Search Results 1-20 of 2159

  • 鋼構造2層純骨組小模型の振動台実験の地震波加振レベルの違いによる応答比較  [in Japanese]

    木曽 翔太 , 岩井 哲

    … In order to investigate the safety on response level of steel structures under dynamic excitation as an earthquake, simple one-story and two-story steel pure-frame structure models were tested using a shaking table controlled by acceleration input of seismic wave. … The elasto-plastic tri-linear restoring force-deformation curves were employed to compare the maximum load and the maximum story-displacement of the test behavior for each model. …

    広島工業大学紀要. 研究編 (42), 207-213, 39479-00-00

    IR 

  • Locating and Stabilizing Unstable Periodic Orbits Embedded in the Horseshoe Map

    Miino Yuu , Ito Daisuke , Ueta Tetsushi , Kawakami Hiroshi

    … On the other hand, the external force control (EFC) is known as an effective method to stabilize the UPPs. … In spite of the strong instability of UPPs, the controlled orbit is robust and the control input retains being tiny in magnitude. …

    International Journal of Bifurcation and Chaos 31(4), 2150110, 2021-03-30

    IR 

  • EFFECTS OF INPUT DIRECTION ON COLLAPSE MECHANISM AND STORY DRIFT FOR LOW AND MIDDLE-RISE STEEL MOMENT FRAMES  [in Japanese]

    HIROISHI Koji , ISHIDA Takanori , MASEKI Ryota , NARIHARA Hiroyuki , YAMADA Satoshi

    … <p> Many Low and Middle-rise steel moment frames are verified for seismic safety by horizontal load capacity calculation with push-over analysis assuming one-directional force. … However, under bi-directional input, the column strength decreases compared to the one-directional input because of bi-axial bending moment and additional axial force by over turning moment, and it becomes easy to form the weak column mechanism. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (781), 491-500, 2021-03

    J-STAGE  AIJ 

  • SEISMIC RESPONSE CHARACTERISTICS OF SEISMICALLY ISOLATED BUILDING WITH DEAD ZONE MECHANISM CONNECTED TO OIL DAMPER  [in Japanese]

    YACHIUNE Kazuo , SUZUKI Akira , SAITO Yuta , TOKUNO Masaki , KOBAYASHI Masahito

    … Meanwhile, the authors have proposed a dead zone mechanism that is an accessory device connected to the existing oil damper.</p><p> When the relative displacement of seismic isolation layer is smaller than the set amplitude (medium and small earthquakes level), the dead zone mechanism only slides and no damping force is generated in the oil damper, and when the amplitude is larger than the set amplitude (extreme ground motions), this mechanism generates damping force and suppresses excessive displacement. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (781), 381-391, 2021-03

    J-STAGE  AIJ 

  • Prediction accuracy of energy input to elastic-plastic SDOF models under fluctuating wind force  [in Japanese]

    銭 暁? , Qian Xiaoxin , 佐藤 大樹 , Sato Daiki

    日本建築学会関東支部研究報告集 (91), 361-364, 2021-03

    IR  AIJ 

  • ShearSheet: A Shear-force User Interface Using a Sheet Attachable to Capacitive Touch Panels  [in Japanese]

    藤田 和之 , 黄 梦婷 , 高嶋 和毅 , 土田 太一 , 真鍋 宏幸 , 北村 喜文

    スマートフォンやタブレット端末等の既存のタッチパネルに装着することで,タッチパネル面に対する剪断力の入力を可能にするユーザインタフェース「ShearSheet」を提案する.本インタフェースは,透明のアクリルシートをタッチパネル上でスライドさせられる機構を備え,このスライドによる変位量を,シートの特定箇所に貼付された導電性物体によりタッチ入力として認識させる.これにより,外部センサを用いずに,従来の …

    情報処理学会論文誌 62(2), 641-653, 2021-02-15

    IPSJ 

  • Development of an Onshore BenchTest System for a Wave Energy Converter and Verification of a Real-Time OptimalControl  [in Japanese]

    Taniguchi Tomoki , Fujiwara Toshifumi , Umeda Jun , Nimura Tadashi , Katayama Toru

    … <p>The onshore bench test system consisting of two linear shaft motors is produced to emulate the wave energy converter (WEC) motion in waves, control force, and power generation under different control strategies. … The measured motion of the test system, control force, and power generation are good agreement with the calculated ones in the simulated regular waves conditions. …

    Journal of the Japan Society of Naval Architects and Ocean Engineers 32(0), 99-108, 2021

    J-STAGE 

  • Development of Electromagnetic Guideway for Seamless Ultra-thin Steel Plate:(Consideration on Effect of Vibration Suppression against Input Vibration Disturbance by Multi Body Dynamics)  [in Japanese]

    Nakasuga R. , Narawa Y. , Ishihara S. , Yamaguchi R. , Ogawa K. , Narita T. , Kato H.

