Experimental and theoretical studies of drag embedment plate anchors recently carried out in Tianjin University are summarized in this research paper, which involve a series of important topics relevant to the study o...Experimental and theoretical studies of drag embedment plate anchors recently carried out in Tianjin University are summarized in this research paper, which involve a series of important topics relevant to the study of drag anchors. The techniques for measuring the trajectory and movement direction of drag anchors in soils, the techniques for measuring the moving embedment point and reverse eatenary shape of the embedded drag line, the penetration mechanism and kinematic behavior of drag anchors, the ultimate embedment depth of drag anchors, the movement direction of the anchor with an arbitrary fluke section, the reverse catenary properties of the embedded drag line, the interaetional properties between drag anchor and installation line, the kinematic model of drag anchors in seabed soils, and the analytical method for predicting the anchor trajectory in soils will all be examined. The present work remarkably reduces the uncertainties in design and analysis of drag embedment plate anchors, and is beneficial to improving the application of this new type of drag anchor in offshore engineering.展开更多
In this paper, a new method of earthquakes prediction taking into account the influence of strain solitary waves as a ＂trigger＂ of some shocks is presented. Methods of forecasting are based on evaluating trajectorie...In this paper, a new method of earthquakes prediction taking into account the influence of strain solitary waves as a ＂trigger＂ of some shocks is presented. Methods of forecasting are based on evaluating trajectories of individual solitons and clarification of shocks probability. Solitary waves are considered in solid anisotropic elastic medium and proved that there exist the motion equations solutions in the form of solitary waves. Predicting the trajectories of solitary waves related to the moment problem for the special case of Chebyshev system of functions or exponential problem. This problem is solved using special bijective mapping. Seismic process in the region of Japanese Islands, March 11,2011 is analyzed as an example.展开更多
基金Foundation item： Supported by the National Natural Science Foundation of China （Grant nos. 50639030 and 50979070） and the 863 Program of China （Grant no. 2006AA09Z348）.
文摘Experimental and theoretical studies of drag embedment plate anchors recently carried out in Tianjin University are summarized in this research paper, which involve a series of important topics relevant to the study of drag anchors. The techniques for measuring the trajectory and movement direction of drag anchors in soils, the techniques for measuring the moving embedment point and reverse eatenary shape of the embedded drag line, the penetration mechanism and kinematic behavior of drag anchors, the ultimate embedment depth of drag anchors, the movement direction of the anchor with an arbitrary fluke section, the reverse catenary properties of the embedded drag line, the interaetional properties between drag anchor and installation line, the kinematic model of drag anchors in seabed soils, and the analytical method for predicting the anchor trajectory in soils will all be examined. The present work remarkably reduces the uncertainties in design and analysis of drag embedment plate anchors, and is beneficial to improving the application of this new type of drag anchor in offshore engineering.
文摘In this paper, a new method of earthquakes prediction taking into account the influence of strain solitary waves as a ＂trigger＂ of some shocks is presented. Methods of forecasting are based on evaluating trajectories of individual solitons and clarification of shocks probability. Solitary waves are considered in solid anisotropic elastic medium and proved that there exist the motion equations solutions in the form of solitary waves. Predicting the trajectories of solitary waves related to the moment problem for the special case of Chebyshev system of functions or exponential problem. This problem is solved using special bijective mapping. Seismic process in the region of Japanese Islands, March 11,2011 is analyzed as an example.
