充液流动管道低频带隙特性与振动控制

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关键词：充液管道；Timoshenko梁；局域共振带隙；振动控制 中图分类号：0327；0328 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202506003

Low-frequency bandgap characteristics and vibration control of fluid-conveying pipelines

LIU Mingli'， XIAO Wenyu²， LUO Yu³， LUO Aochen³，WANG Xinyang'， GONGLingyun，CHENXingwen²，GAO Penglin，QU Yegao3 （1.Shandong Nuclear Power Co.，Ltd.，Yantai 265116，China; 2.Shanghai Nuclear Engineering Research&Design Institute Co.，Ltd.，Shanghai 20o233，China; 3.State KeyLaboratoryofMechanical Systemand Vibration，Shanghai Jiao Tong University，Shanghai2oo240，China）

Abstract：Toaddressthedemandforlow-frequencybroadbandvibrationcontrolinindustialfluid-conveyingpipelines，thisstudy investigatesthebandgaparactestisandtuningmetodsofcallesoantpipesundediferentfoelocities.Adynamicodeloffluid conveyingpipesisdevelopedbasedontheTimoshenkobeamtheoryandplugflowmodel，incorporatingrotatioalinertia，fluid-induced forces，andmulti-egreof-fredomresoators.UsingBlochbandteory，theinflueesoflowvelocity，esonatorcofiguratioand dampingparametersolocallesoantadgapsaresystematicallyanalydTeesultsdmonstratetatfuid-structurecouplgftste bandgapboundaryfrequeniestowardlowerfrequencies.As tefowvelocityicreases，thedampingdisipationefectinducedbythefluidis enanced，signiatlysuppsingesoaesposesartedgap.Furtheoesistisiofthesralefao anddampingofrsonatorscansubstantiallyboadnthvbratioateuationbandwidth.Foratwodegreeof-frdomparalelsoator （dampingratic Δ=0.15 ），optimized design reduces the resonance peak transmissibility of the pipe by more than 30dB within the frequency range of 200～2000Hz comparedtouncontroled pipes.These findings providetheoretical design guidelinesforlow-frequencybroadband vibration control in fluid-conveying pipelines for nuclear power，petrochemical，and related industries.

Keywords： fluid-conveying pipeline; Timoshenko beam; locally resonant bandgap;vibration control

输流管道被广泛应用于核电、能源化工和航空航天等工业领域[1-3]，在动力装置和流体等复杂多源激励作用下，充液管道在长寿命周期内要承受严酷复杂的流-固耦合振动，可能诱发结构疲劳失效，导致灾难性事故并造成重大的人员财产损失[4]。（剩余14279字）