基于颗粒阻尼技术的海洋平台桁架结构振动特性研究  

Vibration performance of offshore platform truss structures with particle damping

作　　者：夏兆旺[1] 茅凯杰 薛程 邵广申 方媛媛[1] XIA Zhaowang;MAO Kaijie;XUE Cheng;SHAO Guangshen;FANG Yuanyuan(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学能源与动力工程学院,镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2018年第1期46-50,共5页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(11302088);江苏省自然科学基金资助项目(BK2012278);江苏省高校自然科学基金资助项目(16KJB580002)

摘　　要：针对海洋平台桁架结构长期处于强紫外线的工作环境,传统的粘弹性阻尼减振方法存在易老化等问题,提出将颗粒阻尼技术应用于海洋平台桁架结构的减振.使用NASTRAN建立桁架结构的有限元模型,基于离散元法建立颗粒阻尼器模型,分析颗粒填充率、颗粒直径和密度等参数对减振效果的影响规律,研究结果表明:带颗粒阻尼器的海洋平台桁架结构振动特性曲线与试验数据误吻合良好,能满足工程计算精度要求;颗粒阻尼能在较大频带内有效降低海洋平台桁架结构振动.仿真模型可用于指导带颗粒阻尼器桁架结构的关键参数设计与性能预测,为海洋平台桁架结构的减振提供了一种新的思路.Particle dampers still have good damping effect in harsh environments when other passive damping failed.A coupling simulation algorithm based on the discrete element method and finite element method is used to calculate and design the offshore platform truss structure with particle damper.The research results show that the simulation results agree well with the experimental result and the particle damper can reduce the vibration in large frequency range.These studies have important theoretical significance and value of engineering,promoting the engineering application of the offshore platform truss structure with particle damper in the field of vibration reduction.

关 键 词：桁架 减振 颗粒阻尼 振动特性 

分 类 号：O328[理学—一般力学与力学基础] TB535.1[理学—力学]