华中科技大学学报（自然科学版）2025，Vol.53Issue(4)：22-29,8.DOI:10.13245/j.hust.250041
基于局部动柔度的载流管路固有频率优化配置
Receptance-based optimal assignment of natural frequencies for fluid-conveying pipeline
摘要
Abstract
To solve the resonance problem in the industrial fluid-conveying pipeline,a new assignment method of the natural frequencies of the pipeline system was proposed by modifying the stiffness of elastic support.This method directly used the frequency response functions(FRFs)at local positions of the pipeline to establish the objective function for the optimal assignment of natural frequencies.The optimal stiffness of the elastic supports was then determined by solving the optimization problem using a multi-objective genetic algorithm.Compared with the traditional optimization methods of natural frequency,the proposed method do not need to establish a simulation model of the fluid-conveying pipeline but only requires a small number of measured frequency response functions(FRFs)as input data to calculate the optimal stiffness.This method avoids the modeling errors of numerical models and the mathematical operations of large-scale matrices,leading to less computation time and higher accuracy of results.Moreover,a method for selecting supports to participate in stiffness modification was provided based on sensitivity analysis,which could help determine the minimum number of elastic supports required to optimize the natural frequency of the pipeline.Taking an L-shaped fluid-carrying pipeline as an example,the proposed method from both numerical and experimental perspectives was verified.Results show that the proposed method can accurately realize the optimal configuration of the first three natural frequencies of L-shaped pipelines,and the calculation cost is only 1.2%of that of the traditional method.关键词
载流管路/固有频率/优化配置/动柔度/灵敏度分析Key words
fluid-conveying pipeline/natural frequency/optimal assignment/receptance/sensitivity analysis分类
机械工程引用本文复制引用
张琳,陈乐佳,邓海华,李天匀..基于局部动柔度的载流管路固有频率优化配置[J].华中科技大学学报（自然科学版）,2025,53(4):22-29,8.基金项目
国家自然科学基金资助项目(52371318) （52371318）
汉江实验室重点支撑项目(ZC2023003) （ZC2023003）
汉江实验室前沿探索基金资助项目(TS2024005). （TS2024005）
