Full
Outline
To study the vibration characteristics when the steel flow channel of the pumping station interacts with unsteady turbulence, this article establishes a fully coupled vibration analysis model of pump room-pump-water system with steel flow channel using ADINA software. The law of fluid pressure pulsation in the entire flow channel is studied. The time history and frequency spectrum characteristics of the vibration displacement of the steel flow channel structure are analyzed. The results show that fluid pressure pulsation in the steel flow channel is generated at the impeller and transmitted to the inlet and outlet channels, respectively. The vibration characteristics of the steel flow channel structure are similar to the pressure pulsation of the fluid, indicating that the vibration of the steel flow channel is mainly affected by the interaction between the water pressure pulsation caused by the rotation of the impeller and the pipe wall of the flow channel.
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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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