振动压路机在压实过程中的瞬态响应
2016-02-24徐冉宋年波
徐冉++宋年波



摘 要:为解决振动压路机因建模不精确和设计时数学分析不足而导致的智能压实系统精确度低的问题,对压路机的动态特性进行了研究。根据智能压实中沥青路面压实能量变化,对压路机的振幅和频率进行适时调整,并采用试验方法确定了路面的厚度、沥青混合料的种类等对响应特性的影响,分析了振动压路机压实过程中的瞬态响应。该响应特性可以用来深入研究反馈控制从而改善智能压实系统。
关键词:智能压实;振动加速度;信号处理;瞬态响应
中图分类号:U415.521 文献标志码:B
Transient Response of Vibratory Roller During Compaction
XU Ran1, SONG Nian- bo2
(1. School of Construction Machinery, Changan University, Xian 710064, Shaanxi, China;
2. Military Transportation Department, Logistics University of Peoples Armed Police Force, Tianjin 300309, China)
Abstract: In order to solve the problem of low accuracy of the intelligent compaction system due to imprecise modeling and lack of mathematical analysis in design, the dynamic characteristics of vibratory roller were studied. The amplitude and frequency were timely tuned according to the compaction energy change. The impact of the thickness of the pavement and the types of asphalt mixture on response characteristics was determined by running tests. The transient response of vibratory roller during compaction was analyzed, which could be used to study the feedback control and improve the intelligent compaction system.
Key words: intelligent compaction; vibratory acceleration; signal processing; transient response
0 引 言
截止2013年,中国高速公路里程已达9.6万km,其中沥青路面占90%以上。如果能够提高沥青路面施工的质量,便可以大大降低每年对路面的维护费用。在路面施工中,良好的压实能使沥青路面在强度、稳定性、耐用性和使用寿命上均有所提高,并有效减少车辙、低温开裂和老化现象。如将沥青混合料的压实度提高1%,其承载能力可增加10%~15%。沥青混合料的压实受很多因素的影响,要想获得均匀的压实效果,则需根据不同路面区域的压实需要施加不同的压实力[1- 2]。
智能压实是压实技术发展的里程碑,通常是指运用配备了现场实时测量、显示和反馈控制系统的振动压路机进行压实。智能压实设备能在压实过程中测量和记录压实质量,随着压实过程的进行根据被压材料以及机械运行的状况自行判断、调节压实性能参数,从而实现最佳压实效果。……
