臺(tái)風(fēng)是世界上最具毀滅性的自然災(zāi)害之一。每年臺(tái)風(fēng)的發(fā)生都會(huì)造成巨大的經(jīng)濟(jì)損失和嚴(yán)重的人員傷亡事故。因此,分析在臺(tái)風(fēng)影響區(qū),作用在風(fēng)敏感結(jié)構(gòu)（高層建筑、大跨結(jié)構(gòu)等）上的脈動(dòng)風(fēng)荷載特性是非常重要的。脈動(dòng)風(fēng)的相干結(jié)構(gòu)是風(fēng)荷載計(jì)算中一個(gè)重要的中間參數(shù),是準(zhǔn)確估算風(fēng)荷載和風(fēng)振響應(yīng)的關(guān)鍵因素。本文將基于近地面臺(tái)風(fēng)場的實(shí)測數(shù)據(jù)的建立脈動(dòng)風(fēng)的相干結(jié)構(gòu),系統(tǒng)分析相干結(jié)構(gòu)的特征及其對湍流間歇性、高斯特性、峰值因子和陣風(fēng)因子的影響。風(fēng)速實(shí)測數(shù)據(jù)基于以下準(zhǔn)則篩選。首先,基于《中國地面氣象觀測規(guī)范》對風(fēng)速計(jì)進(jìn)行校準(zhǔn);其次,若出現(xiàn)監(jiān)測儀器故障或者電壓不平衡的情況,摒棄該段所得的風(fēng)速數(shù)據(jù);然后,基于可移動(dòng)的風(fēng)速觀測系統(tǒng),獲得了臺(tái)風(fēng)和常態(tài)風(fēng)工況下的部分監(jiān)測數(shù)據(jù),并分別對臺(tái)風(fēng)和常態(tài)風(fēng)工況下,脈動(dòng)特性進(jìn)行比較分析�；谂_(tái)風(fēng)“黑格比”及良態(tài)風(fēng)實(shí)測數(shù)據(jù),提取了湍流相干結(jié)構(gòu),并分析了其主要變化特征對湍流特性的影響。采用離散小波變換方法,研究了多尺度相干結(jié)構(gòu)對湍流特性的影響。通過分析湍流相干結(jié)構(gòu)的特點(diǎn),本文提出了一種小波系數(shù)譜分析方法,該方法結(jié)合了連續(xù)小波大尺度分辨率較高和AR模型（自回歸模型）譜估計(jì)頻率分辨率較高的特點(diǎn),得到了相... 

【文章來源】：哈爾濱工業(yè)大學(xué)黑龍江省 211工程院校 985工程院校

【文章頁數(shù)】：94 頁

【學(xué)位級別】：碩士

【文章目錄】：
Acknowlegements
摘要
Abstract
Chapter 1 Introduction
    1.1 Project origin and the purpose and significance of the study
        1.1.1 Project sources
        1.1.2 The purpose and significance of the study
    1.2 Research study and analysis
        1.2.1 Site measurement of Typhoon wind field
        1.2.2 Characteristics of turbulent coherent structures
        1.2.3 Evolutionary spectra estimation using wavelets
    1.3 The main contents
Chapter 2 Turbulence characteristics and field measurement
    2.1 Introduction
    2.2 Optimization of observation system
    2.3 Measuring Normal wind and typhoons near the earth and analysis their fluctuating characteristic
        2.3.1 Introduction of observation site
        2.3.2 Typhoon Hagupit
    2.4 Characteristic analysis of Hagupit typhoons and normal wind
        2.4.1 Quality control and data processing of measured data
        2.4.2 Hagupit Typhoons and normal wind average characteristic analysis
        2.4.3 Analysis of fluctuating wind characteristics of hagupit typhoon andnormal wind
    2.5 The Chapter Summary
Chpater 3 Analysis of characteristics of turbulent coherence structure
    3.1 Introduction
    3.2 Extraction of turbulent coherent structures
        3.2.1 Coherent structures of turbulence theory and method
        3.2.2 Extraction of multi-scale coherence structures using discrete Wavelet transform
        3.2.3 Coherent structure extraction method (DWT )
        3.2.4 Results of Discrete wavelet Transform
    3.3 Analysis of characteristics of turbulent coherent structures
        3.3.1 Using continuous Wavelet transforms method to extract the coherent structure
        3.3.2 Coherent structure in normal air extraction
        3.3.3 Typhoon hagupit coherent structure extraction results
        3.3.4 Spectral analysis principle of wavelet coefficients
        3.3.5 Characteristic analysis of coherent structure
    3.4 Analysis of influence of turbulent coherent structures
        3.4.1 Effect of correlation coefficient
        3.4.2 Influence on the turbulent intermittence
        3.4.3 Effect on turbulent Gauss
        3.4.4 Peak gust factor and impact factor
    3.5 The chapter summary
Chapter4 Straightforward approach based in discrete wavelet transform for estimating the evolutionary power spectral density of nonstationary winds
    4.1 Introduction
    4.2 Discrete wavelet transform
    4.3 Family of Daubechies Mother wavelet functions
    4.4 Field measurements and speed characteristics of winds produced by typhoon hagupit
    4.5 Methodology for estimating the evolutionary power density of anonstationary random process
    4.6 Results and discussion
    4.7 The chapter summary
Concluding remarks
References



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