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Created page with "* '''Natural frequency range:''' 0.17 – 2.5 Hz * '''Vertical Motion Isolation:''' It uses a conventional spring connected to a Negative Stiffness Isolator (NSI) consisting o..."
* '''Natural frequency range:''' 0.17 – 2.5 Hz
* '''Vertical Motion Isolation:'''
It uses a conventional spring connected to a Negative Stiffness Isolator (NSI) consisting of two bars hinged at the center. The stiffness of the isolator is K=KS-KN where KS is the spring stiffness and KN is the magnitude of a negative-stiffness which is a function of the length of the bars and the load P.
[[File:NSIV.png|frame|center]]
* '''Horizontal Motion Isolation:'''
The beam-columns have horizontal stiffness Ks with the weight load applied laterally. Due to this the lateral bending stiffness is reduced by the "beam-column" effect. This behavior is equivalent to a horizontal spring combined with an NSI so that the horizontal stiffness is K=Ks-Kn, and Kn is the magnitude of the beam-column effect.
[[File:NSIH.png|frame|center]]
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If you are done reading this page, you can go back to [[Transportation#Types of PVI Systems|Types of PVI Systems]]
* '''Vertical Motion Isolation:'''
It uses a conventional spring connected to a Negative Stiffness Isolator (NSI) consisting of two bars hinged at the center. The stiffness of the isolator is K=KS-KN where KS is the spring stiffness and KN is the magnitude of a negative-stiffness which is a function of the length of the bars and the load P.
[[File:NSIV.png|frame|center]]
* '''Horizontal Motion Isolation:'''
The beam-columns have horizontal stiffness Ks with the weight load applied laterally. Due to this the lateral bending stiffness is reduced by the "beam-column" effect. This behavior is equivalent to a horizontal spring combined with an NSI so that the horizontal stiffness is K=Ks-Kn, and Kn is the magnitude of the beam-column effect.
[[File:NSIH.png|frame|center]]
----
If you are done reading this page, you can go back to [[Transportation#Types of PVI Systems|Types of PVI Systems]]