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An electric analog type response spectrum analyzer for earthquake excitation studies

Caughey, Thomas Kirk and Hudson, Donald E. (1954) An electric analog type response spectrum analyzer for earthquake excitation studies. California Institute of Technology . (Unpublished) http://resolver.caltech.edu/CaltechEERL:1954.EERL.1954.002

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Abstract

The design of a response spectrum analyzer for earthquake excitation studies is described. Electric analog techniques are used, with a series inductance, capacitance, and resistance circuit forming a direct analog to the mechanical structure. The circuit arrangement permits a determination of system response for a sequence of periods at constant damping. Provision is made for obtaining zero damping in the circuit. An arbitrary function generator of the variable width film photoelectric cell type is described. The results obtained with the function generator- spectrum analyzer system for a half-sine wave pulse are compared with the mathematically obtained exact answers for the zero damping case, and the accuracy of the system is shown to be satisfactory.


Item Type:Report or Paper (Technical Report)
Group:Earthquake Engineering Research Laboratory
Record Number:CaltechEERL:1954.EERL.1954.002
Persistent URL:http://resolver.caltech.edu/CaltechEERL:1954.EERL.1954.002
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:26478
Collection:CaltechEERL
Deposited By: Imported from CaltechEERL
Deposited On:19 Feb 2008
Last Modified:26 Dec 2012 13:58

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