双电机推进轴系隔振方案及传递特性研究
Research on vibration isolation scheme and transmission characteristics of double motor propulsion shafting
高逸芝 1周瑞平 1沈理姣2
作者信息
- 1. 武汉理工大学船海与能源动力工程学院,湖北武汉 430063
- 2. 中国舰船设计研究中心,湖北武汉 430070
- 折叠
摘要
目前对大型水面舰船电力推进装置进行隔振处理的还比较少见.为研究某大型舰船双电机推进轴系在螺旋桨激励下的传递特性和隔振方案,提出一种考虑轴承阻尼作用的有限元混合模型建立方法,给出6种隔振方案,利用Ansys软件对整个轴系进行模态和谐响应分析计算.以平均振级落差作为评价标准,验证方案的可行性.结果表明:激励力频率比系统的固有频率大√2倍时,在一定范围内,总静刚度越小隔振性能越强;在总静刚度相等的情况下,采用单个静刚度更大、数量更少的隔振器可以达到几乎相同的隔振效果;该轴系优势模态的变形集中在机组轴向前后两端的位置,增加该位置的隔振器数量可以提高隔振性能.
Abstract
At present,the vibration isolation treatment for electric propulsion equipment of large surface ships is relat-ively rare.In order to study the vertical transmission characteristics and vibration isolation scheme of a large ship's double motor propulsion shafting under propeller excitation,this paper proposes a finite element hybrid model construction method considering bearing damping effect,and gives six vibration isolation schemes.Taking the average vibration level drop as the evaluation criterion,the feasibility of the scheme is verified,and the conclusion is drawn:when the excitation force fre-quency is √2 times larger than the natural frequency of the system,the vibration isolation performance is stronger with the total static stiffness in a certain range.When the total static stiffness is equal,using a single vibration isolator with greater static stiffness and fewer numbers can achieve almost the same vibration isolation effect.The deformation of the dominant mode of the shafting is concentrated in the position of the front and back ends of the unit shaft,increasing the number of vi-bration isolators in this position can improve the vibration isolation performance.
关键词
大型设备/双电机/螺旋桨激励力/隔振/有限元分析Key words
large equipment/double motor/transverse vibration/vibration isolation/finite element analysis引用本文复制引用
基金项目
国家科技重大专项(2017-IV-0006-0043)
国家自然科学基金重点项目(51839005)
出版年
2024
NETL
NSTL
万方数据