Fine simulation method of wind spectrum model
A simulation method and wind spectrum technology are applied in the field of accurate simulation of wind spectrum models in the wind resistance analysis of engineering structures to achieve the effect of reducing errors and wide application prospects.
Inactive Publication Date: 2011-09-14
SOUTHEAST UNIV
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Problems solved by technology
[0006] Technical problem: The purpose of this invention is to create a fine simulation method of wind spectrum model based on field measured results. This technology applies segmental simulation to the fitting of wind spectrum model, and solves the problem of fitting wind spectrum to a large extent. There is a large error between the measured wind spectrum model and the simulated wind spectrum model can more accurately reflect the real wind environment in which the structure is located
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[0024] According to the above technical scheme, the fine simulation technology of the wind spectrum model based on the measured wind characteristics and its realization process include the following four steps:
[0025] 1) Carry out a large number of strong / typhoon field measurements during strong / typhoon periods;
[0026] There are two methods of actual measurement. One is to pay attention to the weather forecast and estimate the time when the typhoon will pass the structure site during the typhoon every year. Prepare in advance and carry the precision measuring instrument-anemometer to the site for installation. According to the structure (our The focus is generally on the characteristics of the long-span bridge structure), select the appropriate measurement position, and for the long-span bridge structure, generally the mid-span or the top of the tower, install the anemometer and the bracket in place and measure the height of the anemometer (or protrude from the structure) ...
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The invention relates to a fine simulation method for a wind spectrum model. The method is to solve the problem of large error between a fitting wind spectrum model and an actually-measured wind spectrum model so as to more accurately simulate the wind spectrum model adopted in the wind resistance analysis of an engineering structure. Firstly, mass actually-measured data of wind property is subjected to power spectrum analysis to obtain the actually-measured wind spectrum model; secondly, an inflection point and the position of the actually-measured wind spectrum model are found out in a frequency domain; according to the inflection point, the wind spectrum model is divided into sections in the frequency domain; and finally, each section of the wind spectrum model is subjected to fitting respectively. Obviously, the wind spectrum model obtained by subsection fitting is more inosculated with the actually-measured wind spectrum; wind load born by an obtained structural object also more meets actual situation; therefore, the wind spectrum model can be more accurately and reliably applied to wind resistance design of the engineering structure.
Description
technical field [0001] The invention relates to a fine simulation technology of a wind spectrum model based on field measured results, and is especially suitable for accurate simulation of wind spectrum models in wind resistance analysis of engineering structures. Background technique [0002] Wind disaster is one of the main disasters of natural disasters, which causes huge casualties and economic losses. Therefore, it is of great significance to study the effect of wind on structures. After more than 30 years of hard work, structural wind engineering research has made great progress, solved some engineering practical problems, and made contributions to promoting scientific progress and social development. [0003] The field measurement of wind characteristics is of great value to the development of structural wind engineering, especially the test and analysis of the strong wind characteristics of the near-ground boundary layer, which is closely related to the study of str...
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IPC IPC(8): G01M99/00
Inventor 王浩李爱群谢静李杏平
Owner SOUTHEAST UNIV