摘要
针对传统减振支撑难以解决核电机组中小支管的无规则振动问题,设计了一种基于金属橡胶材料的环形二重三向动力吸振器,其中质量块总质量为0.084 kg,矩形弹簧和金属橡胶固定在质量块与工装夹具之间。首先,构建二重动力吸振器动力学模型。其次,利用质量感应法确定小支管的等效质量,并结合定点理论优化吸振器刚度、阻尼比。最后,对小支管二重动力吸振器系统进行谐响应仿真分析。仿真结果表明:二重动力吸振器对X、Y、Z 3个方向的吸振效果均大于95%。分别对有无安装二重动力吸振器的小支管进行激振试验,正弦激励幅值为5 N,频率为0~150 Hz。数据表明,二重动力吸振器对于小支管主要振动方向Y、Z吸振效果达到95%以上,X方向的吸振效率达到75%以上。
In view of the fact that it was difficult to solve the problem of irregular vibration of small and mediumsized branch pipes in nuclear power units with traditional vibration damping supports,a circular double three-way dynamic vibration absorber based on metal rubber material was designed in this study,with total mass of 0.084 kg,and the rectangular spring and metal rubber were fixed between the mass and the tooling fixture.Firstly,the dynamic model of the double dynamic vibration absorber was constructed,and then the equivalent mass of the small branch was determined by the mass induction method,and the stiffness and damping ratio of the vibration absorber were optimized by combining the fixed-point theory.The harmonic response simulation analysis of the small branch tube double dynamic vibration absorber system showed that the vibration absorption effect of the double dynamic vibration absorber in the X,Y and Z directions was greater than 95%.The excitation test was carried out on the small branch tube with or without the double dynamic vibration absorber,the sinusoidal excitation amplitude was 5 N,and the frequency range was 0 to 150 Hz,and the data showed that the vibration absorption effect of the double dynamic vibration absorber for the main vibration direction of the small branch tube Y and Z reached more than 95%,and the vibration absorption efficiency in the X direction reached more than 75%.
作者
白鸿柏
陈毅鹏
任志英
李振
何明圆
BAI Hongbai;CHEN Yipeng;REN Zhiying;LI Zhen;HE Mingyuan(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116,China;China National Nuclear Corporation Fujian Fuqing Nuclear Power Co.,Ltd.,Fuzhou 350318,China)
出处
《郑州大学学报（工学版）》
CAS
北大核心
2024年第5期37-44,共8页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(52175162,51805086)
NSAF联合基金资助项目(U2330202)。
关键词
核电小支管
二重动力吸振器
频率可调
三向吸振
宽频吸振
nuclear power small branch tube
double dynamic vibration absorber
frequency adjustable
three-way vibration absorption
broadband vibration absorb
