A Software Development Of From--Finding Methods For Tensioned Cable_Membrane Structure

Tensioned Cable-Membrane structure is a new structure form. This structure has many shape. It is very fashion to have one Tensioned Cable-Membrane structures in modern building. With quickly developing,this structure form has a flourishing future in our country. Since our country is a developing country, we need more spacial structure. Modern Tensioned Cable-Membrane structure have seven or eight's history in our country which keeping strongly developing trend. We drop behind foreign countries in this field. We should develop our own software. The FEM theroy of this structure is mature, but we need a software compose of visualization,frame,analysis,compute.We should get the tension of cable and membrane when construct a Tensioned Cable-Membrane structure. It is the purpose of this paper.The core calculation part of this software use VC++ language. This program is an object-oriented program with nodeclass,keypointclass,element class,membraneclass,cable class,one-dimensional bandwidth class,trianglematrix class and so on. The calculation theory is geometry non-linear FEM method. It is save time by iteration method.The visualization part of this software use OpenGL language. The advantage of this method is that the program need't depend on other soft. The visualization part realize three-dimensional graph's translation and rotation,lighting ,depth,box select in and out. This software became more convenience with mouse response and cursor display. The visualization part is also an object-oriented program.The interface part of this software use dialog and menu resource provided by VC++. It is convenience to import and export data.The program can display iteration error and result.The software also provide a document and view frame.The progress of computing is shown while calculation.There is a example to prove the accurate of this dissertation. There are also some examples to expain the utility of this software. This dissertation put forward a method (min areas method) to judge whether the calculation is convergence. An advice is provided by analysis of the result.