Calculation methods of diagnostics for tube constructions elements of power equipment destruction

被引：1
|
作者：
Fesenko, Tatiana [1 ]
Dronova, Elena [1 ]
Shitova, Lidiya [1 ]
机构：
[1] Russian Acad Sci, Fed Budget Funded Inst Machine Sci, 4 Maly Kharitonyevsky Pereulok, Moscow 101990, Russia
来源：
1ST INTERNATIONAL CONFERENCE ON INTEGRITY AND LIFETIME IN EXTREME ENVIRONMENT (ILEE-2019) | 2019年 / 20卷
关键词：
mathematical models; tube bundles; cross flow; approach flow; excitation mechanism; dynamic response; frequencies; amplitudes; vibro-reliability;
D O I：
10.1016/j.prostr.2019.12.153
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The report is devoted to analysis of increasing vibro-reliability of power equipment elements namely heat exchanger and steam generators. According to statistics, power equipment destruction is a result of heat exchanger tubes intense vibrations in tube bundles, as the most loaded elements. Therefore, the problem of mathematical models creation which allow assessment and analysis of hydrodynamic forced vibrations in tube bundles becomes actual. For this, forces acting on the tube bundles in flow and hydrodynamic connections between them are determined. By means of obtained hydrodynamic connections matrices the behavior of tube bundle depending on the velocity of approach flow is studied, the boundary of system transition to an unstable state is determined, i.e. the corresponding values of cross flow critical velocity for different types of tube bundles. Based on obtained hydrodynamic connections matrices amplitude-frequency characteristics for a particular tube bundle were determined. (C) 2019 The Authors. Published by Elsevier B.V.
引用
收藏
页码：284 / 293
页数：10
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