基于风压谱和Hermite模型的大跨干煤棚风压场数值模拟研究  

Numerical simulation of wind pressure Field of long-span lattice structures based on wind pressure spectra and Hermite model

作　　者：黄铭枫[1] 孙轩涛 冯鹤[1] 楼文娟[1] 胡德军 HUANG Mingfeng;SUN Xuantao;FENG He;LOU Wenjuan1;HU Dejun(Institute of Structural Engineering,Zhejiang University,Hangzhou310058,China;Zhejiang Yaosha Group Company Limited,Hangzhou310011,China)

机构地区：[1]浙江大学结构工程研究所,杭州310058 [2]浙江耀厦控股集团有限公司,杭州310011

出　　处：《振动与冲击》2018年第23期111-119,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金资助(51578504; 51838012)

摘　　要：大跨干煤棚表面风荷载脉动特性较为复杂,通常需要风洞试验确定。基于四参数风压谱模型和Hermite变换关系,提出了大跨干煤棚随机风压场的数值模拟方法,对非高斯风压场进行高效模拟;同时在该方法中引入基于非高斯数字特征的误差控制参数,能够在给定精度要求的条件下修正模拟结果;利用某大跨开敞式干煤棚网架结构的刚性模型高频测压风洞试验数据,得到了大跨干煤棚表面各区域风压谱模型的四个参数,并采用该方法开展了大跨干煤棚非高斯风压场的数值模拟。通过数值模拟结果和风洞试验结果在时域和频域内的对比,验证了方法的有效性。The fluctuation of wind load on large-span lattice structures are complicated,usually need to be determined by wind tunnel tests.A new numerical simulation method for wind pressure fields of long-span lattice structures is proposed based on empirical wind pressure spectra and Hermite translation model.The proposed method is able to simulate the non-Gaussian wind pressure fields efficiently.The error control mechanism is carefully designed in the simulation method to effectively refine the simulation results with a calibration to the target non-Gaussian characteristics during the simulation process.The empirical wind pressure spectra are determined from the wind tunnel test results.Finally,the effectiveness and accuracy of the proposed method were demonstrated by comparing the numerical results of non-Gaussian wind pressure to the wind tunnel results both in time and frequency domains.

关 键 词：风压谱模型 非高斯风压场 数值模拟 风洞试验 

分 类 号：TU312.1[建筑科学—结构工程]