Passive, Nonlinear, Mechanical Structures for Seismic AttenuationSource: Journal of Computational and Nonlinear Dynamics:;2007:;volume( 002 ):;issue: 004::page 290Author:Riccardo DeSalvo
DOI: 10.1115/1.2754305Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Gravitational wave detectors aim to detect strain perturbations of space-time on the order of 10−21–10−22 at frequencies between 1Hz and a few kHz. This space-time strain, integrated over kilometer scale interferometers, will induce movements of suspended mirrors on the order of 10−18–10−19m. Seismic motion in this frequency band varies between 10−6m and 10−12m. Required seismic attenuation factors, as large as 10−12, by far exceed the performance of motion sensors, and are only obtained by means of a chain of passive attenuators. High quality springs in configurations yielding nonlinear response are used to generate attenuation at low frequency. Similarly, nonlinear mechanisms are used in the horizontal direction. A description of some of these systems and some of the technical challenges that they involve is presented.
keyword(s): Filters , Springs , Mechanisms AND Blades ,
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contributor author | Riccardo DeSalvo | |
date accessioned | 2017-05-09T00:22:54Z | |
date available | 2017-05-09T00:22:54Z | |
date copyright | October, 2007 | |
date issued | 2007 | |
identifier issn | 1555-1415 | |
identifier other | JCNDDM-25628#290_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/135308 | |
description abstract | Gravitational wave detectors aim to detect strain perturbations of space-time on the order of 10−21–10−22 at frequencies between 1Hz and a few kHz. This space-time strain, integrated over kilometer scale interferometers, will induce movements of suspended mirrors on the order of 10−18–10−19m. Seismic motion in this frequency band varies between 10−6m and 10−12m. Required seismic attenuation factors, as large as 10−12, by far exceed the performance of motion sensors, and are only obtained by means of a chain of passive attenuators. High quality springs in configurations yielding nonlinear response are used to generate attenuation at low frequency. Similarly, nonlinear mechanisms are used in the horizontal direction. A description of some of these systems and some of the technical challenges that they involve is presented. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Passive, Nonlinear, Mechanical Structures for Seismic Attenuation | |
type | Journal Paper | |
journal volume | 2 | |
journal issue | 4 | |
journal title | Journal of Computational and Nonlinear Dynamics | |
identifier doi | 10.1115/1.2754305 | |
journal fristpage | 290 | |
journal lastpage | 298 | |
identifier eissn | 1555-1423 | |
keywords | Filters | |
keywords | Springs | |
keywords | Mechanisms AND Blades | |
tree | Journal of Computational and Nonlinear Dynamics:;2007:;volume( 002 ):;issue: 004 | |
contenttype | Fulltext |