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| Wind-induced fluid-structure interaction effect in flexible membrane structures |
| SUN Fangjin1,2, BI Peng2, LV Yanzhuo2 |
1. MOE Key Lab of Concrete and Pre-stressed Concrete Structures , Southeast University, Nanjing 210096, China;
2 College of Civil Engineering and Architecture, Liaoning Technical University, Fuxin 123000, China, |
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Abstract Here, the problem of wind-induced fluid-structure interaction effect of flexible membrane structures was solved using the strongly coupled monolithic equation. Aiming at the large deformation feature of membrane structures, a modified factor was introduced into the corrector step of the classical projection method to satisfy initial pressure boundary conditions implicitly defined in the original momentum method, and overcome defects of the classical projection method to large-deformation problems. The solving process of the strongly coupled monolithic equation with the modified projection method was presented, and the relevant solving equations were derived. This method was applied to calculate a 2-D fluid-structure interaction problem and wind-induced fluid-structure interaction effect of a 3-D flexible membrane structure. The performance and efficiency of the proposed modified projection method were evaluated. The results showed that the proposed modified projection method can be used to compute the wind-induced fluid-structure interaction effect of flexible membrane structures, its computation accuracy and efficiency are higher than those of the traditional methods; its modification value has little effects on the results while the number of iterations is an important factor to affect the results; its computation accuracy can be improved significantly by increasing the number of iterations with less increase in computation time and no effects on the computation stability.
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Received: 21 September 2016
Published: 28 June 2018
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