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$\sqrt{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。
At present, the vibration isolation treatment for electric propulsion equipment of large surface ships is relatively 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 frequency is $\sqrt{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 vibration isolators in this position can improve the vibration isolation performance.
2024,46(16): 102-108 收稿日期：2022-10-27
DOI：10.3404/j.issn.1672-7649.2024.16.016
分类号：U664.2
基金项目：国家科技重大专项资助项目（2017-IV-0006-0043）；国家自然科学基金重点基金资助项目（51839005）
作者简介：高逸芝（1996 – ），男，硕士研究生，研究方向为船舶动力装置性能分析及振动噪声控制等
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