No abstract

Three types of tip-structure include open-end, semi-closed and full close are tested to verify the feasibility of improving the ultimate bearing capacity in stiff clay layer. Driving pile trials are carried out in the site. This paper presents the analysis of set, driving stresses and bearing capacity according to the survey of set, driving monitoring, high strain dynamic test and the axial compression static test. It is proved that the closed end is the most feasible structure in stiff clay layer.

The paper presents the magnetic field distribution from the armature winding currents in the slotted air gap of surface-mounted permanent magnet (SMPM) motors using the Schwarz- Christoffel(SC) mapping. With the method, a slotted structure of SMPM motors is transformed into a geometrically simpler domain. Compared with the result from the finite element method, the accuracy of the method is verified. The presented work can be a basic tool for optimizing design and performance analysis of permanent magnet motors.