So far , a limited number of research papers are related to dynamic responses of long - span flexible roofs at home and abroad . so it is important to study on wind load and wind - induced dynamic response for long - span flexible roof structures in the field of engineering and research 目前国内外对大跨度柔性屋盖结构的竖向风振研究较少，因此深入研究大跨度柔性屋盖结构的风荷载及风振响应具有极其重要的工程应用价值和学术研究意义。
Based on the analytical model of the generalized force spectra of the first mode of typical lattice towers in along - wind direction , simplified empirical formulae to evaluate along - wind dynamic responses of lattice towers under wind load are proposed in this paper 摘要基于格构式塔架顺风向一阶广义荷载谱解析模型，提出了格构式塔架顺风向风振响应简化计算公式，这些简化公式将求格构式塔架顺风向风振响应的复杂积分变为简便的代数运算。
Diagnostic results show that the westerly wind stress anomaly and convergent meridional wind stress anomaly over the tropical pacific correspond to the every el nino , and the easterly anomaly and divergent meridional wind stress anomaly correspond to the vanishing of el nino 通过研究表明，每次elnino事件在热带太平洋都伴随着西风应力异常以及向赤道辐合的经向风应力异常，东风应力异常及向两极辐散的经向风应力异常与elnino消亡对应。
Moreover , as for average state , the crucial areas of wind stress acting on the two kinds of el nino exist different sites , and the zonal wind stress play a important role on eastern el nino models , the meridional wind stress , however , play a significant effect on the middle el nino models 此外，平均而言，风应力场对两类elnino作用的关键区也有所不同，而且纬向风应力对东部型elnino有重要作用，经向风应力对中部型elnino的产生则起着至关重要的作用。
When the zonal wind of 10hpa is apheliotes ( zephyrus ) and that of 70hpa is zephyrus ( apheliotes ) , the transition delays ( advances ) . the correlation between the ozone quantity and the transition dates in middle stratosphere is opposite . when the ozone quantity is excessive ( lack ) , the transition advances ( delays ) 分析发现10hpa及70hpa层的热带纬向风与相应层环流转型日期之间的相关显著， 10hpa热带东(西)风位相、 70hpa西(东)风位相时环流转型滞后(提早) 。
In this paper , a simplified method of calculating wind - induced response and design loads of super - high - rise buildings was proposed . coherence properties of wind load on typical tall building were analyzed and the results show that cross - wind loads at different height have strong coherence at vertex shedding frequency , and the coherence function ' s value here is near to 1 首先分析了各测点层合力的相干特性，结果显示各测点层所受顺风向风荷载之间的相干函数基本成单调衰减规律，而横风向脉动风荷载在漩涡脱落频率处存在和顺风向不同的显著相关性。
The well correlation times persist for about six months and the incidence level is reach or pass 0 . 01 . the meridional wind field which persistly impacting on sst in kuroshio region is near the west tropical pacafic . the result also behave as distinctly positive correlativity . afterwards we investigate the relationship between sst in kuroshio region and ninoc , 4 region and integrate the front conclusion . as a resultjt display that the sst in kuroshio region persists for positive relevance during the course of el - nino and inversely during the course of la - nina . subsequentl y the synthetic fields of kuroshio region ' s ssta in el - nino and la - nina years have proved the front outcome 对与黑潮海温异常变化关系密切的风场关键区及两者的相互关系研究表明：黑潮本身的风场和其源地北赤道流海域的风场异常对黑潮海温的影响仅限于同期及海温滞后1到2个月，而能持续影响黑潮海温异常的经向风场的关键区出现在赤道西太平洋( 140 - 160e ， 5s - 5n ) ，纬向的关键区则在赤道中太平洋( 160e - 150w ， 5s - 5n ) ，且纬向关键区的强度和范围均大于经向，两者对黑潮海温的影响均能持续六个月左右。
( 4 ) latitude and meridional wind stress fields both have the character of quasi - quadrennial and quasi - biennial oscillation , but their phases are different . so their conjunct effect makes enso oscillation have both quasi - quadrennial and quasi - biennial periodicity and erratic , which causes the forecast of enso events uncertainty ( 4 )纬向和经向风应力距平场具有准4a和准2a的振荡性质，但是位相存在差异，因此共同作用下造成enso振荡既有准4a和准2a的周期性，又有不规则性，对于enso事件的预报带来不确定性。
So far , a limited number of research papers are related to dynamic responses of long - span flexible roofs . long - span grid roof is a special topic of long - span flexible roof structures , and it is important to study on wind load and wind - induced dynamic response in the field of engineering and research 目前国内外对大跨度柔性屋盖结构的竖向风振研究很少，本文研究的体育场大跨网架屋盖结构的风荷载及风振响应作为大跨度柔性屋盖结构的一个专题，具有重要的工程应用价值和学术研究意义。
Meanwhile , numerical computation of aerodynamics is widely applied with the progress of computer , large quantities of relative paper has been presented . but at present , the relative literature about turbulence characteristics of plural vehicles running in row and passing maneuvers is very limited . pointing to the above difficulty , in this paper , numerical computation of turbulent - velocity field is studied while a sedan exceeding a tractor - trailer truck 本论文在对某国产轿车单车外流场的模拟地面边界层、车轮转动和侧向风载荷研究基础上,以及两辆轿车并列行驶、同向超车的稳态研究的基础上,选取了两种笛卡尔网格方案和四面体混合网格方案,开展某国产轿车超过某大型运输车的数值模拟研究。
