Analysis and optimization of a nonlinear dual‐mode floor isolation system subjected to earthquake excitations

2021 ◽  
Author(s):  
Puthynan Bin ◽  
Mohammad H. Tehrani ◽  
Mehrun Nisa ◽  
P. Scott Harvey ◽  
Alexandros A. Taflanidis
Keyword(s):  
Dual Mode ◽  
Isolation System ◽  
Floor Isolation

Robust design of a multi-floor isolation system

2018 ◽  
Vol 25 (4) ◽  
pp. e2130 ◽  
Author(s):  
Hamidreza Anajafi ◽  
Ricardo A. Medina
Keyword(s):  
Robust Design ◽  
Isolation System ◽  
Floor Isolation

LQR control with frequency-dependent scheduled gain for a semi-active floor isolation system

2013 ◽  
Vol 43 (9) ◽  
pp. 1265-1284 ◽  
Author(s):  
Yundong Shi ◽  
Tracy C. Becker ◽  
Sachi Furukawa ◽  
Eiji Sato ◽  
Masayoshi Nakashima
Keyword(s):  
Frequency Dependent ◽  
Isolation System ◽  
Lqr Control ◽  
Floor Isolation

435 Study on Floor Isolation System Using Coiled Spring

2006 ◽  
Vol 2006 (0) ◽  
pp. _435-1_-_435-6_
Author(s):  
Akihiro KINOSHITA ◽  
Satoshi FUJITA ◽  
Hiroshi KURABAYASHI ◽  
Tsuyoshi FUKASAWA ◽  
Toshio OMI
Keyword(s):  
Isolation System ◽  
Coiled Spring ◽  
Floor Isolation

Analysis about Isolation Floor Consisting of FPS System and Dish Spring

2012 ◽  
Vol 602-604 ◽  
pp. 1541-1545
Author(s):  
Nan Ge ◽  
Hai Bin Chen ◽  
Li Ting Yao
Keyword(s):  
Coupling Effect ◽  
Lagrange Equation ◽  
Vertical Direction ◽  
Vertical Vibration ◽  
Low Friction ◽  
Isolation System ◽  
Horizontal Vibration ◽  
Partial Domain ◽  
Floor Isolation ◽  
Low Stiffness

A theoretical analyzing approach about the compound floor isolation system consisting of FPS and dish spring is derived. It starts from the Lagrange equation, with the coupling effect of the horizontal vibration and vertical vibration being included. Computation results show that for the proper specifications the floor isolation system may exhibit good effectiveness in mitigating the acceleration of the unfixed objects or equipments in both horizontal and vertical direction, while the extra displacement could be limited to be in a manageable range. The expected parameters for mitigating the accelerations agree with that for displacements in a partial domain. The specification of a floor isolation system needs low friction coefficient on the slide 0.05<μ<0.1, a reasonable slide radius 0.5<μ<1.0m, a relatively low stiffness coefficient and relatively high damp coefficient of the dish spring.

Analysis about Efficiency of Floor Isolation System Consisting of RFPS System and Dish Spring

2012 ◽  
Vol 594-597 ◽  
pp. 2664-2667
Author(s):  
Nan Ge ◽  
Hai Bin Chen ◽  
Chun Yi Yu
Keyword(s):  
Friction Coefficient ◽  
Vertical Direction ◽  
Stiffness Coefficient ◽  
Low Friction ◽  
Isolation System ◽  
Partial Domain ◽  
Floor Isolation ◽  
Low Stiffness

A theoretical analyzing approach about the compound floor isolation system consisting of RFPS and dish spring is derived. Computation results show that for the proper specifications, the floor isolation system may exhibit good effectiveness in mitigating the acceleration of the unfixed objects or equipments in both horizontal and vertical direction, while the extra displacement could be limited to be in a manageable range. The expected parameters for mitigating the accelerations agree with that for displacements in a partial domain. The specification of a floor isolation system needs low friction coefficient on the slide 0.05<μ<0.1, a reasonable slide radius 0.6<μ<1.0m, a relatively low stiffness coefficient and relatively high damp coefficient of the dish spring.

103 Research and Development of Floor Isolation System Using Vertically Utilized Elasto-Plastic Coiled Springs

2007 ◽  
Vol 2007 (0) ◽  
pp. _103-1_-_103-6_
Author(s):  
Tsuyoshi FUKASAWA ◽  
Satoshi FUJITA ◽  
Toshio OMI ◽  
Hiroshi KURABAYASHI ◽  
Akihiro KINOSHITA
Keyword(s):  
Research And Development ◽  
Isolation System ◽  
Floor Isolation

H ∞ control in the frequency domain for a semi-active floor isolation system

2013 ◽  
Vol 7 (3) ◽  
pp. 264-275 ◽  
Author(s):  
Yundong Shi ◽  
Tracy C. Becker ◽  
Masahiro Kurata ◽  
Masayoshi Nakashima
Keyword(s):  
Frequency Domain ◽  
Isolation System ◽  
Floor Isolation
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