为探究流激振动对弧形闸门启闭力的影响,基于玛尔挡泄洪放空洞数值模型,对弧形工作闸门进行流固耦合分析,结果表明引起闸门振动的激振力和由闸门振动位移造成的摩擦系数和摩擦力臂的变化是影响启闭力的主要因素。在此基础上对闸门振动体系进行简化,以振动理论为基础,推导出振动过程中的闸门面板压力以及振动位移变化关系式,在考虑对摩擦系数和摩擦力臂的影响后,将其应用于闸门启闭力的计算中。通过与玛尔挡弧形闸门数值模拟结果对比,相比于规范推荐的公式,改进后的启闭力计算公式提高了计算精度,可为实际工程的启闭机容量的选择提供技术指导。
Abstract
Fluid-solid coupling analysis was conducted to investigate the influence of flow-induced vibration on the opening and closing force of radial gate with Maerdang project as a case study. Results revealed that the vibration force caused by gate vibration and the change of friction coefficient and friction arm caused by gate vibration displacement were major factors affecting the opening and closing force. On this basis, the vibration system of the gate is simplified. The formula of gate panel pressure varying with vibration displacement was also derived based on the vibration theory. The method was applied to the calculation of the opening and closing force of radial gate in consideration of the influence on friction coefficient and friction arm. Comparison with numerical simulation results demonstrates the improved calculation formula of the opening and closing force enhances the calculation accuracy than specification formula does. The research finding provides a basis for the selection of hoist capacity in practice.
关键词
流激振动 /
弧形闸门 /
振动水压力 /
点面转换 /
启闭力
Key words
flow-induced vibration /
radial gate /
vibrating water pressure /
point-to-face conversion /
opening and closing force
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] SL74—2013,水利水电工程钢闸门设计规范[S]. 北京: 中国水利水电出版社, 2013.
[2] 徐国宾,高仕赵,訾 娟.淤泥对平面钢闸门启门力影响的计算方法[J].水利学报,2012,43(9):1092-1096.
[3] MENON J,MUDGAL B V.Experimental Determination of Contraction Coefficient and Velocity Coefficient for Radial Gates with Elliptical Lips[J].Sadhana,2018,43(4):61.
[4] 张 冬, 张燎军, 陈 超, 等. 复杂水流条件下平面钢闸门启闭力数值计算方法探讨[C]//第四届全国水工抗震防灾学术交流会论文集.西安:中国水力发电工程学会,2013:165-169.
[5] REN H, LI T, ZHAO L, et al. Analysis on Flow-induced Vibration of Underwater Horizontal Gate[M]//Advances in Water Resources and Hydraulic Engineering. Heidelberg: Springer Berlin, 2009: 293-298.
[6] 严根华. 大跨度特型闸门流激振动及控振措施研究[J]. 水利与建筑工程学报, 2018, 16(5):5-15.
[7] ANAMI K, ISHII N, KNISELY C W, et al. Friction-maintained Dynamic Stability[M]//Proceedings of the 10th International Conference on Vibration Problems. Prague, Czech Republic. September 5-8, 2011:779-785.
[8] 胡康军,刘冰洁.表孔弧形闸门空载启闭异常振动原因试验研究[J].raybet体育在线
院报,2013,30(3):85-88,98.
[9] 徐建光,李长和,王延斌,等.表孔弧形闸门空载振动原型试验研究[J].水力发电学报,2004,23(3):88-92.
[10] 杨明镜. 露顶式钢闸门地震动水压力研究[D].杨凌:西北农林科技大学,2013.
[11] 潘锦江, 陈小涛. 浅谈闸门的振动问题[J]. 广东水利水电, 2001(2):6-8.
[12] 陈德欣. 从二则实例谈预防闸门事故[J]. 江西水利科技, 1990(4):87-90.
[13] 冯先明, 李玉芷. 子洪水库弧形闸门事故分析与处理[J]. 山西水利科技, 1999(1):65-67.
[14] 严根华,陈发展.溢流坝表孔弧形闸门流激振动原型观测研究[J].水力发电学报,2012,31(2):140-145.
[15] 赵清静,冷 云,高 扬.里底水电站溢洪道弧门水力学及水弹性振动试验研究[J].中国设备工程,2017(24):155-156.
[16] 郭桂祯,练继建.基于大涡模拟和Newmark HHT方法的闸门垂向自激振动数值模拟[J].水利水电技术,2013,44(1):40-44.
[17] 徐汉忠,吴旭光,马贞信.计算动水压力附加质量的韦氏公式的扩充[J].河海大学学报,1997(5):120-122.
[18] 张力霆,齐清兰.固体边壁上点面脉动压力转换的数学推导[J].数学的实践与认识,2003,33(10):78-84.
[19] 雷春江. 底流消能水跃区底板脉动压力及其点面转换研究[D].天津:天津大学,2007.
PDF(4123 KB)
