集中质量对耦合索股自振特性及索力测试的影响  

Research on the Coupled Vibrational Characteristics of Concentrated Mass Suspension Cables and Tension Testing

作　　者：张伟华 马万里 张卓杰 ZHANG Weihua;MA Wanli;ZHANG Zhuojie(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,河北石家庄050043 [3]河北省风工程和风能利用工程技术创新中心,河北石家庄050043

出　　处：《石家庄铁道大学学报(自然科学版)》2025年第1期1-7,83,共8页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(52178138,51908382);石家庄铁道大学研究生创新资助项目(YC2023067);中央引导地方科技发展资金项目(246Z5409G)。

摘　　要：现有研究常将缆索视作质量均匀分布的柔性构件,但实际工程中也存在大量带集中质量的单索或多索结构。为研究集中质量对此类结构自振特性的影响以及振动频率法对于此类结构索力识别的适用性,首先,构建了带集中质量的耦合索股结构的力学模型,通过理论推导得到了结构的频率方程;然后,通过振动试验和有限元仿真分析对理论推导的正确性进行了验证;最后,考察了集中质量对系统自振特性的影响,并对振动频率法测试此类结构索力的适用性进行了探讨。研究结果表明,集中质量的大小和作用位置会影响索结构自振频率;对于集中质量耦合的多索结构,结构振动特性既具有独立性又具有耦联性;在实际工程中,可以通过作用位置确定偏差最大值出现的主振阶次,通过质量大小确定偏差幅值,控制偏差值满足工程需求后,可直接用振动频率法进行计算。In existing research,cables are often considered as flexible components with uniformly distributed mass,but in actual engineering,there are also many single or multi-cable structures with concentrated masses.To study the impact of concentrated masses on the natural vibration characteristics of such structures and the applicability of the vibration frequency method for identifying cable forces in these structures,a mechanical model of a coupled cable structure with concentrated masses was first constructed.The frequency equation of the structure was derived through theoretical calculations.Then,vibration tests and finite element simulation analyses were conducted to verify the correctness of the theoretical derivation.Finally,the impact of concentrated masses on the natural vibration characteristics of the system was investigated,and the applicability of the vibration frequency method for measuring cable forces in such structures was discussed.The research results show that the natural vibration frequency of the cable structure is influenced by the concentration mass and its position.For multi-cable structures coupled with concentrated masses,the structural vibration characteristics exhibit both independence and coupling.In actual engineering,the main vibration order where the maximum deviation occurs can be determined by the position of the concentrated mass,and the deviation amplitude can be determined by the mass size.After controlling the deviation to meet engineering requirements,the vibration frequency method can be directly used for calculations.

关 键 词：索股系统 集中质量 自振频率 振动频率法 

分 类 号：U441[建筑科学—桥梁与隧道工程]