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Time-domain/ Frequency-domain Dynamic Analysis of Bridge Deck to Turbulent Wind : 변동풍속에 대한 교량데크의 시간영역/ 주파수영역 해석기법
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 김호경 | - |
dc.contributor.author | 최길호 | - |
dc.date.accessioned | 2017-07-14T04:20:25Z | - |
dc.date.available | 2017-07-14T04:20:25Z | - |
dc.date.issued | 2017-02 | - |
dc.identifier.other | 000000142193 | - |
dc.identifier.uri | https://hdl.handle.net/10371/124355 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 건설환경공학부, 2017. 2. 김호경. | - |
dc.description.abstract | ABSTRACT
Time-domain/frequency-domain dynamic analyses are performed for predicting the buffeting response of a bridge deck to turbulent wind. Rational Function Approximation (RFA), Fourier Series Approach (FSA), and Unified Approach are utilized to define self-excited forces in time-domain. The three different methodologies approximate the aerodynamic transfer functions between self-excited forces and responses of a bridge deck to eliminate frequency-dependent characteristics and satisfy causality condition. Aerodynamic admittance function without phase lag is considered to define buffeting force. General multi-mode analysis is conducted for frequency-domain analysis. Aforementioned dynamic analyses are applied to theoretical thin plate section with several incoming wind fluctuations. The predicted time histories of displacement and acceleration are nearly coincident among the three different approximation methods in time-domain. With respect to root mean square and peak value of the responses, the results of time-domain analysis and frequency-domain analysis are also almost identical. Application of the previously mentioned dynamic analyses to bluff section and comparison between the responses of numerical analysis and wind tunnel experiment will be addressed in a future publication. | - |
dc.description.tableofcontents | 1. Introduction 1
2. Time-domain/ Frequency-domain Dynamic Analysis 4 2.1 Equation of Motion. 4 2.1.1 Self-excited Force. 5 2.1.2 Buffeting Force. 7 2.2 Time-domain Dynamic Analysis. 9 2.2.1 Rational Function Approximation (RFA) . 10 2.2.2 Fourier Series Approach (FSA) 12 2.2.3 Unified Approach 13 2.3 Frequency-domain analysis (Strømmen 2010) 14 3. Application to Theoretical Thin Plate 18 3.1 Self-excited Force for Thin Plate 18 3.2 Buffeting Force for Thin Plate 20 3.3 Analysis Condition. 21 3.4 Analysis Result 22 3.4.1 Result of Approximation of Transfer Function 25 3.4.2 Time Histories of the Response. 27 3.4.3 Root Mean Square (RMS) and Peak Values 29 3.4.4 Response Spectrum. 36 4. Summary and Conclusion 40 REFERENCE 42 초록 44 | - |
dc.format | application/pdf | - |
dc.format.extent | 3098024 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Time-domain/Frequency-domain analysis | - |
dc.subject | Turbulent wind | - |
dc.subject | Buffeting response | - |
dc.subject | Unsteady aerodynamic force | - |
dc.subject | Flutter derivatives | - |
dc.subject | Aerodynamic admittance function | - |
dc.subject | Causality condition | - |
dc.subject | Bridge deck | - |
dc.subject.ddc | 624 | - |
dc.title | Time-domain/ Frequency-domain Dynamic Analysis of Bridge Deck to Turbulent Wind | - |
dc.title.alternative | 변동풍속에 대한 교량데크의 시간영역/ 주파수영역 해석기법 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Choi, Kilho | - |
dc.description.degree | Master | - |
dc.citation.pages | viii,45 | - |
dc.contributor.affiliation | 공과대학 건설환경공학부 | - |
dc.date.awarded | 2017-02 | - |
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