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非定常入力を受ける線型多自由度系の応答のスペクトル解析と航空機の突風応答への応用
https://jaxa.repo.nii.ac.jp/records/44813
https://jaxa.repo.nii.ac.jp/records/448130aad8758-2e91-48ae-aa75-b0f6daa5b8c3
名前 / ファイル | ライセンス | アクション |
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naltr00559.pdf (2.2 MB)
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Item type | テクニカルレポート / Technical Report(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
タイトル | 非定常入力を受ける線型多自由度系の応答のスペクトル解析と航空機の突風応答への応用 | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18gh | |||||
資源タイプ | technical report | |||||
その他のタイトル(英) | ||||||
その他のタイトル | Spectrum Analysis of the Response of Multi-Degree-of-Freedom Linear Systems under Nonstationary Input and its Application to Airplane Response in Atmospheric Turbulence | |||||
著者 |
藤森, 義典
× 藤森, 義典× FUJIMORI, Yoshinori |
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著者所属 | ||||||
航空宇宙技術研究所機体第二部 | ||||||
著者所属(英) | ||||||
en | ||||||
Second Airframe Division, National Aerospace Laboratory(NAL) | ||||||
出版者 | ||||||
出版者 | 航空宇宙技術研究所 | |||||
出版者(英) | ||||||
出版者 | National Aerospace Laboratory(NAL) | |||||
書誌情報 |
航空宇宙技術研究所報告 en : Technical Report of National Aerospace Laboratory TR-559 巻 559, p. 27, 発行日 1979-01 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 線型多自由度系への非定常入力を決定的包絡線関数と定常過程との積で表わし,系の応答のスペクトル解析を行った。結果を任意階数の変調スペクトルで表示した。これらはPriestleyによる定義,並びに定常解析を特別な場合として含むものである。応用例として航空機の突風応答解析をとり上げ,一般座標についての変位,速度,加速度応答と,それらを重ね合せた全応答を求める式を導いた。数値計算結果より得られた主な結論は,加速度応答が立上りで定常値より高い極大値をとるので従来の定常解析だけでは不十分であることである。 | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | An exploratory study was conducted to establish the spectrum representation of the response of the multi-degree-of-freedom linear system, under the nonstationary input which is characterized by a product of a deterministic function and a stationary random process. New spectrum expressions are derived to describe the cross spectrums of the output within an arbitrary order. The present result includes the definition by Priestley, as a special case, and has been reduced to the stationary spectrum when a deterministic function is set constant. In order to demonstrate feasibility of the nonstationary spectrum analysis the second order statistics, of the response of the model airplane under nonstationary atmospheric turbulence, are obtained in terms of the evolutionary cross spectrums of the generalized coordinates(displacement), their first derivatives(velocity) and their second derivatives(acceleration). It is shown that the total responses of these quantities, superposition of the various modes, can be computed at any positions of interest on the airplane wing. Some numerical examples are given to evaluate the relative contributions of rigid and flexible modes to the total responses. One main conclusion from this study is the fact that the present method is very useful in estimating the maximum mean square at the transient stage of the acceleration response, which has been overlooked by the conventional stationary analysis. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0389-4010 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: NALTR0559000 | |||||
レポート番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | レポート番号: NAL TR-559 |