| 梁超,张金良,练继建,刘昉.高坝泄流诱发事故闸门的爬行振动研究[J].水利学报,2018,49(12):1503-1511,1522 |
| 高坝泄流诱发事故闸门的爬行振动研究 |
| Research on slip-stick vibration of emergency gate induced by high dam flood discharge |
| 投稿时间：2018-08-23 |
| DOI：10.13243/j.cnki.slxb.20180769 |
| 中文关键词: 控制理论 事故闸门 无法落门 爬行振动 非线性摩擦特性 相平面图 |
| 英文关键词: control theory emergency gate incomplete closure of emergency gate slip-stick vibration non-linear friction characteristic phase plane |
| 基金项目:国家重点研发计划项目（2016YFC0401905）；国家自然科学基金项目（51569025，51579173，51779167）；黄河设计公司博士后研究开发项目（YREC-2018-PD01） |
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| 全文下载次数: 1931 |
| 中文摘要: |
| 事故闸门承担着上/下游发生事故时在动水中紧急落门，以封堵水流、防止事故扩大的重要任务，然而闸门无法完全落门并伴随爬行振动的工程问题屡屡发生，不仅导致无法封堵水流，在紧急情况下可能造成严重损失，而且使相关结构受到强烈的冲击荷载，对启闭设备及闸门的长期安全运行极为不利。从系统控制理论的基本观点出发，将由动/静摩擦力转换导致的非线性摩擦特性从闸门动水落门过程中剥离出来作为一个单独的环节，并合理选取被控量与参据量，构建了负反馈控制系统模型以描述上述工程问题。通过理论模型与工程问题互相印证、闸门爬振位移时程模拟和闭门持住力反演，表明理论模型是合理有效的。基于所提出的理论模型，阐明了闸门无法完全落门并伴随爬行振动工程问题的发生机制，为旨在避免上述工程问题的闸门改造方案提供了理论指导。 |
| 英文摘要: |
| The emergency gate is employed for emergency closure in flowing water to prevent the accident propagation. However, the frequent occurrence of emergency gate incomplete closure accompanying slip-stick vibration may cause serious loss, and lead to strong load on hydraulic structures. Based on con-trol theory, the nonlinear friction characteristics induced by static/dynamic friction conversion are separated from the gate closing process, and is regarded as an independent element in systematic structure diagram. Furthermore, by reasonably selecting the controlled variable and reference input, a negative feedback con-trol system model is established to describe the aforementioned engineering problem. The rationality and ef-fectiveness of the presented theoretical model is validated by comparing the theoretical results and actual conditions, simulating slip-stick vibration displacement, and reversely deducing the holding force. Accord-ing to the theory analysis,the generative mechanism of the engineering problem is clarified and the theoreti-cal guidance is provided for the gate optimization scheme. |
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