With the example of taped pile, the buckling problem of variable section piles was analyzed with the energy method.
以锥形桩为例，用能量法对变截面桩的屈曲问题进行了深入研究。
2
The hyperbola model was taken as the load transfer function and the axial pile force was taken as iteration variable for compute iteratively.
桩侧传递函数采用双曲线模型，以桩身轴力为迭代变量，进行迭代计算。
3
Longitudinal vibration of pile with variable impedance (variable sections or modulus) in layered soil undergoing arbitrary load is theoretically investigated.