The elastic model based on the stiffness equation is presented, and the stiffness model of the whole structure is constructed via the stiffness assembly and coordinationequation.
The deformation coordinationequation of worm gear for rolling cone worm gearing is introduced, and the formulae of forces analysis and the rolling - and - sliding friction coefficient are given.
Assuming no slippage occurred on the interface between pile and soil, an equivalent equation of displacement coordination is obtained to constitute a new method calculating settlement of single pile.