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| A research on fast algorithm for simulation of non-gaussian wind field on large-span roof structures |
| Received:August 23, 2008 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20102017 |
| KeyWord:roof structures non-Gaussian process wind pressure field simulation four-parameter exponential function nonlinear transformation |
| Author | Institution |
| 李璟 |
华南理工大学 土木工程系 亚热带建筑科学国家重点实验室,广州 ;广东工业大学土木与交通工程学院,广州 |
| 韩大建 |
华南理工大学 土木工程系 亚热带建筑科学国家重点实验室,广州 |
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| Abstract: |
| To reproduce the non-Gaussian nature of wind pressure fluctuations on roofs, a new simulation algorithm is proposed for generating a multi-variate stationary non-Gaussian wind pressure field. A novel four-parameter exponential function is used to express the transformation of a Gaussian process to the non-Gaussian wind pressure process. Then a set of nonlinear equations is derived to determine the parameters of the exponential function. Based on the property of the joint density of a bi-variate Gaussian vector, the relation between correlation functions is obtained. Therefore the non-Gaussian wind pressure field is expressed as a function of a fictitious Gaussian vector process. And the wave superposition method can be employed to generate the underlying Gaussian processes. The engineering example indicates that the proposed algorithm is both efficient and accurate. Hence the algorithm is suitable for engineering application. |
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