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船用紧急切断阀振动分析与结构改进

娄燕鹏,周世豪,余巍,张新奇

船用紧急切断阀振动分析与结构改进

娄燕鹏,周世豪,余巍,张新奇

(中国船舶重工集团公司第725研究所   河南 洛阳,471000)

摘要:  针对船用高压紧急切断阀“长颈”和重心偏高的特点,运用数值模拟和试验验证的方法对其进行抗振分析。通过改变阀盖外径和增加支承结构,得到不同参数下阀门的模态频率和振动特性。分析可知:增大长颈阀盖外径可提高阀门的惯性矩和模态频率,但不能提高阀门的抗振能力;增加支承结构可显著提高阀门的惯性矩和模态频率,同时可改变主导模态阶数,支承结构对横向抗振能力提升较大,对纵向抗振能力提升较小;在无共振的前提下,支承结构应选择抗弯截面系数高的结构。本文采用模拟分析和试验验证的方式对紧急切断阀抗振能力进行分析研究,为该类阀门的工程化设计提供参考。

关键词:  紧急切断阀; 模态分析; 振动特性; 惯性矩

中图分类号  TH134;O353.4       文献标志码:A     文章编号:1007-4414(2018)01-0057-04

Research on the Vibration analysis and structure optimization of Marine

emergency shut-off valve

LOU Yan-peng, ZHOU Shi-hao, YU Wei, ZHANG Xin-qi

(Luoyang Ship Materials Research Institute, Luoyang 471000, China)

Abstract  For the characteristics of "long neck" and higher heavy center, the method combined with numerical simulation and experiment was used to analyze the anti-vibration performance of Marine high pressure emergency shut-off valve. By changing the bonnet outside diameter and increasing the supporting structure, the modal frequency and vibration characteristics of different parameters were got, that increasing the bonnet outside diameter valve could improve inertia moment and modal frequency, but did not improve the ability of resisting vibration. Adding support structure could significantly improve inertia moment and modal frequency, and also changed the dominant modes order. The support structure largely increased the capability of transverse vibration resistance, but less improved that of longitudinal vibration resistance. Under the condition of non-resonant motion, the structure with higher flexural factor of section should be used. The methodology of combining numerical analysis and experiment was employed to research the vibration resistance capability in the article, which provides a reference for engineering design of this kind of valve.

Key words  Emergency shut-off valve; modal analysis; Vibration characteristics; inertia moment

分类:研究与试验

收稿日期:2018-12-14

基金项目:工信部高技术船舶科研项目:LNG发动机燃料存储及供给系统关键技术研究(编号:2014-508)

作者简介:娄燕鹏(1989-),男,河南省新乡市人,工程师,硕士,研究方向:从事特种金属阀门设计研发工作。

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