The planned size of the Olympic venue is about 6.65 hectares and the construction area is 32,000 square meters, which can accommodate 6,000 people. The first floor consists of a group of houses with a diameter of 132m below the main stadium, a rectangular building with a rectangular shape on the east side, and a single-storey strip section extending northward. This layer concentrates most of the management, reception, and office except the stadium. Rest, technical support, equipment room and transportation assistance. The second floor is the saddle-shaped main stadium, with an infield and a wooden track surrounding the infield. There is a ring-shaped rest hall at the 7.5-meter elevation of the stadium. The stairs, elevators, toilets and other rooms are used as the vertical transportation hub of the stadium. The stadium is approximately elliptical, with a long axis of 144 meters, a short axis of 130 meters and a total height of 13.04 meters. The scale is large and the structure is complex. It is difficult to obtain satisfactory results with general software. For this reason, the large-scale structural analysis software-ANSYS8.0 is used to reasonably model the building structure, and it is static and modular. State analysis, in the static analysis, various load combinations were carried out, and the results of deformation, axial force and bending moment of beams, columns, walls and plates were obtained. The weak members of the structure were proposed. A certain reference value; and the first 40-order frequency and vibration mode of the structure are obtained, and the characteristics of the vibration mode are analyzed. The correctness of the calculation model is the primary problem for finite element calculation. Due to the complex shape of the structure, the conventional structure method cannot be used to simplify the calculation of the Olympic venues. On the other hand, it is not allowed to simplify the structure too much. In order to ensure that the model is realistic, the following measures have been taken: (1) The accuracy of geometric dimensions is the most basic and important step in modeling. We use it according to the design drawings. The AUTOCAD program modifies the graphic file generated by PKPM, takes the double-line beam as the center line, takes the column to its center, and generates a single-line column accordingly. Under the premise of ensuring that the calculation model conforms to the actual situation in AUTOCAD, the three-dimensional graphics of the model are established. (2) Unit selection and grid division: High-precision unit types are selected, using different unit types: The beam and column adopt Beam188, the floor adopts Shell63, and Surf154 is used to add vertical load. The various unit types are suitable for different force and deformation characteristics of the structure, and the meshing is as high-precision mesh as possible. (3) The scale of the calculation model: In the modeling process, the method of construction and calibration is adopted, and finally a total mass is built. It is 2.0847×10 4 kg with a 3D analysis model of 41938 units, 34 section types, and 147564 degrees of freedom. As shown in Figure 1: Next page Aluminum Alloy Handle,Circular Door Handle,Invisible Door Handle,Bathroom Glass Door Handle Zhaoqing Muyi Hardware Products Co., Ltd , https://www.muyihardware.com
1 Introduction
2 Establishment of structural analysis model 