扭振是柴油发电机组船检必不可少的检验项目之一，进行机组扭振计算可提早发现扭振问题，并为选配发电机和连接件提供参考。本文采用AVL-excite Designer软件针对某型柴油发电机组在使用盘片刚性连接方式下的扭振情况进行计算。按照钢质海船入级规范的扭振要求，详细分析柴油发电机组在正常工况和一缸熄火下的减振器角位移、曲轴最大扭转应力、发电机转子处的振动惯性扭矩、发电机转子合成振幅。计算结果均满足船级社要求，说明该型柴油机和发电机之间采用盘片刚性连接满足扭振要求。此外，本文提供的柴油发电机组计算评估方法对刚性连接下机组的扭振评估具有一定的通用性，可为其他机组计算提供参考。
Torsional vibration is one of the indispensable inspection items in ship inspection for diesel generating set. The vibration problems can be found earlier by calculating, and it can provide reference for selecting generators and connecting parts. Using AVL-excite Designer, the torsional vibration is calculated under rigid connection. According to the Regulations for the Classification of Sea Going Steel Ships, the angular displacement of the vibration damper, the maximum torsional stress of crankshaft, the vibration inertia torque of generator rotor are analyzed in detail under normal operating and one cylinder flameout. The simulation results conform to the requirements of the ship classification society. It shows that the rigid connection meets the requirements of torsional vibration. In addition, the calculation and evaluation method in this paper has certain universality for torsional vibration evaluation of sets under rigid connection, and can also provide reference for others.
2019,41(8): 98-102,126 收稿日期：2019-01-06
DOI：10.3404/j.issn.1672-7649.2019.08.019
分类号：U664.1
基金项目：技术基础科研项目（JSZL2017207B004）；洛阳市科技重大专项（1901017A）
作者简介：郑昊天(1989-),男,硕士研究生,助理工程师,主要从事柴油机运动件系统开发设计
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