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时间:2020-06-03
《矩形脉冲激励下斜支承系统易损件的破损评价.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第34卷第3期噪声与振动控制Vol34NO.32014年6月N0ISEANDVIBRAT10NC0NTR0LJun.2014文章编号:1006.1355(2014)03—0073—05矩形脉冲激励下斜支承系统易损件的破损评价段宁宁,陈安军1,2(1.江南大学包装工程系,江苏无锡214122;2.国家轻工业包装制品质量监督检测中心,江苏无锡214122)摘要:以考虑易损件的斜支承系统为研究对象,建立矩形脉冲激励下系统无量纲非线性冲击动力学方程。以脉冲激励幅值与易损件加速度响应峰值之比作为系统无量纲临界加速度,临界加速度与无量纲脉冲时间乘积为系统无量纲临界速度,引入系统支承角或
2、频率比或质量比,构建斜支承系统易损件破损边界曲面。利用龙格一库塔数值分析方法求解方程,分析讨论频率比、质量比、支承角等因素对易损件破损边界的影响。研究表明,增大频率比、减小系统支承角、增大质量比等可增加易损件安全区域;随无量纲脉冲激励幅值增加,易损件破损区域减小。研究结论为斜支承系统的设计提供理论依据。关键字:振动与波;易损件;斜支承系统;矩形脉冲;破损边界中国分类号:0322文献标识码:ADOI编码:10.3969/j.issn.1006.1335.2014.03.015DamageEvaluationofTiltedSupportSpringSystemwithCrit
3、icalComponentsundertheActionofRectangularPulseDUANNing-ning,CHENAn-jun,(1.DepartmentofPackagingEngineering,JiangnanUniversity,Wuxi214122,JiangsuChina;2.ChinaNationalControlandTestCenterforPackagingQuality,Wuxi214122,JiangsuChina)Ab~aet:Thedimensionlessnonlineardynamicequationsoftiltedsuppo
4、rtspringsystemwithcriticalcomponentsundertheactionofrectangularpulseareestablished.Toevaluatedamagecharacteristicsofthecriticalcomponents,aconceptofdamageboundarysurfaceisproposed.Theratioofthepeakpulseaccelerationtothemaximumshockresponseaccelerationofthecriticalcomponentsisregardedasthed
5、imensionlesscriticalaccelerationofthesystem,andtheproductofthedimensionlesscriticalaccelerationandthedimensionlesspulsedurationisregardedasthedimensionlesscriticalvelocity.Theangleofthetiltedsupport,frequencyratioandmassratioofthesystemareintroducedasthreeparameterstoconstructthedamageboun
6、darysurfaceforthetiltedsupportsystem.Runge—Kuttamethodisusedtosolvetheequationsnumerically.Theinfluencesoffrequencyratio,massratio,andthetiltedangleofthesystemonthedamageboundarysurfaceofthecriticalcomponentsarediscussed.Theresultsdemonstratethatincreasingthefrequencyratio,decreasingtheang
7、leofthetiltedsupportorincreasingthemassratiocanenlargethesafetyzoneofthecriticalcomponents,andwiththeincreaseofthedimensionlesspeakpulseacceleration,thedamagezoneofthecriticalcomponentswillreduce.Thenumericalresultsprovideanacademicfoundationfordesignoftilteds
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