cameramen, etc. Some of these isolators are for large bodies and do not have significant size restrictions that may hinder their functioning. The project involves feasibility investigation, design and construction of a quasi-zero-stiffness (QZS) isolator that has to fit in a tight volume. Referring to the above figure, which shows a schematic of a QZS isolator, when a time-varying force f is applied to the top node, a small portion of it should be transmitted to the bottom support and vice versa. The task is to find optimum parameter values so that minimum force transmission is achieved.
Work Description:

  • Literature survey.
  • Understanding the standart that will be used in the design.
  • Derivation of the equation of motion of QZS isolator with a mass on top of it.
  • Solution of the equation of motion and optimization of the stiffness parameters.
  • Construction of a QZS isolator and experimentation.,

Required Qualifications and Skills:

  • To be enrolled in or to have taken ME 445.
  • Interest in theoretical and experimental work.