摘要
为了弥补空沟隔振和波阻板隔振的缺陷,提出新型的空沟-波阻板联合隔振体系。结合完美匹配层吸收边界,利用COMSOL建立简谐荷载作用下在弹性半空间中设置空沟-波阻板隔振屏障的有限元模型,对空沟-波阻板联合隔振体系的隔振性能进行三维数值分析。通过数值算例分析空沟-波阻板联合隔振屏障的物性参数(地基与波阻板的模量比)、几何参数(空沟深度、波阻板深度、屏障长度和距振源的距离)以及载荷参数(振动波频率)等对其隔振性能的影响规律。结果表明:空沟-波阻板联合隔振屏障较单一的空沟屏障或波阻板屏障具有更优越的可设计性和隔振性能;空沟深度达到0.3 L_R时,隔振效果较好;波阻板深度、屏障宽度越大,隔振效果越好;当联合屏障的长度达到2.5 L_R时隔振效果较好;空沟-波阻板联合屏障更适用于近场主动隔振。
To make up for the defects of hollow gully isolation and wave baffle isolation,a new joint hollow gully and wave baffle vibration isolation system was proposed.Combined with the absorption boundary of the perfectly matched layer,a finite element model was established by COMSOL,which was used to establish the isolation barrier in the elastic half-space under harmonic load.The effects of physical parameters(modulus ratio between foundation and wave resistance plate),geometric parameters(depth of ditch,depth of wave resistance plate,length of barrier and distance from vibration source)and load parameters(frequency of vibration wave)on vibration isolation performance were analyzed by numerical examples.The results show that the combined isolation barrier has better vibration isolation performance than the single iso-lation barrier.When the groove depth reaches 0.3 LR,the vibration isolation effect is better.The larger the depth of the wave baffle and the width of the barrier,the better the vibration isolation effect;When the length of the combined barrier reaches 2.5 LR,the vibration isolation effect is better.The combined barrier of air trench and wave baffle is more suitable for active vibration isolation in near field.
作者
任康乐
曹小林
刘佳
马强
REN Kange;CAO Xiaoin;LIU Jia;MA Qiang(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;School of Civil Engineering,Qinghai University,Xining 810016,China)
出处
《噪声与振动控制》
北大核心
2025年第3期256-261,共6页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51978320,11962016)
兰州理工大学红柳优秀青年人才支撑计划资助项目
甘肃省高校教师创新技能基金资助项目(2024A-019)。
关键词
振动与波
空沟-波阻板联合屏障
三维分析
有限单元法
隔振效果
主动隔振
vibration and wave
open trench-WIB combined barrier
three-dimensional analysis
finite element meth-od
isolation effectiveness
active vibration isolation
