双钢轮压路机的非线性建模及其传动干扰分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: Nonlinear modeling and interference analysis for double-steel-wheel vibratory roller

Author(s):: Shen Peihui1; Lin Shuwen2; 1. Department of Mechanical Engineering, Fujian Shipping and Transportation Vocational College, Fuzhou, Fujian, 350007; 2. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian, 350002

Keywords:: double-steel-wheel vibratory roller; nonlinear jump-vibration model; apparent vibratory soil; transmission; interference

摘要:: 根据双钢轮振动压路机的整机结构特点和双激振工作特性,充分考虑前后随振土对压实系统的非线性振动耦合,建立了7自由度动力学跳振模型,基于周期内连耦—脱耦—再连耦的分解思路,以YZC12型压路机为算例,分析在平稳接触、轻微碰撞和强烈碰撞3种不同压实工况下系统的非线性振动响应.结果表明,前后轮跳振产生的运动偏移量是产生传动干扰的主要原因,随着代表不同密实度的压实进程土壤参数变化,系统时域波形出现简谐波式畸变,一阶、二阶和四阶频谱出现分数倍亚谐波和高次超谐波非线性响应直至进入混沌,同时行驶速度主要影响前后随振土的力学参数,进而影响前后轮的运动差异.通过主动控制机架与振动轮的一级减振系统参数可以明显弱化系统的非线性振动响应和前后轮的压实传动干扰.

Abstract:: According to the structural characteristics and double-excitation mode of the double-steel-wheel vibratory roller,a seven-degrees-of-freedom jump-vibration model was established fully considered the nonlinear coupling of apparent soil to the compacted system.Taking YZC12 compactor as an example and basing on the decomposition idea of coupling-decoupling-recoupling,the nonlinear vibration response of the system was analyzed in the three representative compaction conditions of smooth contact,slight impact and strong collision.Results showed that,the kinetic offsets between the front and rear wheels were the main reason of the transmission interference.With the change of soil parameters representing different density,the time domain waveform of system became harmonic distortions.The first order,second order and fourth order frequency would generate sub-harmonics and ultra-harmonics until into continuous spectrum of chaos the compaction process.In addition,driving speed mainly affected the vibratory parameters of the front back apparent soils,and then affected the movement interference of the front and rear wheels.Through active controlling the damping system parameters of the frame and the two wheels,the nonlinear vibration responses of the system could be obviously weakened,as well as the transmission interference of the front and rear wheels.