摘要
针对智能振动压路机垂直激振的特点,根据压实进程中土壤参数的变化,按工况分阶段建立二自由度动力学模型,研究接地振压、接地跳振、跳振3种工况下振动轮与土壤相互作用的动力学过程.以XG6133D型智能振动压路机为算例,分析压实系统的幅频特性及响应特性.结果表明:一阶、二阶共振频率及共振幅度随减震器参数、土壤参数的变化而发生相应变化;压实进程中振动轮运动呈现从单周期到倍周期的变化,其时域波形的波峰、波谷出现简谐波式削平,频谱除基波外含丰富的分数倍亚谐波和高次倍谐波.
Based on the vertical excitation character of intelligent vibratory roller and soil parameters,three compaction conditions such as grounding vibration,grounding jump vibration and jump vibration were classified during compaction process.According to the working condition in stages,the interacted dynamic process between drum and soil,and its response characteristics were analyzed.Taking XG6133D intelligent roller as an example,the amplitude-frequency characteristics and response characteristics were investigated by means of numerical simulation.First order,second order resonance frequency and resonance amplitudes changed along with the shock absorber parameters and soil parameters.During the compaction process,the motion of vibratory drum occurred from single periodic motion to periodic doubling motion,the peaks and valleys of its time responses were induced to be distorted to simple harmonic wave,and spectrums presented rich subharmonics and ultraharmonics in addition to the fundamental wave.
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2013年第6期671-676,共6页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
国家自然科学基金资助项目(51175086)
福建省自然科学基金资助项目(2013J01171
2012J05055)
关键词
智能振动压路机
垂直激振
跳振
幅频特性
响应特性
intelligent vibratory roller
vertical excitation
jump vibration
amplitude-frequency characteristic
response characteristic
