热力耦合作用下熔盐储罐的力学性能评估及加强筋布置方案研究

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关键词：熔盐储罐；热力耦合；热变形；加强筋布置

中图分类号：TK513.5文献标志码：A

DOI：10.7652/xjtuxb202510012 文章编号：0253-987X（2025）10-0126-11

Mechanical Performance Evaluation of Molten Salt Storage Tanks under Thermo-Mechanical Coupling Effects and Research on Stiffener Arrangement Schemes

REN Bo，TIAN Jiaming，LI Biao，LU Yongwei，WANG Yueshe （State Key Laboratoryof Multiphase Flow in Power Engineering，Xi'an Jiaotong University，Xi'an 71o049，China）

Abstract： To address the stress concentration issues in molten salt storage tank walls caused by liquid level variations and temperature fluctuations during operation， structural evaluation and optimization research are conducted under thermo-mechanical coupling effects. First，a thermomechanical coupling model of the molten salt storage tank is established using a finite volumefinite element coupled method. Multi-physics simulations are employed to analyze the distribution characteristics of the temperature field，stress field，and deformation field in the tank wall under different liquid level conditions. Subsequently，key failure risk areas are identified based on simulation results. Finally，targeted optimization schemes are proposed， and their effectiveness is validated. Simulation results indicate that liquid level changes lead to significant temperature stratification in the tank，with a maximum temperature difference of 8∘C in the tank wall. Under thermo-mechanical coupling effects， the wall stress increases with rising liquid levels， peaking at 105MPa ， primarily concentrated in the first and second layers of the tank wall. The dome area exhibits the most pronounced deformation due to minimal thermal expansion constraints，with a maximum deformation of 0.16m ，while other regions of the tank wall require thermal deformation freedom to avoid additional stresses. By locally arranging stiffeners to optimize the structural design，the stress at critical points is reduced by 38% ，effectively improving the mechanical performance of the structure. This research provides theoretical support for the design optimization and safe operation of molten salt storage tanks.

Keywords： molten salt storage tank; thermo-mechanical coupling;thermal deformation; stiffener arrangement

在太阳能光热发电系统中，熔盐储罐作为关键储热设备，承担着储存和释放热能的重要任务，其性能直接影响整个系统的稳定性和经济性。（剩余14535字）