50 MW光热电站非锚固式高温熔盐储罐的模态分析

丁霄莉; 杜保存; 徐超; 雷勇刚

doi:10.19805/j.cnki.jcspe.2026.240717

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50 MW光热电站非锚固式高温熔盐储罐的模态分析

新能源与储能 | 更新时间：2026-10-10

- 50 MW光热电站非锚固式高温熔盐储罐的模态分析
- Modal Analysis of the Unanchored High-temperature Molten SaltStorage Tank for a 50 MW Concentrated Solar Power Plant
- 动力工程学报 2026年46卷第2期页码：133-138
- 作者机构：
  
  1. 太原理工大学土木工程学院,山西,太原,030024
  2. 华北电力大学能源动力与机械工程学院,北京,102206
- 作者简介：
  
  丁霄莉(1997—),女,山西运城人,硕士研究生,主要研究方向为储热结构安全评定
  杜保存(通信作者),男,副教授,博士,E-mail:ntdbc0724@163.com
- 基金信息：
  
  国家自然科学基金资助项目(51906172);山西省基础研究计划资助项目(202303021221021);山西省科技创新人才团队重点资助项目(202304051001011);山西省科技合作交流专项资助项目(202104041101027)
- DOI：10.19805/j.cnki.jcspe.2026.240717
  中图分类号：
- 网络首发：2026-02-10，
  
  纸质出版：2026-02-10
- 稿件说明：
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丁霄莉,杜保存,徐超,雷勇刚. 50 MW光热电站非锚固式高温熔盐储罐的模态分析动力工程学报, 2026, 46(2): 133-138 https://doi.

org/10.19805/j.cnki.jcspe.2026.240717
丁霄莉,杜保存,徐超,雷勇刚. 50 MW光热电站非锚固式高温熔盐储罐的模态分析动力工程学报, 2026, 46(2): 133-138 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240717.

org/10.19805/j.cnki.jcspe.2026.240717 DOI：

摘要

基于声-固耦合方法模拟分析了某商用50 MW塔式光热电站熔盐储罐的模态特性

研究了锚固方式对满液位熔盐储罐液晃特性的影响

并探讨了不同液位高度和运行温度等参数对非锚固熔盐储罐模态频率的影响。结果表明:满液位下非锚固熔盐储罐前3阶易出现刚体位移振型

且3~20阶的液晃频率与锚固罐相比差异显著

因此宜选用非锚固方式对熔盐储罐进行模态分析;不同液位下储罐的液晃频率随液位高度的升高而增大

且各阶液晃频率均低于空罐的固有频率

空罐自振周期在0.06~0.1 s

而液晃周期长达2~15 s

表明充盐状态下的储罐液晃频率在长周期地震波激励作用下极易发生共振现象;运行温度对熔盐的液晃频率影响不大

但预热温度对空罐的固有频率影响显著

运行温度升高100 K时空罐的最高阶固有频率仅降低2.5%

为避免预热状态下大容量熔盐罐体在高频地震波作用下产生失稳现象

实际工程中对熔盐储罐结构进行抗震设计时应考虑预热温度对空罐体频率的影响。

Abstract

Based on the acoustic-structural coupling method

the modal characteristics of a molten salt storage tank in a commercial 50 MW tower-type concentrated solar power (CSP) plant were simulated. The influence of anchoring methods on the sloshing characteristics of molten salt storage tanks under full liquid level conditions was investigated

and the effects of parameters such as different liquid levels and operating temperatures on the modal frequencies of unanchored molten salt storage tanks were explored. Results show that the first three orders of unanchored molten salt storage tanks under full liquid level are prone to rigid-body displacement modes

and the sloshing frequency values of the 3rd to 20th orders differ significantly from those of anchored tanks. Therefore

the unanchored configuration is more suitable for modal analysis of molten salt storage tanks. The sloshing frequency of the tank increases with the rise of liquid level under different liquid level conditions

and the sloshing frequency of each order is lower than the natural frequency of the empty tank. The natural vibration period of the empty tank ranges from 0.06-0.1 s

while the sloshing period is as long as 2-15 s

indicating that the sloshing frequency of the tank in the salt-filled state is highly susceptible to resonance under the excitation of long-period seismic waves. Operating temperature has little effect on the sloshing frequency of molten salt

but preheating temperature has a significant impact on the natural frequency of the empty tank. When the operating temperature increases by 100 K

the highest-order natural frequency of the empty tank only decreases by 2.5%. To avoid instability of large-capacity molten salt tanks under the action of high-frequency seismic waves in the preheated state

the influence of preheating temperature on the frequency of empty tanks should be taken into account in the seismic design of molten salt tank structures in practical engineering.

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references

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