桿系結(jié)構(gòu)形態(tài)創(chuàng)構(gòu)方法研究
[Abstract]:The structure form creation structure is one of the emerging research directions in the intersection of architecture and structure, which is from the structural analysis to seek a variety of "Good" The theoretical method of building shape has deep meaning for the further development of architecture and structural design. The structure type of the rod system is numerous, which is widely used in practical engineering, and the research on the shape-building method of the rod system structure has higher application value and contributes to the diversification of the form of the building. Based on the theory of structural optimization, this paper takes into consideration the constraint condition of building space and maximizes the structural rigidity as the design goal, and puts forward the method of constructing the rod system structure with the shape, topology and section. In the method, the generality of the program is taken into account so that the method can be used for the morphogenesis of various rod system structures. This paper mainly carries out the following aspects: 1. The nodal modulation of the structure of the rod system is established. Based on the relation of strain energy and nodal coordinate, the expression of strain energy sensitivity of node is derived, and it is taken into account. The constrained conditions are restricted, and the mobility strain energy of constrained nodes is obtained. In this paper, the characteristic of the sensitivity of the node moving strain energy is analyzed in detail, and the rod system structure with maximum structural rigidity is proposed according to the sensitivity of strain energy to the coordinate of the node. In order to improve the efficiency of evolution, the method for correcting the direction of movement of the node is further studied, and the method for constructing the shape of the rod system structure is further studied. An improvement was made. It was found that in the convergence stage, the node movement sensitivity tends to be zero, and the structure of this phase has no effect on the initial defect. a sensitive feature. A rod-tied knot with topology and shape is proposed. In order to evaluate the contribution of each unit to the resistance load in the whole structure, the structure topological form-forming method defines the sensitivity of the cell increase/ decrease strain energy and uses it as a measure By means of the characteristic of increasing the sensitivity of the unit to increase or decrease the strain energy sensitivity, the strategy of cell increase and decrease is studied, and the node adjustment is combined, and a balance is put forward. The invention realizes the topology change of the structure by directly eliminating the low-efficiency unit and increasing the unit in the vicinity of the high-efficiency unit, The initial structure of the method is simple, in that method, the cross-section optimization is also introduce in the method, so that the method can balance the shape, The method is widely used and can be used in plane and space. The shape of the structure of all kinds of rod systems is invasive. 3. In the form of the rod structure, In the construction method, the constraints of building space are taken into account to enhance the practicability of the method, and B-spline curve (curved surface) is adopted to express the space constraint conditions proposed by the building. the reaction is given during the derivation of the strain energy sensitivity, furthermore, the influence of the initial structure on the final structure is also utilized, because the initial structure is the starting point of the structural evolution, the basic possible space is also provided for the generation of the new rod, It plays an important role in the realization of the restriction condition of the building space. It also enhances the practicability of the method by processing the space constraint conditions in different applications. At the same time, it also enriches the content of structural form-building method. 4. The application of the method in plane and spatial structure in order to explore the applicability of the method, the structure in the plane and spatial structure, The tree-shaped structure, bridge type structure and so on have been calculated Example application practice. Example shows the applicability and practicability of the method. For different bearing conditions, different initial structural conditions, different conditions, In this paper, the structural changes and mechanical properties of the structures in the evolution process were investigated. This paper sums up the influence of the creation strategy on the structural changes and the characteristics of the method. The graceful arc shape, which is beneficial to the realization of aesthetic intention in architectural modeling. At the same time, the resulting structure form The Concept of Mechanical Mechanics can be a Structural Mechanics Education and Structural Design Reference is given. 5. The mechanical properties of the structure obtained by the method are studied and summarized. From the change of the mechanical quantity of a large number of examples, it can be seen that both the topology and the shape of the rod are considered. The structural shape-building method can make the structure provide rigidity to the structure. In the direction of high bending moment, the final structure will take axial force as the main axis. The node adjustment in the method contributes more to the structural mechanics performance. The stability of the structure before and after the adjustment of the node is checked, and the result shows that the post-adjustment structure can be improved not only The structural stiffness can improve the ultimate bearing capacity and improve the effect of the initial node deviation on the structure. Although the strain energy can be used as the objective function, several mechanical performance indexes can be improved at the same time: structural rigidity, structural limit bearing capacity, structural mechanics, The stability of properties, etc., these mechanical properties have a tendency to improve at the same time during the process of evolution. Programming realization, using ANSYS finite element software to study
【學位授予單位】:哈爾濱工業(yè)大學
【學位級別】:博士
【學位授予年份】:2013
【分類號】:TU32
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