Full
Outline
To address the problem of pipe flow-induced vibration caused by orifice plates, an efficient prediction method is proposed. Based on the idea of the separation solution, combined with the detailed simulation of the time-domain fluctuating pressure of the pipeline using Computational Fluid Dynamics, the time-domain excitation load is mapped through segmented integration and Fourier transformation into the frequency domain. Subsequently, the vibration response is rapidly predicted in the finite element model based on the beam theory. Compared with the three-dimensional model, it is shown that this method significantly reduces the simulation time while maintaining the calculation accuracy. The comparison with the experimental results shows that this method can accurately predict the flow-induced vibration characteristics of the orifice plate. By leveraging the efficient computing advantage of this method, the excitation source is divided into the upstream high-pressure area, the local disturbance area of the orifice plate, and the downstream strong vortex area for qualitative analysis. The results indicate that the axial force at the orifice plate end face and the circumferential force in the strong vortex area are the main excitation sources, and the other loads can be approximately ignored. The proposed method has strong universality and is applicable for the rapid prediction and design evaluation of the orifice plate structure in pipeline systems, and can also be extended to other types of pipeline accessories.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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