抱压式锚杆静压桩机夹桩箱的有限元模态分析  

Finite Element Modal Analysis of Pile Clamping Box of Holding Pressure Anchor Static Pile Driver

作　　者：吕文龙 沈仁良 Lyu Wenlong;Shen Renliang

机构地区：[1]广东省建筑科学研究院集团股份有限公司,广东广州510500

出　　处：《工程机械》2022年第11期99-102,I0014,共5页Construction Machinery and Equipment

基　　金：住房与城乡建设部科技计划资助项目(No.2017-k10-006);广东省住房与城乡建设厅科技计划资助项目(2020-13)。

摘　　要：为改善锚杆静压桩机夹桩箱的动态特性,提高其工作的可靠性,以振动力学和有限元理论为基础,建立夹桩箱的有限元模型,计算其前9阶固有频率和固有振型。研究结果表明:1)在压桩状态下,外界对夹桩箱激励响应的频率应避开夹桩箱固有频率;2)通过所计算出的振型图可以直观地分析夹桩箱的动态特性,找出夹桩箱的薄弱环节,提高其强度,为夹桩箱的设计和改进提供参考依据。In order to improve the dynamic characteristics of the pile clamping box of the anchor static pile driver and to enhance its working reliability, a finite element model of the pile clamping box is established based on mechanics of vibration and finite element theory, and the first 9 order natural frequencies and natural vibration modes are calculated. The research results show that: 1) under the condition of pile pressing, the frequencies of the external excitation response to the pile clamping box shall avoid the natural frequencies of the pile clamping box;2) the dynamic characteristics of the pile clamping box can be intuitively analyzed from the calculated vibration modes to identify the weak points and to improve its strength, which provides a reference basis for the design and improvement of the pile clamping box.

关 键 词：压桩 夹桩机构 抱压 锚杆静压桩机 有限元模态分析 

分 类 号：TU67[建筑科学—建筑技术科学]