全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

近地面脉动风速时程的分形模拟研究

DOI: 10.13197/j.eeev.2015.04.121.wuhh.014, PP. 121-129

Keywords: 脉动风速,近地面,Weierstrass-Mandelbrot函数,分形,模拟

Full-Text   Cite this paper   Add to My Lib

Abstract:

风荷载是不可忽略的结构设计参数,而风荷载大小是由风速决定的,所以风速时程的模拟非常重要。本文根据实测的近地面脉动风速时程,计算了其分形盒维数,进而采用具有分形特性的随机函数模拟了脉动风速时程。然后,提出了考虑空间相关性的脉动风速时程分形模拟方法,并将模拟结果与实测脉动风速进行了分形盒维数、概率分布、功率谱和互相关系数的对比,发现两者很相似。本文所提出的近地面脉动风速时程的分形模拟方法弥补了传统模拟方法的不足。

References

[1]  Roger J Pinnington. A particle-envelope surface model for road-tyre interaction. International[J]. Journal of Solids and Structures, 2012, 49(3-4): 546-555.
[2]  钟莉, 李杰. 风速时程的分形特征分析[J]. 华中科技大学学报, 2008, 25(4): 273-275. ZHONG Li, LI Jie. Fractal characteristic analysis of wind speed time history[J]. Journal of HUST, 2008, 25(4): 273-275.(in Chinese)
[3]  刘磊, 胡非, 李军, 等. 基于Weierstrass-Mandelbrot函数的分形风速脉动仿真[J]. 气候与环境研究, 2013, 18(1): 43-50. LIU Lei, HU Fei, LI Jun, et al. On the use of weierstrass-mandelbrot function to simulate fractal wind fluctuations[J].Climatic and Environmental Research(in Chinese), 2013. 18(1): 43-50.(in Chinese)
[4]  Mandelbrot B B.Interm ittent turbulence in self-similar cascades divergence of high moments and dimension of the carrier[J]. Journal of Fluid Mech, 1974, 62: 331-358.
[5]  Frisch U. Turbulence: the Legacy of A. N. Kolmogorov[M]. Cambridge: Cambridge University Press, 1995: 312.
[6]  West B J, Shlesinger M.The noise in natural phenomena[J]. American Scientist, 1990, 78(1): 40-45.
[7]  Feder J. Fractals[M]. New York: Plenum, 1988, 149-162
[8]  赵臣, 张小刚, 吕伟平. 具有空间相关性风场的计算机模拟[J]. 空间结构, 1996, 2(2): 21-25. ZHAO Chen, ZHANG Xiaogang, LV Weiping. Computer modeling on wind histories with spatial correlativity[J]. Space Structure, 1996, 2(2): 21-25.(in Chinese)
[9]  刘学利, 王肇民. 高耸结构空间相关风场的模拟研究[J]. 建筑结构, 2000, 20(4): 45-47. LIU Xueli, WANG Zhaomin. Simulation study on the related wind field space of high-rise structure[J]. Building Structure, 2000, 20(4): 45-47.(in Chinese)
[10]  张希黔, 葛勇, 严春风, 等. 脉动风场模拟技术的研究与进展[J].地震工程与工程振动, 2008, 28(6): 206-212. ZHANG Xiqian, GE Yong, YAN Chunfeng, et al. Advances in research of simulation technology of fluctuation wind loading[J]. Earthquake Engineering and Engineering Dynamics, 2008, 28(6): 206-212.(in Chinese)
[11]  Mandelbrot B B. The fractal geometry of nature. Rev. ed. of "Fractals", 1977[J].San Francisco: W. H. Freeman and Company, 1982: 461.
[12]  Lovejoy S, Schertzer D. Scale Invariance, symmetries, fractals and stochastic simulations of atmospheric phenomena[J]. Bulletin American Meteorological Society, 1986, 67(1): 21-32.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133