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Type of Document	Dissertation
Author	Masri, Sami Faiz
URN	etd-04172003-091816
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-04172003-091816
Title	Analytical and experimental studies of impact dampers
Degree	PhD
Option	Engineering and Applied Science
Advisory Committee	Advisor Name Title Thomas Kirk Caughey Committee Chair Charles E. Crede Committee Member Donald E. Hudson Committee Member Ernest E. Sechler Committee Member William D. Iwan Committee Member
Keywords	None
Date of Defense	1965-05-11
Availability	unrestricted
Abstract A study is made of the general behavior of a single particle impact damper, with the main emphasis on symmetric 2 impacts/cycle motion. The exact solution for this case is derived analytically and its asymptotically stable regions are determined. The stability analysis defines the zones where the modulus of all the eigenvalues of a certain matrix relating conditions after each of two consecutive impacts is less than unity. Results of the analysis are supplemented and verified by experimental studies with a mechanical model and an analog computer. Additional numerical investigations are made with a digital computer. It is found that, under practically realizable conditions, impact damping is effective in reducing the vibration amplitude levels resulting from sinusoidal, random, or impulse-like excitation.
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