发电机传感器支架共振分析及拓扑优化方法研究.pdfVIP

电力系统装备运行与维护2025年第6期

ElectricPowerSystemEquipmentOperationAndMaintenance2025No.6

发电机传感器支架共振分析及拓扑优化方法研究

吴骞，王超，周帅

（苏州热工研究院有限公司，江苏苏州215004）

［摘要］为解决某电厂汽轮发电机组9号轴承垂直方向在线振动上涨问题，研究通过多维度技术手段开展系统

性分析，确认振动上涨的根本原因为传感器支架固有频率与机组转频高次谐波耦合导致的结构共振，并提出了基

于拓扑优化的支架结构改进方案，使支架的固有频率避开机组转频高次谐波。改进后在线振动降幅达70%，问题

得到有效解决。研究融合频谱分析、模态分析与结构拓扑优化等技术手段，揭示了发电机在线振动上涨与传感器

支架动力学特性的关联机制，为同类工程问题提供了可复用的故障诊断范本及结构优化方法论。

［关键词］结构共振；模态分析；拓扑优化

［中图分类号］TM623［文献标志码］A［文章编号］1001–523X（2025）06–0129–04

ResearchonResonanceAnalysisandTopologyOptimization

MethodofGeneratorSensorBracket

WUQian，WANGChao，ZHOUShuai

Abstract

［］Inordertosolvetheproblemofverticalonlinevibrationriseofthe9thbearingofasteamturbine

generatorunitinacertainpowerplant,thisstudyconductedasystematicanalysisthroughmultidimensionaltechnical

means,andconfirmedthatthefundamentalreasonforthevibrationriseisthestructuralresonancecausedbythecoupling

betweenthenaturalfrequencyofthesensorbracketandthehigh-orderharmonicsoftheunitrotationfrequency.Atopology

optimizationbasedbracketstructureimprovementschemewasproposedtoavoidthehigh-orderharmonicsoftheunit

rotationfrequencyinthenaturalfrequencyofthebracket.Afterimprovement,theonlinevibrationreductionreached70%,

andtheproblemwaseffectivelysolved.Thisstudyintegratestechniquessuchasspectrumanalysis,modalanalysis,and

structuraltopologyoptimizationtorevealthecorrelationmechanismbetweentheonlinevibrationriseofgeneratorsand

thedynamiccharacteristicsofsensorsupports,providingareusablefaultdiagnosistemplateandstructuraloptimization

methodologyforsimilarengine