摘要
为了提升摊铺机熨平板的振动响应效果,改善其动态特性,首先建立了熨平板的动力学模型,根据拉格朗日定理对运动微分方程进行了求解,并通过虚拟样机仿真技术研究了熨平板箱体振幅响应与振动器频率的关系.然后提出了利用薄膜压力传感器测量振捣锤对地压力的方法,研究振捣锤对沥青料的压力与振捣频率的关系.最后在模态叠加理论的基础上,提出熨平板振动形态的测试方法,绘制出不同工作条件下的熨平板振动形态.结果表明,振动器工作频率在30-40Hz范围时,熨平板箱体振幅响应较明显;振捣机构工作频率在15-20 Hz范围时,振捣锤对沥青混合料的压力较小;振捣频率为15 Hz、振动频率为40 Hz的工作条件下,熨平板振动形态最平整,从而可以提升沥青层的平整度和密实度.
To improve the vibration response and dynamic characteristics of the paver screed, a dynamic model of the screed was established first. The differential motion equations were solved via the Euler-Lagrange theorem. The relationship between the amplitude responses of the screed box and the vibrator frequency was obtained through virtual prototyping simulation. Then, a new method for testing the beam pressure to the ground by film pressure sensor was put forward to study the relationship between the beam pressure and the tamper frequency. Finally, based on the modal superposition theory, a new method for testing the vibration shape of the screed was also put forward to figure out the vibration shapes of the screed under different conditions. Results show that when the vibrator frequency range is 30 to 40 Hz, the amplitude response of the screed box is more obvious. The beam has less pressure on asphalt mixture when the tamper frequency range is 15 to 20 Hz. Under the conditions of the tamper frequency 15 Hz and the vibrator frequency 40 Hz, the vibration shape of the screed is the smoothest, thus improving the smoothness and the quality of asphalt layer.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第6期1179-1185,共7页
Journal of Southeast University：Natural Science Edition
基金
江苏省科技支撑计划资助项目(BE2014133)
江苏省前瞻性联合研究资助项目(BY2014127-01)
关键词
摊铺机熨平板
动态特性
压力测量
模态叠加
振动形态
paver screed
dynamic characteristic
pressure measurement
mode superposition
vibration shape
