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The requirements of over limit evaluation and measuring points layout of vibration/swing in hydropower units in industry standards and national standards are compared. The layout of vibration/swing measurement points on the project site is also described. It is found that the standards related to evaluation and the ones related to measuring points arrangement are inconsistent or unclear with the engineering site, such as vibration evaluation boundary conditions, evaluation criteria, evaluation working conditions and measuring points arrangement. Analysis shows that all the differences between the standards appear in vibration evaluation and measuring points arrangement for fixed parts, and the provisions on radial vibration (swing) of the unit shafting are relatively unified. Inconsistencies in all standards are not conducive to broad-spectrum application, and are prone to ambiguity and disagreement. The phenomenon that the evaluation standard is inconsistent with the measuring points standard, is not conducive to on-site comprehensive vibration evaluation of large or giant units. All the standard evaluation criteria lack the consideration of weight coefficient of amplitude exceeding the limit and cumulative duration, which is not conducive to the development of vibration fault and condition based maintenance, and data accumulation in the new role of hydropower units. The conclusion is expected to provide analytical help and reference for the practitioners of vibration standard compilation, installation and acceptance, operation management and scientific research and test of hydropower units.
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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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