摘要
为分析填充金属颗粒对打桩锤锤击力的影响,考虑填充金属颗粒的作用,用集中质量块表示填充的金属颗粒,用弹簧模拟金属颗粒与锤体相碰处的接触刚度,用不同的集中质量块表示桩锤、砧座和桩帽,用并联的弹簧、阻尼器表示锤垫,用弹簧表示桩垫,用阻尼器表示桩,建立了平衡方程。结合状态空间法,采用量纲一化计算方法分析了各参数对锤击力的影响,并对金属颗粒填充桩锤与普通桩锤产生的锤击力进行了比较。结果表明:在锤体内填充弹性模量小的材料制成的细金属颗粒,使桩锤产生的锤击力有效作用时间更长,能量传递效率更高。
In order to analyze the influence of filled metal particles on impact force for hydraulic pile hammer, analytical solution of mathematic model for pile hammer filled with metal particles （PHFMP） considering effects of metal particles was presented. In the solution, lumped mass were used as metal particles, a spring was used as contact stiffness between metal particles and hammer body, different variable lumped masses were used as pile hammer, the ram and anvil, a spring and a dashpot were used as the anvil cushion and pile respectively. Using non-dimensional calculation, influence of parameter on impact force was analyzed combined with state space method. Then, impact forces generated by common pile hammer and PHFMP were compared. Results show that small metal particles made of low elastic modulus material make the longer valid time of impact force and make the higher energy transfer efficiency.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2010年第2期122-126,共5页
China Journal of Highway and Transport
基金
湖南省科学技术厅科技计划项目(2008JT1014)
关键词
机械工程
桩锤
状态空间法
锤击力
金属颗粒
接触刚度
mechanical engineering
pile hammer
state space method
impact force
metal particle
contact stiffness
