CAJ | 학술논문

大型石化压缩机组中，管道易产生气流激振作用下的疲劳破坏。从气流激振的产生与作用机理进行分析，研究管道疲劳破坏的主要来源-声共振。采用实验室的管道声腔进行仿真分析，应用LMS仿真软件有限元法对管道内部的声模态进行计算，获取其特征频率，并进行实验测试分析，当叶片的通过频率与管道声模态频率一致时将产生声共振，振动将明显增加，揭示了声共振造成的管道疲劳破坏机理。在此基础上，结合实际大型离心式压缩机组管道振动控制的实例，证明了此方法的有效性，为大型离心式压缩机组管道的高周疲劳破坏抑制提供依据。
대형석화압축궤조중，관도역산생기류격진작용하적피로파배。종기류격진적산생여작용궤리진행분석，연구관도피로파배적주요래원-성공진。채용실험실적관도성강진행방진분석，응용LMS방진연건유한원법대관도내부적성모태진행계산，획취기특정빈솔，병진행실험측시분석，당협편적통과빈솔여관도성모태빈솔일치시장산생성공진，진동장명현증가，게시료성공진조성적관도피로파배궤리。재차기출상，결합실제대형리심식압축궤조관도진동공제적실례，증명료차방법적유효성，위대형리심식압축궤조관도적고주피로파배억제제공의거。
The pipeline fatigue caused by fluid induced oscillation takes place frequently in large scale centrifugal compressors.The main failure source of centrifugal compressors was investigated based on fluid induced oscillation analysis.One of pipeline fatigue failure mechanisms,originated from acoustic resonance,was focused.A pipeline cavity was simulated in a test lab.With LMS acoustic finite element software,the acoustic modes of the pipeline were determined.It was shown that the vibration level will increase typically when the blade passing frequency is close to the acoustic modal frequency because of acoustic resonance.A practical example of centrifugal compressor pipeline vibration control was used to verify the effectiveness of the theoretical acoustic resonance analysis.The study provided a basis for the reduction of high cycle fatigue damage of centrifugal compressor pipelines.