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jinri,yaboappshoujiban“guojiabaiqianwanrencaigongcheng”zhuanjialiuqingkuanjiaoshouyidiyizuozhehetongxunzuozhe,zaiguojixueshuqikanjournal of wind engineering & industrial aerodynamicsshangfabiaolunwen“study on the characteristics and mechanisms of the wind-induced vibration of micro-elliptical section stay cables”。gailunwenxitongfenxileweituoyuanjiemianxielasuofengzhizhendongtexingjizhendongjili。

目的:

jingguodiaoyanyutongji,dakuaduxielaqiaoxielasuozaigezhongyinsudezuoyongxiakeshideqijiemianxingzhuangbianweiweituoyuan。benyanjiutongguocelihecezhenfengdongshiyanduibifenxileweituoyuanxielasuoyubiaozhunyuanzhuxielasuodeqidonghezaiyufengzhizhendongtexing,yanjiuleleinuoshu、fenggongjiaohezhangduanzhouzhibiduifengzhizhendongtexingdeyingxiangguilv,bingduizhendongjilijinxingfenxi。

创新点:

zaibiaozhunyuanjiemianxielasuofengzhizhendongyanjiudejichushang,xitongyanjiulexielasuofengzhizhendongtexingyuleinuoshu、fenggongjiaohejiemianxingzhuangdeouheguanxi,dedaoleweituoyuanxielasuofashengdafufengzhizhendongdeleinuoshuyufenggongjiaoqujian。

结论:

(1)与标准圆柱斜拉索相比,微椭圆斜拉索在绝大多数风攻角下的振幅更大,最大甚至可以达到标准圆柱斜拉索的2.25倍,且发生振动的雷诺数范围更宽,开始发生振动的雷诺数更低。(2)微椭圆斜拉索风致振动主要发生在临界区及超临界区,对应雷诺数范围为Re=2.5×105~4.0×105,10°~30°。(3)基于准稳态假设的的预测方法对于预测临界状态下的斜拉索风致振动是无效的。

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