振动压实中后期振动轮与压实路面的接触非线性动力学研究  

Nonlinear dynamics of vibration wheel contact with compacted pavement in the middle and late stages of vibration compaction

作　　者：刘景旭 路永婕 王建西 商祥志 LIU Jing-xu;LU Yong-jie;WANG Jian-xi;SHANG Xiang-zhi(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behaviour and System Safety of Traffic Engineering Structures,Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学机械工程学院,河北石家庄050043 [2]省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [3]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《振动工程学报》2024年第7期1161-1168,共8页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(12072204);河北省自然科学基金资助项目(A2020210039)。

摘　　要：在考虑随振土体质量的基础上,建立三自由度振动压路机-土耦合动力学模型,通过分析振动轮的时频域图、Poincaré截面图、最大Lyapunov指数和轮-土动态接触力等响应,研究振动压路机振动轮在压实过程中的非线性动力学响应特性。数值仿真结果表明,随着路基压实度的增大,振动轮由单一周期运动演变为多周期运动,最终进入混沌状态;在演变过程中,振动轮加速度的频域特征由最初的单一基频向基频伴随有整倍频谐波过渡,最终以基频和1/2倍次谐波为主要部分;在进入混沌状态后减小激振力和增大激振频率都可以使混沌状态退化至近似单一周期运动,其中减小激振力对响应特征的影响为:频域响应存在较弱的1/3倍、2/3倍及高倍次谐波;而增大激振频率对响应特征的影响为:振动轮压实运动的单一周期更为明显。To explore the dynamic behavior mechanism between vibrating wheels and compacted pavement during subgrade vibra⁃tion compaction.To provide theoretical support for continuous compaction monitoring technology and intelligent compaction of pavement.Based on the consideration of the mass of the vibrating soil,a 3-degree-of-freedom vibratory roller-soil coupling dynamic model is established.The nonlinear dynamic response characteristics of the vibratory roller vibration wheel in the compaction pro⁃cess are studied by analyzing the time-frequency domain plot of the vibrating wheel,PoincaréMap,Largest Lyapunov Exponent,and the dynamic contact force of the wheel-soil.The numerical simulation results show that with an increase of subgrade compac⁃tion,the motion of the vibrating wheel evolves from a single cycle to a multi-cycle motion,and finally enters a chaotic state.In the process of evolution,the vibration wheel acceleration frequency domain characteristics from the initial single fundamental frequency to the fundamental frequency accompanied by an integral frequency harmonic transition.In the end,the fundamental frequency and 1/2 times the subharmonic are the main parts.After entering the chaotic state,reducing the excitation force and increasing the exci⁃tation frequency can make the chaotic state degenerate to approximately a single cycle motion.Among them,the response charac⁃teristics of reducing the excitation force are weak 1/3×,2/3×and high harmonics in the frequency domain response.Among the response characteristics of increasing the excitation frequency,the single cycle of the compaction movement of the vibrating wheel is more obvious.

关 键 词：非线性振动 振动轮 振动压实 非线性接触 混沌 

分 类 号：O322[理学—一般力学与力学基础] U415.6[理学—力学]