    … In this study, the attractive force was analyzed by changing the steady-state current applied to the electromagnets to investigate the vibration suppression performance of the electromagnets for the electromagnetic guideway. … From the analysis results, the electromagnets generated a restoring force like a spring. …

    Transaction of the Magnetics Society of Japan Special Issues, 2021

    J-STAGE 

  • A Study on Highly Efficient Dual-Input Power Amplifiers for Large PAPR Signals

    YAMAOKA Atsushi , HONE Thomas M. , EGASHIRA Yoshimasa , YAMAGUCHI Keiichi

    … At the same time, increased modulation order due to the evolution of cellular systems will force power amplifiers to operate at much larger output power back-off to prevent EVM degradation. …

    IEICE Transactions on Electronics, 2021

    J-STAGE 

  • Development of Noise Control System for Ultra-compact Mobility by Plate Vibration:(Fundamental Consideration on Performance of Giant Magnetostrictive Actuator)  [in Japanese]

    Kato T. , Kitamura T. , Maehara F. , Nakayama H. , Ikeda K. , Endo A. , Kato H. , Narita T.

    … However, the noise input into the vehicles mainly consists of road and wind noise from the tires and wind noise due to using an electric motor as a power source instead of a gasoline engine. … In this paper, we created an analysis model of the GMA and considered magnetostrictive force and the frequency characteristics of the proposed GMA by electromagnetic field analysis.</p> …

    Transaction of the Magnetics Society of Japan Special Issues, 2021

    J-STAGE 

  • Development of Multi Degrees-of-Freedom Haptic Forceps Robot with Three Actuated Fingers

    Matsunaga Takuya , Shimono Tomoyuki , Ohnishi Kouhei

    … Although driving force for the tip portion of a flexible forceps robot is mechanically transmitted by wires through the flexible portion, friction and backlash changed by the posture of the flexible portion make it difficult to realize precise end effector control. … Transmission of driving force in flexible structure that causes performance deterioration is eliminated by arranging motors near the end effector. …

    IEEJ Journal of Industry Applications 10(2), 247-253, 2021

    J-STAGE 

  • High-Precision Control for Functional Electrical Stimulation Utilizing a High-Resolution Encoder

    Sakaino Sho , Kitamura Tomoya , Mizukami Naoto , Tsuji Toshiaki

    … <p>In functional electrical stimulation, the time delay between an input voltage and the corresponding muscle force is a significant issue. … This enables the inclusion of a time delay in the high-order phase delay of the force/voltage relationship, which may lead to delay recovery using a suitable controller. …

    IEEJ Journal of Industry Applications 10(2), 124-133, 2021

    J-STAGE 

  • CRITICAL EARTHQUAKE RESPONSE OF WOODEN HOUSES MODELED BY SINGLE-DEGREE-OF-FREEDOM BILINEAR+SLIP SYSTEM SUBJECTED TO PULSE-LIKE GROUND MOTIONS  [in Japanese]

    NAKAYAMA Shota , KOJIMA Kotaro

    … The pulse-like ground motions with a predominant period of more than 1 second can damage two-story wooden houses, and many wooden houses were collapsed during Hyogoken-Nanbu earthquake in 1995.</p><p> Various types of models that can represent the load-deformation relation or restoring force-deformation characteristics of shear walls or mainframes in wooden houses have been proposed. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 86(780), 201-211, 2021

    J-STAGE 

  • A METHOD FOR ESTIMATING STATIC ELASTIC PILE-HEAD SPRING USING THE IMPULSE RESPONSE EXCITED BY HUMAN POWER  [in Japanese]

