减压环耗能性能的静力试验及动力有限元分析

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1、振动与冲击JOURNALOFVIBRATIONANDSHOCK减压环耗能性能的静力试验及动力有限元分析汪敏J石少卿'，阳友奎2（1•解放军后勤工程学院军事建筑工程系，敢庆401311；2.布會克（成都）工程有阳公司•成都61173!）摘要：被动柔性防护系统中采用的减压环由钢饭及铝管套筒组成•应用中将钢丝規穿过钢恃连接在防护系统的支據绳及拉锚绳上.起到吸收能最和缓冲冲击荷载的作用。根据彼动防护系统中减压环的工作状态.将减压环的受力形式简化为一端固宣，另一端受荷戟作用•并逬行了静力试验和动力有限元分析。在较低的冲击荷载作用下•数值计算结杲

2、与试验结果较吻合，随看冲击荷载速度的增大，启动荷载逐渐增大•减压环耗能能力有一定的捉高。另外,采用数值计算方法研究了减压环中的铝管套筒长度对耗能性能及启动荷戟的影响：结果表明:碱压歼在动力何戟作用下的耗能能力开始增大比较明显•后期耗能能力无明显增大，而启动荷载随希套简长度的增丈先减小而后增大•当铝管套筒在合适长度范圏内时，祓压坏在动力荷载作用下理想吸能效率与静力试验结果较接近C关键词：域压环;耗能；静力;动力中图分类号：U213.83文飆标识码：AStatictensiletestandFEMdynamicsimulationfora

3、ring-brakeenergydisspaterWANGMid,SHIShaoxing1,YANGYou^kui2(1.Dept・ofCivilEng..PLALogisticalEngineeringtniveraity,Chongqing401311■China；2.Geobrugg(Chengdu)CO.tLTD.Chengdu611731fChina)Abstract:Aring・brakeenergydissipaterofapassivesystemconsistsoftubularsteelloopsandalumin

4、umcompressionsleeves,andsteelcablesdrilledthroughthetubularsteelloopsareconnectedtoaanchorropeandasupportrope.Thering-brakeenergydissipaterusedinthesystemisbasedontheirgreatslipresistancecapacitywhichcandissipatethekineticenergyandalleviatestheimpaclload・Basedontheeffec

5、tofaring-brakeenergydissipaterinapassivesystemtstatictensiletestsandFEMdynamicsimulationwerecarriedout.Thenumericalresultswitharing-brakeenergy*dissipateratthelowspeedloadshowedthecorrelationtothestatictensiletests.Theslipresistanceincreasedandtheenergydissipationperfon

6、nancewasimprovedwiththeloadingspeedincreasing.Inaddition.theinfluencesofthelengthofthealuminumcompressionsleevesontheslidingforceandthedissipatedenergyofaring-brakeenergydissipaterwerestudied・Tlieresultsshowedthattheenergydissipationcapacityofthering-brakeenergydissipat

7、erincreasessingificantlyinthebeginning,butnosignificantincreaseoccurslately;theslidingforcefirstlydecreasesandthenincreaseswithincreaseinthesleevelength；whenthealuminumcompressionsleevesareinappropriatelengthrange,theidealenergydissipationefficiencyobtainedwiththedynami

8、csimulationisclosetothatofthestatictests.Keywords:ring-breakenergydissipater；energydissipation；static；dynamic被