摘要
以振动沉桩机为例,研究了振动摩擦在沉拔桩机这一典型机械中的应用.建立了非线性动力学模型,采用龙格库塔法对振动沉桩机进行了数值仿真,得到了系统的动力学特性.仿真结果表明:随着激振力幅值和频率的增大,桩的振幅有一定的增大;随着激振力幅值的减小,桩的振幅有一定减小;随着激振力频率的减小,桩的振幅变化不大;改变系统刚度,桩的振幅有明显变化.
Taking the vibrating pile driver as a typical example, the applications of vibrationfriction to a class of similar machines were investigated. With the nonlinear dynamic model developed, the Runge-Kutta method was introduced into the numerical simulation of a vibrating pile driver to obtain the nonlinear dynamic characteristics of the system. The results revealed that the amplitude of pile increases to a certain extent with the amplitude and frequency of exciting force, and it decreases to a certain extent with the decreasing amplitude of exciting force. But the decreasing frequency of exciting force has no obvious influence on the amplitude of pile. The change in stiffness of the system will affect greatly the amplitude of pile.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第7期1015-1018,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(75104412)
国家自然科学基金资助项目(50805020)
中央高校基本科研业务费专项资金资助项目(N090603001)
关键词
振动摩擦
振动沉桩
摩擦阻力
龙格库塔法
vibration-friction
vibrating pile
frictional resistance
Runge-Kutta method
