摘要
临界雷诺数区气动力特性是影响细长圆柱结构大幅振动的重要因素之一。该文通过刚性模型测压风洞试验,对临界雷诺数区光滑圆柱动态气动力分布特性及对临界区圆柱发生大幅振动的原因进行了分析。研究结果表明:圆柱在临界雷诺数区会发生大幅振动,当振动发生时,圆柱沿展向的气动力状态有一定的差异,这种气动力状态的差异说明气动力的非定常特性是引起大幅振动的主要原因。
The aerodynamic forces on a circular cylinder in the critical Reynolds number range significantly influence its large-amplitude vibrations.The wind pressure tests are carried out in the present study to clarify the relationship between the wind pressure distribution and large-amplitude vibrations for a smooth circular cylinder in the critical Reynolds number range.The results show that the large-amplitude vibrations occur in the critical Reynolds number range.Meanwhile,the aerodynamic forces along the length of the cylinder are different when the vibrations occur.This difference implies that the unsteadiness in a flow state is the main reason of the large-amplitude vibrations of a smooth circular cylinder.
作者
周佳豪
马文勇
黄伯城
ZHOU Jia-hao;MA Wen-yong;HUANG Bo-cheng(School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;Innovation Center for Wind Engineering and Wind Power Technology for Hebei Province, Shijiazhuang 050043, China;Wind Engineering Research Center, Shijiazhuang Tiedao University, Shijiazhuang 050043, China)
出处
《工程力学》
EI
CSCD
北大核心
2019年第B06期306-310,共5页
Engineering Mechanics
基金
河北省自然科学基金项目(E2017210107)
河北省教育厅重点项目(ZD2018063)
关键词
光滑圆柱
气动力
临界雷诺数区
大幅振动
风洞试验
circular cylinder
aerodynamic force
critical Reynolds number range
large-amplitude vibration
wind tunnel test
