With the development of the fusion technology, the functions of the divertor have extended from single impurity control to multi-task. Many main tokamak devices in the world such as JET, JT-60U, ASDEX-U, DⅢ-D have mo...With the development of the fusion technology, the functions of the divertor have extended from single impurity control to multi-task. Many main tokamak devices in the world such as JET, JT-60U, ASDEX-U, DⅢ-D have modified their divertor systems in recent years and many experiments have been performed on them. They have the opened divertor systems which have relatively simplified the divertor structure. The plasma configuration with large minor radius, proper elongation and triangularity is easy to shape. So the opened divertor system is also adopted in the HL-2A modification.展开更多
Nonlinear solution of reinforced concrete structures, particularly complete load-deflection response, requires tracing of the equilibrium path and proper treatment of the limit and bifurcation points. In this regard, ...Nonlinear solution of reinforced concrete structures, particularly complete load-deflection response, requires tracing of the equilibrium path and proper treatment of the limit and bifurcation points. In this regard, ordinary solution techniques lead to instability near the limit points and also have problems in case of snap-through and snap-back. Thus they fail to predict the complete load-displacement response. The arc-length method serves the purpose well in principle, received wide acceptance in finite element analysis, and has been used extensively. However modifications to the basic idea are vital to meet the particular needs of the analysis. This paper reviews some of the recent developments of the method in the last two decades, with particular emphasis on nonlinear finite element analysis of reinforced concrete structures.展开更多
文摘With the development of the fusion technology, the functions of the divertor have extended from single impurity control to multi-task. Many main tokamak devices in the world such as JET, JT-60U, ASDEX-U, DⅢ-D have modified their divertor systems in recent years and many experiments have been performed on them. They have the opened divertor systems which have relatively simplified the divertor structure. The plasma configuration with large minor radius, proper elongation and triangularity is easy to shape. So the opened divertor system is also adopted in the HL-2A modification.
文摘Nonlinear solution of reinforced concrete structures, particularly complete load-deflection response, requires tracing of the equilibrium path and proper treatment of the limit and bifurcation points. In this regard, ordinary solution techniques lead to instability near the limit points and also have problems in case of snap-through and snap-back. Thus they fail to predict the complete load-displacement response. The arc-length method serves the purpose well in principle, received wide acceptance in finite element analysis, and has been used extensively. However modifications to the basic idea are vital to meet the particular needs of the analysis. This paper reviews some of the recent developments of the method in the last two decades, with particular emphasis on nonlinear finite element analysis of reinforced concrete structures.
