This method can calculate the nonlinear friction force conveniently and can consider the effects of the blade high modes and the high harmonics of the blade responses.
该方法能够方便地计算接触面非线性摩擦力，考虑响应的高次谐波以及叶片高阶振型的影响。
Measured Q-S curve are back figured by nonlinear optimization approach and model parameters are found simultaneously, then distribution of axial force and skin friction along pile are calculated.
通过非线性优化算法，拟合实测的Q—S曲线，可得到桩土系统的工程力学参数，并由此计算得到桩身轴力及侧摩阻力分布曲线。
This nonlinear change in friction force over a small change in velocity results in uncomfortable feeling when people hitchhike hydraulic lift.
该摩擦力的非线性改变使速度产生变化，导致人们在搭乘液压电梯时产生不舒适感。
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