振动桩锤控制系统调频变幅特性研究  

Characteristics Research on Frequency and Amplitude Control System for Vibratory Pile Hammer

作　　者：乌建中[1] 王伟达[1] 周文[1] 来鑫[1] 阮博[1] 

机构地区：[1]同济大学机械工程学院

出　　处：《工程机械》2012年第2期25-29,101,共5页Construction Machinery and Equipment

摘　　要：振动桩锤具有适应工况范围广,沉桩效率高等优点,在桩基础施工领域中的应用日益广泛。对于不同类型的土壤,实现高效沉桩所需的激振频率和振幅有着很大差别,因此对振动桩锤激振频率和振幅控制的研究显得尤为重要。设计基于S7-1200和XC164硬件开发平台的振动桩锤检测与控制系统,讨论振动桩锤激振频率、变幅比检测原理,对锤-桩-土机电耦合系统进行动力学分析,对大惯性负载条件下的激振频率跟随特性进行数值仿真,在此基础上设计了振动沉桩激振频率与变幅比控制方法,并进行了振动沉桩试验,试验结果表明,控制方法对激振频率与变幅比的控制精度高,超调小,调整时间短,可满足工程要求。Advantages of the vibratory pile hammer include broad suitability for work conditions and high efficiency in pile sinking so that it has been applied mostly in the field of foundation piling jobs. As for various types of soil, there are big differences among the vibration frequency and the amplitude to realize effective pile sinking. Therefore, it is extremely important to study the control of vibration frequency and amplitude for the vibratory pile hammer. The design was based on model S7-1 200 and XC164 platforms for hardware development in terms of the test and control system for vibratory hammer. Discussion was carried out on test principles of vibratory hammer, vibration frequency and the amplitude ratio, while making kinetic analysis of the mechanic-electric coupling system in the hammer-pile-soil relation. Numerical simulation was done for the vibratory frequency and its follow-up characteristics under great inertial conditions. In this basis we designed a method to control the vibratory frequency and the amplitude ratio for vibratory pile sinking, followed by tests on vibratory pile sinking. The test results show high control precision over the vibratory frequency and the amplitude ratio, with less over-modulation, shorter readjustment time to meet the working requirement.

关 键 词：振动桩锤 检测 控制 激振频率 变幅比 

分 类 号：TU67[建筑科学—建筑技术科学]