弧形橡胶挠性接管轴向刚度特性分析  

Axial stiffness characteristics of arc rubber expansion joints

作　　者：徐国敏 何琳[1,2] 帅长庚[1,2] XU Guo-min;HE Lin;SHUAI Chang-geng(Inst. of Noise and Vibration, Naval Univ. of Engineering, Wuhan 430033, China;National Key Laboratory on Ship Vibration and Noise, Wuhan 430033, China)

机构地区：[1]海军工程大学振动与噪声研究所,武汉430033 [2]海军工程大学船舶振动噪声重点实验室,武汉430033

出　　处：《海军工程大学学报》2021年第4期107-112,共6页Journal of Naval University of Engineering

摘　　要：弧形橡胶挠性接管广泛应用于船舶管路系统中,起到补偿管路相对位移及减振降噪的作用。降低挠性接管刚度有利于提高其隔振能力,然而目前关于挠性接管刚度的研究还较少。因此,基于层合薄壳理论,考虑管体各向异性弹性常数的非线性分布情况,研究了管体轴向刚度特性。刚度理论计算结果与样机刚度试验结果吻合较好,验证了理论模型的准确性。分析发现:挠性接管通径、轴向长度、管体弯曲半径以及帘布初始缠绕角对刚度影响较大;基于提出的刚度模型,在不增加挠性接管占用空间的前提下,通过优化管体弯曲半径以及帘线缠绕角,可使挠性接管轴向刚度显著降低。理论模型以及分析结果将为后续多种规格的挠性接管低刚度优化设计提供指导。Arc rubber expansion joints are widely used in marine pipeline systems to compensate relative displacement and suppress the vibration.The performance of vibration suppression can be improved by decreasing the stiffness of rubber expansion joints.However,the research on the stiffness is limited.The axial stiffness was investigated based on laminated shell theory,considering the nonlinear distribution of the anisotropy of the flexible section in the model.The theoretical results of the axial stiffness were verified by the experiments of the prototypes,ensuring the accuracy of the theoretical model.The results show that stiffness is mainly influenced by the inner diameter,axial length,meridional radius and initial winding angle of the cords.With the constraints of space,the axial stiffness is decreased significantly with optimal meridional radius and initial winding angle based on the proposed stiffness model.The theoretical model and investigation results will provide guidance for stiffness optimization of more rubber expansion joints in the future.

关 键 词：橡胶挠性接管 层合壳理论 轴向刚度 缠绕角 

分 类 号：TB532[理学—物理]