水润滑橡胶合金轴承振动噪声分析与实验研究

发布时间：2018-01-04 22:27

本文关键词：水润滑橡胶合金轴承振动噪声分析与实验研究　出处：《重庆大学》2012年硕士论文　论文类型：学位论文

【摘要】：水润滑橡胶合金轴承是一种能减振、降噪、耐磨的新型轴承。在低速、重载条件下，水润滑橡胶合金轴承难易形成弹性流体动压润滑，而处于边界润滑甚至干摩擦状态，极易产生振动噪声。轴承的振动噪声关系到舰船的安全性和舒适性，，因此引起了研究者高度重视。本课题来源于国家自然科学基金面上项目“大尺寸高比压水润滑橡胶合金轴承的创新设计理论与方法”（项目编号：50775230），旨在研究不同速度与载荷下水润滑橡胶合金轴承的振动噪声，掌握轴承的结构设计参数、载荷、转速等与水润滑轴承振动噪声的关系，这不仅有助于优化水润滑橡胶合金轴承的结构，还对降低辐射噪声、提高舰船的隐蔽性具有重要的意义。本文利用ANSYS有限元分析软件，首先对水润滑橡胶合金轴承的约束模态进行了分析，得出了轴承的固有频率及在各阶模态下的振动特性，又通过静力学分析，讨论了轴承在集中负载作用下的应变和应力情况。然后对轴承做了复模态理论分析，得出轴承出现不稳定时的模态以及在不稳定模态时的频率，并讨论分析了不同的结构和工况对振动噪声的影响。最后，通过实验，测试轴承的振动加速度，并将振动数据压缩到1/3倍频带，得到每个频带内的结构噪声，并改变转速和负载重复实验。实验最终验证了复模态分析结果，实验结果与复模态分析结果比较接近，这说明本文所利用的复模态计算方法和结果是合理的，为轴承的设计与使用提供了重要的参考价值。
[Abstract]:The water - lubricated rubber alloy bearing is a kind of new kind of bearing which can absorb vibration , reduce noise and wear resistance . Under the condition of low speed and heavy load , the water - lubricated rubber alloy bearing is difficult to form elastic fluid dynamic pressure lubrication . It is very easy to produce vibration noise . The vibration noise of bearing is related to the vibration noise of water lubricated rubber alloy bearing . It can not only help to optimize the structure of the water - lubricated rubber alloy bearing , but also to reduce the radiation noise and improve the concealment of the ship . In this paper , using ANSYS finite element analysis software , firstly , the constraint mode of water - lubricated rubber alloy bearing is analyzed , the natural frequency of the bearing and the vibration characteristics of the bearing under concentrated load are obtained . Through the static analysis , the strain and stress conditions of the bearing under concentrated load are discussed . Then , the modal of the bearing in unstable mode and the frequency in unstable mode are obtained . The influence of different structure and working condition on vibration noise is discussed . Finally , through the experiment , the vibration acceleration of the bearing is tested and the vibration data is compressed to the 1 / 3 times frequency band to obtain the structural noise in each frequency band , and the rotating speed and the load repetition experiment are changed . The experiment finally validates the complex modal analysis result , and the experimental result is close to the complex modal analysis result , which indicates that the complex modal calculation method and the result are reasonable , which provides an important reference value for the design and use of the bearing .

【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.3;TB535.1

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