244 FEM Response Analysis for an Elastic Body with Nonlinear Complex Springs Connected in Series : Impact Response for a Living Body Protected by Shock Absorbers

2012 ◽  
Vol 2012 (0) ◽  
pp. _244-1_-_244-10_
Author(s):  
Takao YAMAGUCHI ◽  
Norihisa TOMITA ◽  
Yusaku FUJII ◽  
Toru FUKUSHIMA ◽  
Akihiro TAKITA
Keyword(s):  
Elastic Body ◽  
Impact Response ◽  
Response Analysis ◽  
Living Body ◽  
Shock Absorbers ◽  
In Series

A Development of the Visco-Elastic Damper for Timber Structure and a Suggestion of the Technological Design Assistance System

2013 ◽  
Vol 778 ◽  
pp. 714-721
Author(s):  
Katsuhiko Kohara ◽  
Takeshi Nomura ◽  
Kazuyoshi Koumoto
Keyword(s):  
Seismic Response ◽  
Elastic Body ◽  
Structural Model ◽  
Time History ◽  
Timber Structure ◽  
Response Analysis ◽  
Frame Design ◽  
Timber Frame ◽  
Loading Tests ◽  
Controlled Structure

Our research team developed a brace type and an angle brace type of the visco-elastic damper on seismic-response controlled structure for timber structure. We performed various dependence evaluations by the materials examination of the styrene olefin-based visco-elastic body which we developed newly. We made a structural model using the performance that loading tests in timber frame. We inspected the validity of the structural model. In addition, we built a technical support system for damper setting by the time history response analysis so that a general design architect was easy to use the damper. We could express dynamics properties of visco-elastic body properties by Voigt model, and the structural model almost accorded with an examination property value. We made a structural model of the whole frame system by Kb of installation rigidity obtained from loading tests in timber frame. Because a design level almost accorded with experimental value, the validity of the frame design on seismic-response controlled structure in consideration of the dependence (distortion, frequency, temperature) of the visco-elastic body was confirmed. This visco-elastic damper on seismic-response controlled structure acquired minister authorization of Ministry of Land, Infrastructure and Transport. In addition, this damper acquired the certification of the Japan Building Disaster Prevention Association.

Impact Response Analysis of a Coaxial Double-Pipe Structure by Using Spectral Element Method

2011 ◽  
Author(s):  
Akemi Nishida ◽  
Kazuhiko Iigaki
Keyword(s):  
High Frequency ◽  
Spectral Element Method ◽  
Spectral Element ◽  
Impact Response ◽  
Response Analysis ◽  
Damping Properties ◽  
High Frequency Region ◽  
Parametric Studies ◽  
Double Pipe ◽  
Element Method

A coaxial double-pipe structure is to be used in the primary and auxiliary coolant system of a high-temperature gas-cooled reactor. In order to study the vibration characteristics of the coaxial double-pipe structure, hammering experiments were performed using specimens of the structure. Because the structural responses obtained in the experiments contained high-frequency components, impact response analysis was performed by using the spectral element method, which has high accuracy in the high-frequency region. A comparison between analysis results and experiment results showed good agreement between them. We also performed parametric studies on the damping properties of the specimens. The damping properties determined from the experiment results indicated that the inner and outer pipes had different damping properties.

Impact response analysis including biological reactions when a moving levitating block collides with palms of hands

2018 ◽  
Vol 2018.31 (0) ◽  
pp. 116
Author(s):  
Takao YAMAGUCHI ◽  
Yuji SHIMOKOBE ◽  
Yusaku FUJI ◽  
Shinichi MARUYAMA ◽  
Taro KOIZUMI
Keyword(s):  
Impact Response ◽  
Response Analysis

scholarly journals Comparison of ICEPEL Predictions With Single-Elbow Flexible Piping System Experiment

1979 ◽  
Vol 101 (2) ◽  
pp. 142-148 ◽  
Author(s):  
M. T. A-Moneim ◽  
Y. W. Chang
Keyword(s):  
Stainless Steel ◽  
Circumferential Strain ◽  
Structural Response ◽  
Response Analysis ◽  
Piping System ◽  
System Experiment ◽  
Stainless Steel Pipe ◽  
Piping Systems ◽  
In Series ◽  
Nickel 200

The ICEPEL Code for coupled hydrodynamic-structural response analysis of piping systems is used to analyze an experiment on the response of flexible piping systems to internal pressure pulses. The piping system consisted of two flexible Nickel-200 pipes connected in series through a 90-deg thick-walled stainless steel elbow. A tailored pressure pulse generated by a calibrated pulse gun is stabilized in a long thick-walled stainless steel pipe leading to the flexible piping system which ended with a heavy blind flange. The analytical results of pressure and circumferential strain histories are discussed and compared against the experimental data obtained by SRI International.

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