    NARITA Nobuhide , ONUMA Mitsuru , KAWAHATA Eiji , ABE Akio , ARAI Toshiaki , NUMOTO Haruki , SATO Takeshi , FUKUDA Takeshi , KOSAKA Hiroyuki , KUZE Naoya , TOBITA Yoshinori , KISHIMOTO Takeshi , OGAWA Atsushi , TOMITA Yusuke , UCHIDA Takahiko

    … Hit the pile-head with an impulse hammer to obtain the time series data of the input and response of the pile-head.</p><p> 3. … Pile-head spring we want is the reciprocal of the impulse response.</p><p> Dynamic model proposed to simulate pile-head response is a beam-on-Winkler-foundation considering its own inertial force. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 86(779), 65-75, 2021

    J-STAGE 

  • AMPLIFICATION FACTOR OF VERTICAL DISTRIBUTION OF SHEAR FORCE COEFFICIENT FOR SEISMICALLY ISOLATED BUILDINGS CORRESPONDING TO INPUT LEVEL OF DESIGN LONG-PERIOD AND LONG-DURATION GROUND MOTIONS  [in Japanese]

    KOBAYASHI Masahito , GODA Masataka

    … MLIT also announced the region divided by input level of LPGMs in the Kanto (KA1), Chukyo (CH1–3), Shizuoka (SZ1–3), and Osaka (OS1–3) areas. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (778), 1545-1553, 2020-12

    J-STAGE  AIJ 

  • EDM Parametric Study of Composite Materials: A Review

    Gupta Akash , Kumar Harish , Nagdeve Leeladhar , Pawan Kumar Arora

    … This paper outlines the findings of the investigational studies performed to explore the impact of the electrical discharge machining method and input variables on the properties of the output parameters. … EDM offers a minimal machining force with an appropriate tooling expense is a promising non-conventional machining method for machining Composites. …

    Evergreen 7(4), 519-529, 2020-12

    IR  DOI 

  • Estimating maximum responses and control force for equivalent input disturbance approach based active structural control

    宮本 皓 , Miyamoto Kou , 佐藤 大樹 , Sato Daiki , 陳 引力 , Chen Yinli , 余 錦華 , She Jinhua

    2020 17WCEE Proceedings, 2020-09

    IR 

  • AN EXPERIMENTAL STUDY ON DYNAMIC FLEXURAL BUCKLING FOR REINFORCED CONCRETE PILES IN LIQUEFIED SOIL USING CENTRIFUGE TESTS  [in Japanese]

    HAYASHI Kazuhiro , MIYACHI Yuichi , KIMURA Yoshihiro , TAMURA Shuji , SAITO Taiki

    … However, when the ground liquefies, the stiffening force for horizontal deformation of the pile weakens. … Three specimens with soil densities and input waves as variables were tested by uni-axial shaking. … Since concrete (mortar) is a non-linear material, the tangential stiffness changes according to the acting axial force. … Also, even if the ground liquefies, the stiffening force for horizontal deformation of the pile members does not become zero. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (773), 911-920, 2020-07

    J-STAGE  AIJ 

  • SHAKING TABLE TESTS AND THEIR SIMULATIONS BASED ON SURVEY ON COLLAPSED RESIDENTIAL RETAINING WALLS DURING THE 2016 KUMAMOTO EARTHQUAKE  [in Japanese]

    KADOTA Ryutaro , KAWASE Hiroshi , GOTOU Masami

    … The other reason is that the model wall was supported by the steel container due to the frictional force. … In the second experiment, even though the friction problem was solved, the model wall was not collapsed either, because of the smaller maximum input acceleration due to the capacity of the shaking table in KIT. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (771), 705-713, 2020-05

    J-STAGE  AIJ 

  • COLLAPSE MECHANISM AND DISPLACEMENT OF LOW AND MIDDLE-RISE STEEL MOMENT FRAMES UNDER HORIZONTAL BI-DIRECTIONAL GROUND MOTIONS  [in Japanese]

    HIROISHI Koji , ISHIDA Takanori , MASEKI Ryota , NARIHARA Hiroyuki , YAMADA Satoshi

    … <p> Low and middle-rise steel moment frames are generally verified for seismic safety by horizontal load capacity calculation with push-over analysis assuming one-directional force. … However, during an actual earthquake, the dynamic behavior and the horizontal bi-directional input may cause the building behavior different from the design assumption. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (771), 749-758, 2020-05

    J-STAGE  AIJ 

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