The densities of the vortexes are related to the ones of the traveling waves,and the drag reduction effect of the V-size traveling waves is increased as the ratios of the traveling waves are getting larger with the same height.

Some rules about riblet surface’s drag reduction effect influenced by spacing were found out primarily.

Field application shows that DRA reinjection at middle pump station to DRA-added pipeline can obtain certain drag reduction effectiveness and increase throughput,but drag reduction rate is lower than that of DRA reinjection at the front pump station.

It can be used not only to change the fire precision of the base bleed projectile,but also to improve the effect of reduction drag and expansion range.

Computer program for dynamic analysis of a structure including a Maxwell damping unit in itself as well was developed with Fortran and the damping effect of the damper on the anti-seismic performance of continuous girder bridges was investigated.

The analyses conclusions indicate that a good damping effect and a better earthquake resistant behavior of continuous girder bridges could be obtained with the help of metallic dampers.

Test results show that, on one hand, combined energy dissipation system has favorable reducing vibration effects on structural displacement and acceleration.

In this paper, some orderliness through researching the offect of the peeling process rate as well as peeling process result of polyester fabric by peeling process parameter in the LMV092 continuous alkali peeling process machine (alkali concentration, steaming temperature, steaming time, assistants, mangle expressions) were attained.