爆炸冲击震动隔离效果的能量传递率评价方法
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摘要
基于能量方法评价隔震系统的隔震效率,建立了人体与隔震结构的二自由度隔震系统力学模型,通过分析隔震系统在爆炸冲击震动输入下的能量响应,参考传统的加速度传递率评价方法,提出了从人体承受冲击能量大小的角度评价爆炸冲击隔震系统隔震效率的方法,即能量传递率法。通过输入不同峰值和脉冲宽度的半正弦加速度脉冲信号,数值模拟了二自由度隔震系统在不同爆炸冲击震动输入工况下的能量响应,以及隔震系统的加速度传递率和能量传递率。通过对计算结果的分析,研究了隔震系统的输入与输出之间的关系,以及输入能量对隔震效率的影响规律。研究结果表明:与传统的加速度传递率相比,能量分析方法能够较好地反映爆炸冲击隔震系统的隔离效果。
In order to evaluate the isolation efficiency of shock isolation system using energy method,two degrees of freedom mechanical model of shock isolation system consisting of human body and protective structure was introduced.The energy responses of the model due to the excitation of explosion and shock wave were solved.A new evaluation method of shock isolation efficiency was proposed based on the energy transferred to body,which was named the energy transfer ratio.By inputting the half-sine impulse acceleration composed of different peak values and duration time,the energy responses,acceleration transfer ratio and energy transfer ratio of the two degrees of freedom shock isolation system were simulated.According to the results of many numerical examples,the relationship of input and output was studied.The influence rules of the input total energy on the isolation efficiency were obtained.Numerical results illustrate that energy analysis method can reflect the inherent characteristic of the shock isolation system.
In order to evaluate the isolation efficiency of shock isolation system using energy method,two degrees of freedom mechanical model of shock isolation system consisting of human body and protective structure was introduced.The energy responses of the model due to the excitation of explosion and shock wave were solved.A new evaluation method of shock isolation efficiency was proposed based on the energy transferred to body,which was named the energy transfer ratio.By inputting the half-sine impulse acceleration composed of different peak values and duration time,the energy responses,acceleration transfer ratio and energy transfer ratio of the two degrees of freedom shock isolation system were simulated.According to the results of many numerical examples,the relationship of input and output was studied.The influence rules of the input total energy on the isolation efficiency were obtained.Numerical results illustrate that energy analysis method can reflect the inherent characteristic of the shock isolation system.
引文
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[2]段小帅,梁青,陈绍青,等.双层隔振系统隔振效果评价与试验[J].振动、测试与诊断,2010,30(6):694-697.(DUAN Xiaoshuai,LIANG Qing,CHENShaoqing,et al.Evaluation and experiment onvibration-isolation effectof double-stage vibration-isolation system[J].Journal of Vibration,Measurement&Diagnosis,2010,30(6):694-697.(in Chinese))
[3]涂奉臣,陈照波,刘旺中,等.用于整星隔振效果评价的隔振器影响系数指标研究[J].振动与冲击,2011,30(3):220-224.(TU Fengchen,CHENZhaobo,LIU Wangzhong,et al.Evaluating indicator ofwhole-satellite vibration isolation[J].Journal ofVibration and Shock,2011,30(3):220-224.(inChinese))
[4]查长松,黄炼.带泡沫铝冲击吸能器的单层隔振系统隔冲效果评估[J].舰船科学技术,2010,32(9):35-38.(ZHA Changsong,HUANG Lian.Impactisolation effect evaluation of the single-stage-vibration-isolating-system with Al-foam energy absorber[J].ShipScience and Technoligy,2010,32(9):35-38.(inChinese))
[5]沈波,方秦,相恒波.地冲击荷载作用下双层结构磁流变阻尼器隔震效果的数值模拟[J].防灾减灾工程学报,2009,29(1):27-34.(SHEN Bo,FANGQin,XIANG Hengbo.Numerical simulation of doublelayer vibration isolation systems with MRD subjected toground shock[J].Journal of Disaster Prevention andMitigation Engineering,2009,29(1):27-34.(inChinese))
[6]Choi K M,Cho S W,Jung H J,et al.Semi-activefuzzy control for seismic response reduction usingmagnetorheological dampers[J].EarthquakeEngineering and Structural Dynamics,2004,33(6):723-736.
