飞行塔类游艺机预应力状态对风振影响  

Influence of Pre-stressed State of Flying Tower Amusement Device on Wind Vibration

作　　者：赵元文 陈朝阳 王跃勇 ZHAO Yuanwen;CHEN Zhaoyang;WANG Yueyong(Golden Horse Technology Entertainment Co.,Ltd.,Zhongshan,Guangdong 528437,China)

机构地区：[1]中山市金马科技娱乐设备股份有限公司

出　　处：《机电工程技术》2019年第11期234-237,共4页Mechanical & Electrical Engineering Technology

摘　　要：采用有限元计算方法分别计算飞行塔类游艺机在自重预应力状态下和无预应力状态下的前5阶模态和频率,通过比较这2种工况下模态和频率的差异,进而根据结构风力荷载计算标准分析比较2种状态下塔体风振系数的差异。结果表明重力作用产生的预应力状态对飞行塔类游艺机模态频率特性及风振的影响不可忽略。自重预应力状态通过影响结构的各阶固有频率,使塔体结构的风振系数降低,风力减少超过10%。对后续飞行塔类游艺机的风振效应评估提供定性经验。The finite element calculation method was used to calculate the first 5 modes and frequencies of the flying tower amusement machine under self-weight prestressed state and without prestressing state.By comparing the difference of mode and frequency under these two working conditions,according to the structural wind load calculation standard,the difference of the wind-induced vibration coefficient of the tower body under two states was analyzed and compared.The results show that the pre-stress state generated by gravity can not neglect the modal frequency characteristics and wind-induced vibration of the flying tower amusement machine.The self-weight pre-stress state reduces the wind-induced vibration coefficient of the tower structure by affecting the natural frequencies of the various structures,and the wind reduction is more than 10%.Qualitative experience is provided for the assessment of wind-induced effects of subsequent flight tower amusement machines.

关 键 词：飞行塔类 模态分析 有限元 重力预应力 

分 类 号：TS952[轻工技术与工程]