A two-dimensional dynamic model analysis method and system for a high-rise TV tower structure
A dynamic model and analysis method technology, which is applied in the field of two-dimensional dynamic model analysis of tall TV tower structures, can solve the problem that the model parameters of the two-dimensional series multi-degree-of-freedom model cannot be corrected, and does not meet the requirements of structural stiffness matrix symmetry. Problems such as large workload, to achieve the effect of clear physical concept, wide application range, and large workload of calculation and analysis
Inactive Publication Date: 2020-04-21
WUHAN UNIV OF TECH
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[0004] There are many deficiencies in the two-dimensional series multi-degree-of-freedom model analysis method commonly used at present: 1) This two-dimensional series multi-degree-of-freedom model analysis method is obtained based on the inversion of the flexibility matrix of the three-dimensional finite element model. Due to numerical calculation errors, the structural The flexibility matrix and stiffness matrix are not strictly symmetric matrices, which do not meet the symmetry requirements of the structural stiffness matrix; 2) The stiffness matrix obtained by inverting the flexibility matrix is full, and the calculation and analysis workload in the dynamic analysis process is compared with Compared with the sparse matrix, the analysis accuracy is limited; 3) The model parameters of the two-dimensional serial multi-degree-of-freedom model cannot be corrected based on the real structural dynamic characteristic parameters, and its accuracy depends entirely on the accuracy of the original three-dimensional finite element model
Aiming at the problem of the simplified model of the current high-rise TV tower structure, the present invention proposes a two-dimensional dynamic model analysis method for the high-rise TV tower structure
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[0058] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0059] Such as figure 1 As shown, the embodiment of the present invention first establishes a three-dimensional finite element model of a towering TV tower structure. Further determine the number and location of node layers of the 2D dynamic analysis model. The initial stiffness coefficients of each node layer are determined, and the stiffness matrix and mass matrix of the two-dimensional dynamic analysis model are established. The natural frequencies of different models are determined based on the three-dimensional finite element model and the two-dimensional dynamic model. The objective function for the correction of t...
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The invention discloses an analysis method and system for the two-dimensional dynamic model of a high television tower structure. The method comprises the following steps that: firstly, concentratingthe masses of all structural members and non-structural members of the high television tower in a selected finite node layer, and determining positions where the node layers are arranged and the amount of the arranged node layers; on the basis of a finite element submodel corresponding to each node layer, determining the equivalent stiffness of the finite element submodel, and establishing the rigidity matrix and the mass matrix of the two-dimensional dynamic model; on the basis of the dynamic characteristics of a three-dimensional finite element model and the two-dimensional dynamic model, establishing the target function of the rigidity parameter, and carrying out the rigidity parameter correction of the two-dimensional dynamic model; and on the basis of the corrected rigidity parameter,establishing the two-dimensional dynamic model, and quickly solving the dynamic characteristics and the dynamic response of the high structure on the basis of a structural feature equation and a kinematic equation. The method disclosed by the invention has the advantages of clear physical concept, high maneuverability, quickness and accuracy in analysis and calculation, wide applicable range andthe like.
Description
technical field [0001] The invention relates to a high-rise TV tower structure performance evaluation technology, in particular to a two-dimensional dynamic model analysis method and system for a high-rise TV tower structure. Background technique [0002] In recent years, with the rapid development of social economy, the construction of high-rise TV tower structures in my country has entered a new period, and many large-scale high-rise TV tower structures have been built one after another. The application of new technologies and new materials makes the structure of towering TV towers tend to be taller and more flexible. Under the action of wind load and earthquake, the structural dynamic response is strong, and it is difficult to meet the requirements of safety and comfort. Therefore, how to ensure the safety of the high-rise TV tower structure under the action of external loads is a practical problem before the majority of engineering and technical personnel and scientific ...
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IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor陈波田利瑞聂峰华李闯
OwnerWUHAN UNIV OF TECH