| 摘要: |
| 取排水工程是滨海电厂的重要组成部分，随着近年我国核电建设逐渐向海岛扩展转移，开敞海域的波浪条件趋于复杂，波浪力逐渐成为影响排水构筑物安全的控制因素。通过波浪物理模型试验，对钢盖帽式变截面排水立管结构正向力、横向力和上托力进行同步量测，分析了变截面排水立管结构受力的时域变化特征，研究了水体排放、淹没深度对其受力的影响，建立了变截面排水立管结构正向力和横向力计算方法。研究表明，钢盖帽式变截面排水立管结构上托力与正向力和横向力峰值之间存在约为π/2的相位差，此相位差并不受排水的影响；水体排放可导致排水立管结构上托力的显著增大，最大相对上托力出现于相对淹没深度为0.013附近。通过引入透空率折减系数可实现对透空结构波浪力的计算，计算误差在4%以内。本文建立的变截面透空排水立管结构波浪力计算方法可为今后同类工程设计和数值模拟提供借鉴与验证。 |
| 关键词: 滨海电厂 变截面排水立管 波浪力 模型试验 |
| DOI： |
| 分类号:TV139.2 |
| 基金项目:国家重点研发计划资助(2022YFC3204304); 福建省交通运输科技项目（JC202311）；南京水利科学研究院中央级公益性科研院所基本科研业务费专项资金项目（Y224004） |
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| Experimental study on wave force of variable-section permeable drainage structure |
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He Tao1, Gan Tong chang2, Tang Ben jing3, liu qing jun4
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1.China Railway Siyuan Survey and Design Group Co., Ltd;2.CNNP Guodian Zhangzhou Eneragy Co.,Ltd.,;3.China Nuclear Power Engineering Corporation Limited;4.Nanjing Hydraulic Research Institute
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| Abstract: |
| Drainage engineering is an important part of coastal power plants. With the gradual expansion and transfer of nuclear power construction to islands in China in recent years, the wave conditions in the open sea become more complicated, and the wave force gradually becomes the control factor affecting the safety of drainage structures. Through the wave physical model test, the forward force, lateral force and upward force of the steel cap type drainage riser structure were measured synchronously. The time domain variation characteristics of the structure were analyzed, and the influence of water discharge and submerged depth on the force was studied. The calculation methods of the forward force and lateral force of the structure were given. The results show that there is a phase difference of about π/2 between the lifting force, the peak value of the forward force and the peak value of the lateral force on the steel cap type variable section drainage riser structure, which is not affected by the drainage. Water discharge can lead to a significant increase in the lifting force on the riser structure, and the maximum relative lifting force appears near the relative submerged depth of 0.013. The wave force of permeable structure can be calculated by introducing the reduction coefficient of permeable rate into Morison equation, and the calculation error is less than 4%. The wave force calculation method established in this paper can provide reference and verification for similar engineering design and numerical simulation in the future. |
| Key words: Coastal power plant Vertical drainage pipe with variable section Wave force Model test |
