發(fā)布時(shí)間：2018-07-12 11:23

  本文選題：風(fēng)場(chǎng)模擬 + 大跨度橋梁　； 參考：《振動(dòng)與沖擊》2017年07期

【摘要】：為減少諧波合成法中功率譜矩陣分解的計(jì)算量,基于雙索引頻率和譜矩陣特點(diǎn),提出了譜解矩陣雙軸插值算法和遞歸插值算法。兩種方法均使風(fēng)場(chǎng)模擬計(jì)算效率大幅度提高,且得到的模擬風(fēng)場(chǎng)均與傳統(tǒng)諧波合成法在統(tǒng)計(jì)意義上相符;研究了插值節(jié)點(diǎn)數(shù)量及分布形式對(duì)風(fēng)場(chǎng)模擬的影響,認(rèn)為在譜解矩陣的頻率軸向采取前密后疏分段插值,雙索引頻率軸向采用均勻分布插值節(jié)點(diǎn)的形式,更適合于風(fēng)場(chǎng)模擬。通過(guò)對(duì)一實(shí)際大跨度橋梁風(fēng)場(chǎng)的模擬,驗(yàn)證了方法的有效性。
[Abstract]:In order to reduce the computational complexity of power spectral matrix decomposition in harmonic synthesis, biaxial interpolation algorithm and recursive interpolation algorithm for spectral solution matrix are proposed based on the characteristics of double index frequency and spectral matrix. Both methods greatly improve the efficiency of wind field simulation, and the simulated wind field is statistically consistent with the traditional harmonic synthesis method, and the influence of the number and distribution of interpolated nodes on wind field simulation is studied. It is considered that the frequency axial interpolation of spectral solution matrix is more suitable for wind field simulation, and the double index frequency axial direction adopts the form of uniform distribution interpolation node, which is more suitable for wind field simulation. The effectiveness of the method is verified by simulating the wind field of a large span bridge.
【作者單位】： 湖南大學(xué)土木工程學(xué)院;湖南大學(xué)風(fēng)工程與橋梁工程湖南省重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2015CB057701;2015CB057702) 國(guó)家自然科學(xué)基金(51278191) 湖南省高校創(chuàng)新平臺(tái)開放基金(13K016)
【分類號(hào)】：U441.3

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1 郝麗;基于移動(dòng)設(shè)備的路況估計(jì)算法研究[D];北京郵電大學(xué);2014年

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