[7]杜建国,谢清粮,冯进技,等.不同爆炸冲击震动输入对整体隔震系统隔震效果的影响[J].爆炸与冲击,2010,30(3):276-282.(DU Jian-guo,XIE Qing-liang,FENG Jin-ji,et al.Effect of different explosionor shock seismic inputs on efficiency of a wholevibration-isolating system[J].Explosion and ShockWaves,2010,30(3):276-282.(in Chinese))
[8]Soong T T,Dargush G F.Passive energy dissipationsystem in structural engineering[M].Chichester:JohnWiley&Sons,1997:20-25.
[9]杜永峰,李慧.智能隔震:基于能量响应和可靠度的前景分析[J].工程力学,2006,23(增刊Ⅱ):5-13.(DU Yong-feng,LI Hui.Smart isolation futureprospect based on energy response and dynamicreliability[J].Engineering Mechanics,2006,23(Suppl.Ⅱ):5-13.(in Chinese))
[10]周云,徐彤,周福霖.抗震与减震结构的能量分析方法研究与应用[J].地震工程与工程振动,1999,19(4):133-139.(ZHOU Yun,XU Tong,ZHOUFulin.Research and development of structural seismicdesign based on energy method[J].EarthquakeEngineering and Engineering Vibration,1999,19(4):133-139.(in Chinese))
[11]李大庆,杨武.建筑结构中隔震器对地震输入能量的影响[J].工程抗震与加固改造,2005,27(1):53-55.(LI Daqing,YANG Wu.Influence of seismicisolator on inputting seismic energy in architecturalstructures[J].Earthquake Resistant Engineering andRetrofitting,2005,27(1):53-55.(in Chinese))
[12]涂文戈,邹银生.基于能量方程的建筑结构半主动控制[J].地震工程与工程振动,2005,25(3):145-151.(TU Wenge,ZOU Yinsheng.Semi-active controlof buildings based on energy response[J].EarthquakeEngineering and Engineering Vibration,2005,25(3):145-151.(in Chinese))
[13]Wong K K,Yang R.Effectiveness of structural controlbased on control energy perspectives[J].EarthquakeEngineering and Structural Dynamics,2001,30(12):1747-1768.
[14]高清,赵学琴,霍睿,等.基于能量观点的主动隔振系统性价比研究[J].机械科学与技术,2006,25(10):1147-1150.(GAO Qing,ZHAO Xueqin,HUORui,et al.Study of cost performance of an activevibration isolation system based on energy view[J].Mechanical Science and Technology,2006,25(10):1147-1150.(in Chinese))
[15]唐滢,彭学创.柔性基座上隔振系统的能量分析[J].船海工程,2008,37(1):73-76.(TANG Ying,PENG Xuechuang.The energy analysis of the vibrationisolation system on the flexible base[J].Ship andOcean Engineering,2008,37(1):73-76.(inChinese))
[16]伍先俊,朱石坚.振动能量流的计算方法研究[J].农业工程学报,2006,22(3):1-5.(WU Xianjun,ZHU Shijian.Methods for calculating vibration powerflow[J].Transactions of the CSAE,2006,22(3):1-5.(in Chinese))
[17]中国人民解放军总参谋部工程兵科研三所.鼓形斜夹式钢丝绳隔震器:中国,ZL02267872.7[P].2003-07-16.
[18]杜建国,谢清粮,冯进技,等.YGG型钢丝绳隔震系统轴向消极隔震能量分析[J].防护工程,2009,31(6):23-28.(DU Jianguo,XIE Qingliang,FENGJinji,et al.Energy analysis of the drum-shaped steelwire rope shock isolator in axial passive shock isolation[J].Protective Engineering,2009,31(6):23-28.(in Chinese))
[19]振动与冲击手册编辑委员会.振动与冲击手册:工程应用[M].第三卷.北京:国防工业出版社,1992:534-564.
[20]杜建国,张洪海,谢清粮.基于反应谱分析的爆炸冲击震动信号的半正弦脉冲等效[J].防护工程,2009,31(1):11-14.(DU Jianguo,ZHANGHonghai,Xie Qingliang.Half-sine pulse equivalent ofthe explosion and shock signals based on the responsespectrum analysis[J].Protective Engineering,2009,31(1):11-14.(in Chinese))
[21]冯进技,楼梦麟,贺永胜.鼓形钢丝绳隔震器参数识别[J].防护工程,2007,29(5):10-12.
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