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How Does Vibration Isolator Affect Marine Double-Layer Gearbox Case? A Dynamic Response Analysis
Journal of Vibration Engineering & Technologies ( IF 2.7 ) Pub Date : 2021-07-29 , DOI: 10.1007/s42417-021-00354-2
Jie Yang 1 , Rupeng Zhu 1 , Guanghao Dai 2 , Yanjiong Yue 2 , Xunmin Yin 2
Affiliation  

Purpose

This study attempts to propose an internal vibration isolation technology applied to the marine gearbox by exploring the impact of vibration isolators on the vibration response of gearbox case.

Methods

The spring element COMBIN14 of ANSYS software is used to simulate the vibration isolators installed between the inner and outer shells of the marine double-layer gearbox case. The modal of the marine double-layer gearbox case is calculated by the Lanczos method. The structural vibration responses of two gearbox cases are calculated by the modal superposition method. The effect of the vibration isolator on the gearbox case is evaluated by the vibration acceleration and acceleration-vibration level difference.

Results

The first six modal vibration modes of the double-layer gearbox case are inner shell vibration. The vibration acceleration of the double-layer gearbox case on the outer shell is less than that of the single-layer gearbox case. The vibration acceleration is positively correlated with the vibration-isolator number on the outer shell. The vibration reduction performance of the double-layer gearbox case decreases with the increase of the vibration-isolator stiffness when the stiffness is in the range of 1.0 × 107–1.5 × 109 N/m. The acceleration-vibration level of the double-layer gearbox case is negatively associated with the number and stiffness of vibration isolators.

Conclusions

The vibration isolator plays an important role in the vibration reduction of the marine gearbox. The performance of the vibration isolator would be weakened as the number and stiffness of vibration isolators increase.



中文翻译:

隔振器如何影响船用双层齿轮箱?动态响应分析

目的

本研究试图通过探索隔振器对齿轮箱振动响应的影响,提出一种应用于船用齿轮箱的内部隔振技术。

方法

ANSYS软件中的弹簧单元COMBIN 14用于模拟安装在船用双层齿轮箱内外壳之间的隔振器。船用双层齿轮箱的模态采用Lanczos方法计算。采用模态叠加法计算两个齿轮箱的结构振动响应。隔振器对变速箱壳体的影响通过振动加速度和加速度-振动级差来评估。

结果

双层变速箱壳体的前六种模态振动模式为内壳振动。外壳上双层齿轮箱的振动加速度小于单层齿轮箱的振动加速度。振动加速度与外壳上的隔振器数量呈正相关。当隔振器刚度在1.0×10 7 –1.5×10 9  N/m范围内时,双层齿轮箱的减振性能随着隔振器刚度的增加而降低。双层齿轮箱的加速度-振动水平与隔振器的数量和刚度呈负相关。

结论

隔振器在船用齿轮箱的减振中起着重要作用。隔振器的性能会随着隔振器数量和刚度的增加而减弱。

更新日期:2021-07-30
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