热力透平2026，Vol.55Issue(3)：198-203,6.DOI:10.13707/j.cnki.31-1922/th.2026.03.005
基于离散经验插值方法的高温部件非线性热力降阶计算
Reduced-Order Nonlinear Thermo-Mechanical Calculation of High-Temperature Components Based on the Discrete Empirical Interpolation Method
摘要
Abstract
In high-temperature environments,thermodynamic components of steam turbines exhibit strong nonlinear mechanical behavior.Traditional full-order finite element models require over 10 minutes per step,failing to meet the engineering demands for rapid assessment.To address this issue,a physics-driven reduced-order modeling(ROM)method based on discrete empirical interpolation method(DEIM)is proposed for efficient prediction of transient thermo-mechanical behavior of high-temperature rotors and valve components.In this method,both governing physical equations and discretization schemes are inherited directly from the full-order model.Furthermore,a key element search strategy tailored for complex geometric domains is developed.By assembling a small set of representative elements,the stiffness matrix is effectively reduced,enabling rapid calculation of physical fields and establishing a reduced-order model specifically applicable to rotors and valve components working in high temperature.Transient thermo-mechanical analysis demonstrates that the physical field caltulation results from reduced-order model are in excellent agreement with those of full-order model.Meanwhile,the calculation time per step is compressed from over 10 minutes in full-order model to the second level,achieving a speedup of more than two orders of magnitude.This validates that the proposed method significantly improves calculation efficiency while maintaining high accuracy.关键词
高温部件/非线性热力行为/降阶模型/离散经验插值Key words
high-temperature components/nonlinear thermo-mechanical behavior/reduced-order model/discrete empirical interpolation method分类
能源科技引用本文复制引用
叶兴柱,朱斌,康明..基于离散经验插值方法的高温部件非线性热力降阶计算[J].热力透平,2026,55(3):198-203,6.基金项目
国家重点研发计划项目(2024YFB4105000) （2024YFB4105000）
