基于虛擬彈性體的快速動網(wǎng)格方法
[Abstract]:In order to reduce the computational time of fluid-solid coupling, a fast moving mesh method is developed based on the existing elastomer method. Firstly, according to the basic assumptions of the elastic body method, the spatial region surrounded by the flow field mesh is regarded as a virtual elastic body, then the structure and the virtual elastic body are regarded as a whole system, and the vibration modes and frequencies of the natural vibration are calculated. Finally, the displacement of the grid nodes of the structure and the flow field is calculated by the mode superposition method with the fluid force acting on the structure as the excitation. Considering that the fluid-solid coupling vibration of the actual structure is mostly the vibration of the low-order mode, the displacement of the grid nodes in the flow field can be calculated by the superposition of the low-order modes in the fluid-solid coupling calculation, and the purpose of rapidly updating the flow field grid can be achieved. The fluid-solid coupling analysis of an elastic beam flutter problem is carried out by using the fast moving mesh algorithm. The calculated results are in good agreement with those obtained in previous literatures, which shows the correctness of the algorithm. Compared with the existing elastomer method, the computational time of fluid-solid coupling is reduced by 65.5%. The flutter problem of Wing 445.6 model is analyzed. The flutter boundary is in good agreement with the experimental data, and the calculation time can be reduced by 54.8 compared with the existing elastomer method.
【作者單位】: 西安交通大學(xué)機(jī)械結(jié)構(gòu)強(qiáng)度與振動國家重點(diǎn)實驗室;西安交通大學(xué)航天航空學(xué)院;國家電網(wǎng)浙江北侖第一發(fā)電有限責(zé)任公司;
【基金】:國家自然科學(xué)基金資助項目(51275385)
【分類號】:O353.4
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