Search Results 1-14 of 14

  • TIME TEMPORAL TRANSITION OF CONCENTRATION UNDER THE CONDITION OF NON-STATIONARY GENERATION OF TRACER  [in Japanese]

    NAKAO Keisuke , KATO Shinsuke , TAKAHASHI Takeo

    … The experiment was done in the wind tunnel whose wind profile is similar to the urban wind environment. … As for the concentration fluctuation, the time development of the root mean square of concentration is also investigated. …

    Journal of Environmental Engineering (Transactions of AIJ) 77(680), 797-803, 2012

    J-STAGE 

  • 20054 Influence of Non-Stationary Wind Direction Fluctuation on Wind Pressure at Square Prism in Wind Tunnel with Multiple Fans : Part 3 Wind Pressure on Square Prism and Cylinder in Optimized Stream  [in Japanese]

    Terai Ryo , Kanda Jun

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-1, Structures I, Loads, reliability stress analyses foundation structures shell structures, space frames and membrane structures (2010), 107-108, 2010-07-20

    AIJ 

  • 20062 Influence of Non-Stationary Wind Direction Fluctuation on Wind Pressure at Square Prism in Wind Tunnel with Multiple Fans : Part 2 Wind Pressure at Square Prism under Wind Direction Fluctuation  [in Japanese]

    TERAI Ryo , ICHIHARA Yoshitaka , KANDA Jun

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-1, Structures I, Loads, reliability stress analyses foundation structures shell structures, space frames and membrane structures (2009), 123-124, 2009-07-20

    AIJ 

  • 20061 Influence of Non-Stationary Wind Direction Fluctuation on Wind Pressure at Square Prism in Wind Tunnel with Multiple Fans : Part 1 Wind Velocity and Direction Characteristics in Wind Tunnel with Multiple Fans  [in Japanese]

    ICHIHARA Yoshitaka , TERAI Ryo , KANDA Jun

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-1, Structures I, Loads, reliability stress analyses foundation structures shell structures, space frames and membrane structures (2009), 121-122, 2009-07-20

    AIJ 

  • Filed Measurement of Wind Pressure on Story-High Double Skins with Open Windows  [in Japanese]

    河井 宏允 , 西村 宏昭 , 鈴木 雅靖 [他] , 大浦 豊

    室内側のスキン(インナースキン)に自動換気装置と開閉可能な窓を持つ単層換気タイプの実大ダブルスキンファサード4体を組み込んだ模型を自然風中に設置し,アウタースキン,インナースキンに作用する風圧および室内圧を測定した。インナースキンに作用する風圧は位置にかかわらず一定で,その風圧は変動を含めてアウタースキンの上下の換気口の圧力の平均となる。室内圧の実測結果は,インナースキンの自動換気装置の開口による …

    京都大学防災研究所年報 (51), 465-479, 2007

    IR 

  • A wavelet-based method to simulate gust response of structure

    Kitagawa Tetsuya

    一般的に用いられている周波数領域におけるガスト応答解析法は,接近風の変動が定常ランダム過程であるとする理想的な仮定に基づいている.風速変動が非定常性を有する場合,この手法では最大応答振幅を予測できず,時間に関する情報を組込み可能な新たな解析法が必要となる.そこで本研究においては,ウェーブレットを用いて風速変動の時刻歴を時間帯とスケールごとに分解し,切り出された各風速変動に対する応答波形を個別に求め …

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan 55(0), 240-240, 2006

    J-STAGE 

  • A WAVELET-BASED SIMULATION ON GUST RESPONSES

    Kitagawa Tetsuya

    … Under approaching winds having non-stationary stochastic processes, the frequency domainanalysis on gust responses is not practical and it is impossible to predict the maximumamplitude of the gust responses of structures. … The time-scalecharacteristics present in wind fluctuations are configured with the system of the discretewavelets and are reflected to the time histories of the gust responses to be synthesized. …

    PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING 18(0), 000050-000050, 2005

    J-STAGE 

  • ANALYSIS OF THE UNSTEADY WIND DIRECTION IN NATURAL WINDS

    Ikeuchi Junko , Taniguchi Tetsuro , Maruyama Takashi , Taniike Yoshihito

    Wind direction changes all the time in natural winds. … Although many results of fieldmeasurements have pointed out that that wind pressures on claddings have been influencedby the change of wind direction, there are a number of unclarified points about it. … That isreason why the change of wind direction in natural wind has non-stationary condition. …

    PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING 18(0), 000047-000047, 2005

    J-STAGE 

  • A WAVELET-BASED SIMULATION OF GUST RESPONSE  [in Japanese]

    KITAGAWA Tetsuya

    土木学会論文集 = Proceedings of JSCE (759), 171-180, 2004-04-21

    References (20)

  • A WAVELET-BASED SIMULATION OF GUST RESPONSE  [in Japanese]

    北川 徹哉 , KITAGAWA Tetsuya

    … Under approaching winds possess non-stationary stochastic processes, the ordinary method of the gust response analysis in frequency domain is not practical and it is impossible to predict the maximum amplitude of the gust response of structures. … The time-scale characteristics present in wind fluctuations are configured with the system of the discrete wavelets and are reflected to the time histories of the gust responses to be synthesized. …

    土木学会論文集 759(I-67), 171-180, 2004-04

    IR 

  • A WAVELET-BASED SIMULATION OF GUST RESPONSE  [in Japanese]

    KITAGAWA Tetsuya

    従来の周波数領域におけるガスト応答解析法は, 接近風の変動が定常ランダム過程であるとする理想的な仮定に基づいている. 風速変動が非定常性を有する場合, この手法では最大応答振幅を予測できず, 時間に関する情報を組込み可能な新たな解析法が必要となる. そこで本研究においては, ウェーブレットを用いて風速変動の時刻歴を時間帯とスケールごとに分解し, 切り出された各風速変動に対する応答波形を個別に求めた …

    Doboku Gakkai Ronbunshu 2004(759), 171-180, 2004

    J-STAGE 

  • WAVELET COEFFICIENT ENTROPY OF NON-STATIONARY WIND FLUCTUATIONS  [in Japanese]

    KITAGAWA Tetsuya

    風工学シンポジウム論文集 17, 119-124, 2002-12-01

    References (6)

  • WAVELET COEFFICIENT ENTROPY OF NON-STATIONARY WIND FLUCTUATIONS

    Kitagawa Tetsuya

    … The non-stationary properties of wind velocity fluctuations were investigated with the information entropy of wavelet coefficients. … Many time histories of wind fluctuations were artificially generated and the gust response analyses in time domain were carried out using these data. …

    PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING Symp17(0), 21-21, 2002

    J-STAGE 

  • A Global Analysis of the Fluctuation of Total Ozone:II. Non-Stationary Annual Oscillation, Quasi-Biennial Oscillation, and Long-Term Variations in Total Ozone

    Hasebe Fumio

    1962年から.1976年までの月平均オゾン全量の変動が,第一部(長谷部,1980)で述べられた方法によって得られた経度一緯度から成る格子点値を用いて解析された。これらの値から,全球平均値,半球平均値,帯状平均値,北半球中緯度における子午線平均値が誤差の見積りとともに計算された。数値的フィルターの適用により,非定常一年周期振動(NSA),準二年周期振動(QBO),そして長周期変動(LTV)が考察さ …

    Journal of the Meteorological Society of Japan. Ser. II 58(2), 104-117, 1980

    J-STAGE 

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