摘要
智能压实技术的核心在于振动加速度信号的精确采集,其测量精度直接影响压实质量评估的可靠性。然而,现有研究表明,传统安装位置采集的加速度数据与振动轮实际振动特性存在明显偏差。本研究通过开展振动压实现场试验,分析了压路机不同部位的振动响应特性,确定了能够真实反映振动轮动态特征的最优测量位置。试验结果表明,该测点在不被振动轮转动影响的前提下,测得的振动响应特征与振动轮测得的基准值保持一致。对比分析发现,传统测点的振动幅值仅为振动轮的5%,但两者在变化规律上呈现相同的趋势。振动压路机的减振系统能够实现从“振动轮-驾驶室”的98.63%的减振效果。当激振频率为33 Hz时,建议将驾驶员连续作业时间控制在3.54h以内。
The key of intelligent compaction technology lies in the accurate acquisition of vibration acceleration signals,and its measurement accuracy impacts the reliability of compaction quality evaluation.However,the existing research shows that there is a significant deviation between the acceleration data collected from the traditional installation position and the actual vibration characteristics of the vibrating wheel.In this study,the vibration response characteristics of different parts of the roller are analyzed by carrying out vibration pressure field test,and the optimal measurement position which can truly reflect the dynamic characteristics of the vibrating wheel is determined.The test results show that the measured vibration response characteristics of the measuring point are consistent with the reference values measured by the vibrating wheel without being affected by the rotation of the vibrating wheel.It is found that the vibration amplitude of traditional measuring point is only 5%of that of vibration wheel,but they show the same trend in changing law.The damping system of vibratory roller can achieve 98.63%damping effect from"vibrating wheel-cab".When the excitation frequency is 33 Hz,it is suggested that the driver's continuous operation time should be limited within 3.54h.
作者
刘芮宁
余雷
王祥
周先才
蒋红光
王育杰
LIU Ruining;YU Lei;WANG Xiang;ZHOU Xiancai;JIANG Hongguang;WANG Yujie(School of Qilu Transportation,Shandong University,Jinan,Shandong 250002,China;China Railway Economic Planning and Research Institute Co.,Ltd.,Beijing 100038,China;China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan,Hubei 430063,China;China Railway Engineering Design Consulting Group Co.,Ltd.,Beijing 100055,China)
出处
《铁路工程技术与经济》
2025年第6期18-22,32,共6页
Railway Engineering Technology and Economy
基金
国家自然科学基金面上项目(52378353)
中国国家铁路集团有限公司科技研究开发计划课题(N2023G062)
中铁工程设计咨询集团有限公司重点课题(KY2024A010)。
关键词
路基压实
现场试验
压实度
振动加速度
subgrade compaction
field test
degree of compaction
vibration acceleration
