东南大学学报（自然科学版）2011，Vol.41Issue(6)：1277-1282,6.DOI:10.3969/j.issn.1001-0505.2011.06.028
半刚性基层沥青路面非连续结构强迫振动声效
Sound analysis of forced vibration feature of discontinuous structure in semi-rigid base asphalt pavement
摘要
Abstract
In order to identify the discontinuous state of semi-rigid base asphalt pavement structure nondestructively, rapidly, and realize the pavement disease prediction and preventive maintenance , the forced vibration mechanism and noise character in pavement structure under impact loading were analyzed, and forced vibration differential equation for single degree of freedom pavement system is solved. It is shown that the discontinuous disease in the asphalt pavement structure and interlayer comes from foundation settlement, low temperature construction, insufficient compaction and so on, and forced vibration noise character of the pavement are most sensitive to impact loading manner, pavement size, modulus, and the discontinuous area. Finally, by means of finite element simulation of sound field it is ascertained that the impact force of 1.0 kN is effective to identify the pavement structure discontinuity, and the maximal recognizable discontinuous area is 4 m x 4 m, and the majority of forced vibration noise energy is concentrated in the band of 300 - 800 Hz.关键词
道路工程/半刚性基层沥青路面/非连续结构/冲击加载/强迫振动微分方程/噪声响应频带/非连续性识别Key words
road engineering/semi-rigid base asphalt pavement/discontinuous structure/shock loading/differential equation of forced vibration/response frequency band of noise/discontinuity identification分类
交通工程引用本文复制引用
李志栋,黄晓明,岳学军..半刚性基层沥青路面非连续结构强迫振动声效[J].东南大学学报（自然科学版）,2011,41(6):1277-1282,6.基金项目
国家自然科学基金资助项目(51178112)、河南省交通科技资助项目(2009P225). （51178112）
