燃气发生器导管传递路径分析.pdf

燃气发生器导管传递路径分析

邓长华李君周云端赵瑞国李锋
(西安航天动力研究所,西安 710100)

摘要:针对某型液体火箭发动机在试车过程中燃气发生器燃料进口弯管出现破裂的故障,以燃气发生器燃料导管为研究对象,
基于 LMS 软件中 Path Contribution Analysis 分析模块对导管进行了传递路径分析。文中采用彩条图法给出了不同
传递路径下、不同频率处故障位置的振动响应,为弯管破裂的故障分析以及改进方案的设计提供了理论依据。
关键词: 传递路径分析燃气发生器

Transfer Path Analysis for the Pipe of Gas
Generator
Changhua Deng, Jun Li, Yunduan Zhou, Ruiguo Zhao, Feng Li
(Xi’an Aerospace Propulsion Institute, Xi’an 710100, China)

Abstract: The pipe of the gas generator was cracked during the ground test for the liquid rocket engine. In order to investigate the
root cause of the fault, the transfer path analysis is presented based on the contribution analysis tools of the software LMS .
The color-bar images which describe the contribution virtually are used in the post processing. The modes and the path which
contribute the most to the response of the crack location are obtained. The work presented in the paper lays the theory foundation for
the fault analysis and structural modification of the gas generator.
Key Words: Transfer path analysis Gas generator

0B1 引言

振动系统通常包括三个部分:振动源、振动传递路径及振动接受体[1]。传递路径是指振动由振动源经
由特定的媒介传递至接受体所经过的物理介质。一般来说,振动和噪声的传递路径可分为两大类:一类为
经由空气传递,另一类为经由结构传递。实践表明,多数振动和噪声问题往往在系统级分析阶段才能发现,
因此建立振动和噪声的传递系统预测模型具有重要的意义,但是清晰正确的阐明多维路径对传递振动和噪
声的贡献量并不容易,通常在振动源、传递路径和接受体的交互作用的研究主要集中在实验方法和能量传
递方