The secondorder effects of the whole structure and its members, geometric imperfections and residual stress as well as the feature of semi-rigid connections can be taken into account in this method.
The second kind of these techniques is the ultrasonic impact technique which was used in the welding process in order to reduce the residual tension stress in the welding area of the ship structure.
第二种是超声波冲击技术,用以减少船舶结构中的焊接区域出现的残余应力。
3
The stress action of secondorder tectonic stress district shows coherence in a relatively large area. This stress field is controlled by regional block interaction.