scholarly journals Seismic Simulation Analysis for 2-story Wooden Houses with Visco-Elastic Structural Control Devices

2015 ◽  
Vol 15 (7) ◽  
pp. 7_253-7_260
Author(s):  
Toichiro WATANABE ◽  
Toshiaki SATO ◽  
Takenori HIDA ◽  
Michio IGUCHI ◽  
Yuichi MASAKI ◽  
...  
Keyword(s):  
Structural Control ◽  
Simulation Analysis ◽  
Seismic Simulation ◽  
Control Devices

A Reliability Assessment Model for MR Damper Components within a Smart Structural Control Scheme

2008 ◽  
Vol 56 ◽  
pp. 218-224
Author(s):  
Maguid H.M. Hassan
Keyword(s):  
Structural Control ◽  
Inverse Dynamics ◽  
Mr Damper ◽  
Assessment Model ◽  
Resistance Force ◽  
Mr Dampers ◽  
Control Scheme ◽  
Smart Control ◽  
Control Devices ◽  
Magneto Rheological

Smart control devices have gained a wide interest in the seismic research community in recent years. Such interest is triggered by the fact that these devices are capable of adjusting their characteristics and/or properties in order to counter act adverse effects. Magneto-Rheological (MR) dampers have emerged as one of a range of promising smart control devices, being considered for seismic applications. However, the reliability of such devices, as a component within a smart structural control scheme, still pause a viable question. In this paper, the reliability of MR dampers, employed as devices within a smart structural control system, is investigated. An integrated smart control setup is proposed for that purpose. The system comprises a smart controller, which employs a single MR damper to improve the seismic response of a single-degree-of-freedom system. The smart controller, in addition to, a model of the MR damper, is utilized in estimating the damper resistance force available to the system. On the other hand, an inverse dynamics model is utilized in evaluating the required damper resistance force necessary to maintain a predefined displacement pattern. The required and supplied forces are, then, utilized in evaluating the reliability of the MR damper. This is the first in a series of studies that aim to explore the effect of other smart control techniques such as, neural networks and neuro fuzzy controllers, on the reliability of MR dampers.

Dynamic loading test and simulation analysis of full-scale semi-active hydraulic damper for structural control

2000 ◽  
Vol 29 (6) ◽  
pp. 789-812 ◽  
Author(s):  
Naoki Niwa ◽  
Takuji Kobori ◽  
Motoichi Takahashi ◽  
Hiroshi Midorikawa ◽  
Narito Kurata ◽  
...  
Keyword(s):  
Dynamic Loading ◽  
Structural Control ◽  
Simulation Analysis ◽  
Full Scale ◽  
Loading Test ◽  
Hydraulic Damper

scholarly journals Recent Advances in Bidirectional Modeling and Structural Control

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Satyam Paul ◽  
Wen Yu ◽  
Xiaoou Li
Keyword(s):  
Control Systems ◽  
Structural Control ◽  
Seismic Waves ◽  
Control Strategies ◽  
Optimal Placement ◽  
Modeling And Control ◽  
Control Devices ◽  
Identification Techniques ◽  
And Control ◽  
Bidirectional Modeling

This paper provides an overview of building structure modeling and control under bidirectional seismic waves. It focuses on different types of bidirectional control devices, control strategies, and bidirectional sensors used in structural control systems. This paper also highlights the various issues like system identification techniques, the time-delay in the system, estimation of velocity and position from acceleration signals, and optimal placement of the sensors and control devices. The importance of control devices and its applications to minimize bidirectional vibrations has been illustrated. Finally, the applications of structural control systems in real buildings and their performance have been reviewed.

Dynamic Mechanism Research and Seismic Simulation Experimentation on Superconducting Busbar of the ITER

2011 ◽  
Vol 141 ◽  
pp. 114-118
Author(s):  
Kai Song Wang ◽  
Yun Tao Song
Keyword(s):  
Simulation Analysis ◽  
Similarity Theory ◽  
Reaction Force ◽  
Amplitude Spectrum ◽  
Time History ◽  
Time History Analysis ◽  
Dynamic Mechanism ◽  
Response Curves ◽  
History Analysis ◽  
Seismic Simulation

