摘要
利用有限元法,以某平头塔机为研究对象,分析了其动态特性。通过分析得出如下结论:塔机的前六阶固有频率值分别为:0.131、0.190、0.351、0.485、1.287、1.334 Hz;各阶振型表现为:塔机的第一阶振型为起重臂的上下摆动,第二阶振型为起重臂的前后摆动,第三阶振型均为整机结构的左右摆动,第四阶振型为整机结构的前后摆动,第五阶振型为起重臂的一阶弯曲振型,第六阶振型为起重臂的二阶弯曲振型。分析结果为该起重机动态性能的优化奠定了基础,为其他同类结构的设计提供了参考。
This paper presents the dynamic characteristics of a flat-top tower crane based on the finite element method. It is concluded that the first six natural frequencies of the tower crane are 0.131, 0.190, 0.351, 0.485, 1.287 and 1.334 Hz respectively;The vibration modes of each stage are as follows: the first mode of the tower crane is the up and down swing of the lifting arm, the second mode is the front and back swing of the lifting arm, the third mode is the left and right swing of the whole structure, the fourth mode is the front and back swing of the whole structure, the fifth mode is the first bending mode of the lifting arm, and the sixth mode is the second bending mode of the lifting arm. The results provide basis for optimization of the crane′s dynamic characteristics, and reference for the design of other similar structures.
作者
赵雪芹
苏睿
ZHAO Xue-qin;SU Rui(School of Mechanical Engineering, Chengdu Technological University, Chengdu Sichuan 611730, China)
出处
《机械研究与应用》
2019年第2期5-7,共3页
Mechanical Research & Application
基金
成都工业学院企业专项:新型智能化塔机金属结构静动态特性分析(编号:2017QY026)
关键词
有限元法
平头塔机
动态特性
固有频率
振型
FEM (finite element method)
flat-top tower crane
dynamic characteristic
natural frequency
vibration mode
