| 燃料棒束格架不同尺寸条带流致振动实验研究 |
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| 引用本文： | 张波涛,朱晔晨,龚圣捷,顾汉洋.燃料棒束格架不同尺寸条带流致振动实验研究[J].核动力工程,2019,40(5):192-196. |
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| 作者姓名： | 张波涛 朱晔晨 龚圣捷 顾汉洋 |
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| 作者单位： | 上海交通大学核科学与工程学院,上海,200240;上海交通大学核科学与工程学院,上海,200240;上海交通大学核科学与工程学院,上海,200240;上海交通大学核科学与工程学院,上海,200240 |
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| 摘 要： | 为了深入认识燃料棒束格架条带流致振动特性，本文采用各种不同尺寸的平直条带进行流致振动实验研究，并获得了条带的流致振动特性。在实验研究范围内，条带的振动响应分为湍流激振与涡激振动2部分。湍流激振响应以条带的一阶模态为主，且条带湍流激振响应随流速的增加而增大。对于涡激振动，实验测得的St数范围在0.2~0.25之间；通过对实验数据进行分析，观察到了锁频现象。对于同一条带，低阶模态锁频范围比高阶的大；对不同厚度条带，随着厚度的增加，同阶模态锁频范围逐渐变小；对不同长度条带，长条带的同阶模态锁频范围比短条带的大。
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| 关 键 词： | 条带 流致振动 涡激振动 湍流激振 |
Experimental Study on Flow Induced Vibration of Different Size Strips of Fuel Rod Bundles |
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| Abstract: | To thoroughly study the vibration characteristics of the grid strip of fuel rod bundles, experimental study on flow induced vibration of different size flat strips was conducted, and the vibration characteristics of the strips were acquired. Within the range of experimental tests, the vibration response of the strips could be divided into two parts: turbulence induced vibration and vortex induced vibration. The predominant vibration response induced by turbulence was the first mode of the strips, and the response was amplified with the increasing of the flow velocity. For vortex induced vibration, the St number was from 0.2 to 0.25 in this study, and the lock-in phenomenon was observed. For a strip, the lock-in range of the lower modes was larger than the higher modes. For different thickness strips, the lock-in range of the same modes narrowed down with the increasing of the thickness. For different length strips, the lock-in range of the long strips was larger than that of the short strips of the same modes. |
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