Today, I followed Shanghai's first film structure editor to take a look at the application of the tensile film structure. I believe that many people are no stranger to the tensile membrane structure, so take the time to take a look.
1. The tensioned membrane structure is a new type of space structure system developed in the past two or three decades. It represents the most advanced level of structural design technology and outstanding achievements in materials science. However, the structure of the tension-tensioned membrane is flexible and the shape is complex, which brings difficulties to its research to a certain extent;
2. Tensile membrane film structure. A variety of high-strength thin film materials are used as covering structures. Because these film materials cannot resist bending moments, their shear resistance is very small, and they have a high degree of physical and geometrical nonlinearity. The design process and methods of traditional structures are completely different;
3. Tensile membrane membrane structure is a tension structure. Before applying prestress, the cable-membrane system was a mechanism, and only after applying the prestress, this mechanism became a structure with corresponding geometric stiffness;
4. A brief comparison and comparison of three commonly used form-finding analysis methods for tensile membrane structures: the basic principles of force density method, dynamic relaxation method, and nonlinear finite element method are described in detail. Explain the iterative equations and convergence criteria;
5. A brief description of the commonly used surface formation methods, and a method of combining the position movement of the fulcrum and the application of temperature load is proposed to apply prestress to the tensile membrane structure, and adjust the size and temperature of the temperature load. Initial stress to achieve the desired film surface stress magnitude and distribution, so as to achieve the purpose of finding shape;
6. In order to better describe the changes in the prestress of cables and membranes and the effects caused by tension errors during construction, according to the characteristics of nonlinear finite element shape finding, combined with finite element analysis software, for the membrane structure of cables and tension membranes The computer simulation of the tensile forming process is carried out, and a shape finding method based on this is proposed for the simple form of the tensile membrane structure:
7. Based on the shape-finding analysis of a small piece, the tensile membrane structure is analyzed under rigid support:
8. The form-finding analysis under the elastic support of the mast is considered, and the concept of interactive analysis and the specific analysis process are proposed.
Original finishing from Shanghai Shiyi Membrane Structure Co., Ltd.
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