基于工况传递路径的旋转机械振动源分析

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摘要工况传递路径技术（OTPA）可以根据运行工况下的振动数据对故障进行溯源分析，该方法需要有大量不同工况下的运行数据，这对于航空发动机等很多旋转机械而言是不现实的。为解决运行工况数量不足问题，提出一种基于频响函数的工况传递路径分析方法。以航空发动机转子实验台为例，试验获取整机状态下激励点到轴承座和机匣测点的频响函数矩阵，将其作为OTPA模型的输入和输出，通过奇异值分解技术消除输入之间的串扰导致的矩阵病态，进而求出传递率矩阵。根据传递率系数确定机匣各部位对各轴承座的振动敏感度，根据振动贡献量确定机匣振动来源。在航空发动机双转子实验台上开展了试验研究，验证了该方法的可靠性。
关键词：振动；工况传递路径分析；频响函数；传递率矩阵；奇异值分解

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	马皋1
	陈亚明2
	沈德明3
	4
	杨建刚1
	谭平1

关键词 ：振动, 工况传递路径分析, 频响函数, 传递率矩阵, 奇异值分解

Abstract：Operational transfer path analysis (OTPA) is an effective method to find the vibration source. However, OTPA requires large amounts of data under operating conditions, which is unrealistic for many rotating machineries. To solve this problem, an OTPA method based on frequency response function (FRF) is proposed. Firstly, the FRFs in the complete machine state obtained by experiment are used to establish the OTPA model. Then, SVD is used to eliminate the crosstalk between different inputs. Finally, the vibration sensitivity of the casing is determined by transmission function, and the vibration source is determined by vibration contribution. The experimental research was carried out on the aero-engine test bench and the results verified the feasibility of the method.
Key Words：vibration；OTPA；frequency response function；transmissibility function；SVD

Key words： vibration OTPA frequency response function transmissibility function SVD

收稿日期: 2021-06-17 出版日期: 2022-09-15

引用本文:

马皋1，陈亚明2，沈德明3,4，杨建刚1，谭平1. 基于工况传递路径的旋转机械振动源分析[J]. 振动与冲击, 2022, 41(17): 276-281.
MA Gao1, CHEN Yaming2, SHEN Deming3,4, YANG Jiangang1, TAN Ping1. Vibration source analysis of rotating machinery based on working condition transmission path. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(17): 276-281.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I17/276

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