The effects of(experiment) parameters,such as preload, dynamic load,fiber type and modulus on dynamic viscoelasticities were(investigated).

The assemble type and load of the spindle bearing is analyzed,and the practical example is taken to explain in detail applied preload and its measurement and calculation,the exercisable exact data is given.

The working principle of dielectric elastomer actuator(DEA)is analyzed,and the force-displacement curves of diamond DEA are measured and compared with the total equivalent preload produced by elastic preload parts to determine the elastic preload parts which can make the actuator obtain larger output displacement.

It introduces the bearing designed contents that include the bearing selection, determination of the bearing preload and selection of lubrication in spindle bearing.

In this paper,taking the 10000TEU containership being developed by MARIC as an object,the key techniques of structural design of very large containerships,such as design and optimization of midship sections,wave load analysis,global response of full vessel FE for torsion,vibration and noise analysis,etc.

Based on the equal strain consolidation model of vertical drains,the partial differential equations of the consolidation by sand drain ground were obtained,in which the influences such as the additional stress non-uniform distribution along depth with time-dependent preloading,and the well resistance and the smear action are taken into consideration.