To study the dynamic mechanism on ITER (International Thermonuclear Experimental Reactor) superconducting Busbar, the seismic response time-history analysis and seismic simulation experimentation had been done respectively. After choice of seismograms with seismic amplitude, spectrum, duration and ground conditions comprehensively, the structural response curves and response duration results of displacement, tensile stress, and reaction force under different directions actuating signals were obtained by using the time-history analysis. To test the accuracy of simulation analysis, the seismic simulation experimentation of the reduced experimental model of Busbar on the vibration table had been adopted with similitude ratios and conditions designing based-on the similarity theory. The accuracy of simulating analysis had been examined to satisfy the requirements of designed similitude ratios about displacement, acceleration and strain.

scholarly journals A simple hybrid testing approach for dynamic analysis of civil structural control devices

2009 ◽  
Vol 1 (4) ◽  
pp. 288
Author(s):  
J. Geoffrey Chase ◽  
Xiao Qi Chen ◽  
Kerry J. Mulligan ◽  
Geoffrey W. Rodgers ◽  
Rodney B. Elliott
Keyword(s):  
Dynamic Analysis ◽  
Structural Control ◽  
Hybrid Testing ◽  
Control Devices ◽  
Testing Approach

scholarly journals Analysis of the Effects of the Location of Passive Control Devices on the Platform of a Floating Wind Turbine

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2850
Author(s):  
Antonio Galán-Lavado ◽  
Matilde Santos
Keyword(s):  
Wind Turbine ◽  
Structural Control ◽  
Passive Control ◽  
Offshore Wind ◽  
Energy Devices ◽  
Hard Constraints ◽  
Marine Energy ◽  
Floating Offshore Wind Turbines ◽  
Control Devices ◽  
The Stability

Floating offshore wind turbines (FOWT) are subjected to strong loads, mainly due to wind and waves. These disturbances cause undesirable vibrations that affect the structure of these devices, increasing the fatigue and reducing its energy efficiency. Among others, a possible way to enhance the performance of these wind energy devices installed in deep waters is to combine them with other marine energy systems, which may, in addition, improve its stability. The purpose of this work is to analyze the effects that installing some devices on the platform of a barge-type wind turbine have on the vibrations of the structure. To do so, two passive control devices, TMD (Tuned Mass Damper), have been installed on the platform of the floating device, with different positions and orientations. TMDs are usually installed in the nacelle or in the tower, which imposes space, weight, and size hard constraints. An analysis has been carried out, using the FAST software model of the NREL-5MW FOWT. The results of the suppression rate of the tower top displacement and the platform pitch have been obtained for different locations of the structural control devices. They have been compared with the system without TMD. As a conclusion, it is possible to say that these passive devices can improve the stability of the FOWT and reduce the vibrations of the marine turbine. However, it is indispensable to carry out a previous analysis to find the optimal orientation and position of the TMDs on the platform.

Study on integrated response-based adaptive strategies for control and placement optimization of multiple magneto-rheological dampers-controlled structure under seismic excitations

2021 ◽  
pp. 107754632110004
Author(s):  
Zubair R Wani ◽  
Manzoor Tantray
Keyword(s):  
Structural Control ◽  
Control Algorithm ◽  
Control Strategies ◽  
Adaptive Strategies ◽  
Performance Criteria ◽  
Optimal Placement ◽  
Design Algorithm ◽  
Performance Objective ◽  
Control Devices ◽  
Magneto Rheological

The application and optimization of control systems with multiple magneto-rheological dampers integrated into a civil engineering structure is a challenging task. The performance of the control system is strongly linked with the location and arrangement of control devices, and the optimal placement of control devices is inherently linked with the performance objective of the control algorithm. Therefore, for semi-active control devices, the placement algorithm should be well rooted within the control algorithm, for effective structural control. This article proposes response-based adaptive control strategies embedded with the device location optimization algorithm. The acceleration and inter-story drift responses of the structure are considered as the performance objective for two separate control strategies. The flexibility of this approach lies in the fact that the design algorithm for control and location of magneto-rheological dampers can be engineered based on the performance criteria of the system. This study involves numerical simulation of an actual five-story framed structure. The simulation results indicated that the seismic performance of the structure is strongly linked with the number, placement of the magneto-rheological damper, and the performance objective of the control strategy used. Also, the configuration and corresponding control provided by the response-based adaptive strategies performed better than the configuration predicted by the benchmark genetic algorithm using the H2/LQG controller.

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