液压打桩锤冲击噪声的分析及其控制方法  

Analysis and Control of Impact Noise of Hydraulic Pile Drivers

作　　者：胡均平[1] 王涛[1] 化世阳[1] 

机构地区：[1]中南大学机电工程学院,长沙410083

出　　处：《噪声与振动控制》2009年第5期148-151,共4页Noise and Vibration Control

摘　　要：首先阐述了控制液压锤冲击噪声的重要性,介绍了冲击噪声的声学流固耦合理论及其有限元方法。根据冲击频谱的理论特性,分析了噪声与缓冲时间的关系,并利用有限元分析软件ANSYS/LS-DYNA进行仿真,从而论证了通过延长缓冲时间来控制噪声方法的有效性。The importance of impact noise control of hydraulic pile drivers is elaborated. The theory of acoustic fluid-structure coupling and the corresponding finite element method are introduced. According to the theoretical characteristics of impact frequency spectrum, the relation of noise and buffer time is analyzed. Using the finite element software ANSYS/LS-DYNA, the numerical simulation of impact of a pile driver is carried out. The results show that the impact noise can be reduced by prolonging the buffer time.

关 键 词：声学 冲击噪声 流固耦合 ANSYS/LS—DYNA 缓冲时间 

分 类 号：TU112.3[建筑科学—建筑理论]