高温管路包覆金属橡胶耗能特性及参数识别
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摘要
针对高温环境下管路系统减振难题,研究金属橡胶非线性本构关系和其减振特性影响参数,设计金属橡胶包覆管路结构,并进行动态和高温激励试验。通过动态试验数据绘制迟滞回线,基于迟滞回线精确分解法建立金属橡胶非线性泛函本构关系,借助最小二乘拟合法做参数识别。结果表明:所建模型能很好描述金属橡胶恢复力和位移随振幅与频率变化规律,验证了模型的准确性;金属橡胶减振性能随温度的升高呈增强趋势,随预紧量的增加反而减弱,随激振量级的增加而增强。
Aiming at the problem of vibration reduction of pipeline at high temperature,the nonlinear constitutive relation of metal rubber was established and the influence parameters of its vibration absorption characteristics were studied.The structure of pipeline coated by metal rubber was designed,and the dynamic and high temperature excitation experiments were done.Based on the dynamic test data,the hysteresis loop was drawn,the nonlinear functional constitutive relation of metal rubber was established based on the accurate decomposition method of hysteresis loop,and the parameter identification was done by the least square fitting method.The results show that the model can well describe the changing law of the recovery force and displacement of metal rubber with amplitude and frequency,which verifies the accuracy of the model.The damping property of metal rubber increases with the increase of temperature,decreases with the increase of pre-tightening,and increases with the magnitude of excitation.
Aiming at the problem of vibration reduction of pipeline at high temperature,the nonlinear constitutive relation of metal rubber was established and the influence parameters of its vibration absorption characteristics were studied.The structure of pipeline coated by metal rubber was designed,and the dynamic and high temperature excitation experiments were done.Based on the dynamic test data,the hysteresis loop was drawn,the nonlinear functional constitutive relation of metal rubber was established based on the accurate decomposition method of hysteresis loop,and the parameter identification was done by the least square fitting method.The results show that the model can well describe the changing law of the recovery force and displacement of metal rubber with amplitude and frequency,which verifies the accuracy of the model.The damping property of metal rubber increases with the increase of temperature,decreases with the increase of pre-tightening,and increases with the magnitude of excitation.
引文
[1]白鸿柏,路纯红,曹凤利,等.金属橡胶材料及工程应用[M].北京:科学出版社,2014:236-242.
[2]闫辉,姜洪源,刘文剑,等.具有迟滞非线性的金属橡胶隔振器参数识别研究[J].物理学报,2009,58(8):5238-5243.
[3]李玉龙,白鸿柏,何忠波.金属橡胶非线性减振系统混沌特性研究[J].北京理工大学学报,2016,36(5):491-497.
[4]李东伟,白鸿柏,杨建春,等.金属橡胶动力学建模及参数识别[J].振动与冲击,2005,24(6):57-60.
[5]侯军芳,白鸿柏,李东伟,等.高低温环境金属橡胶阻尼性能试验研究[J].航空材料学报,2006,26(6):50-54.
[6]彦秉金.高温环境下金属橡胶隔振器的性能分析及实验研究[D].哈尔滨:哈尔滨工业大学,2011.
[7]曹凤利,白鸿柏,王尤颜.振幅对金属橡胶材料疲劳寿命的影响分析[J].中国机械工程,2013,24(5):671-675.
[8]邹广平,刘泽,程贺章.预紧量与振动量级对金属橡胶减振器振动特性影响研究[J].振动与冲击,2015,34(22):173-191.
[9]敖宏瑞,孟庆鑫,姜洪源.安装预紧量对金属橡胶构件干摩擦阻尼的影响[J].材料科学与工艺,2005,13(3):225-227.
[10]路纯红,白鸿柏.金属橡胶/橡胶复合叠层耗能器试验建模与参数辨识[J].振动与冲击,2007,26(11):5-8.
[11]朱石坚,何琳.船舶机械振动控制[M].北京:国防工业出版社,2006:24-28.
[12]戴德沛.阻尼技术的工程应用[M].北京:清华大学出版社,1991:43-47.
[13]BERTHA A O,JOSE M R.Evaluation of the half-power bandwidth method to estimate damping in systems without real[],2010,39(14):1671-1686.
[14]GEORGE A P,GEORGE D H.On the use of the half-power bandwidth method to estimate damping in building structures[J].Soil Dynamics and Earthquake Engineering,2011,31(7):1075-1079.
[2]闫辉,姜洪源,刘文剑,等.具有迟滞非线性的金属橡胶隔振器参数识别研究[J].物理学报,2009,58(8):5238-5243.
[3]李玉龙,白鸿柏,何忠波.金属橡胶非线性减振系统混沌特性研究[J].北京理工大学学报,2016,36(5):491-497.
[4]李东伟,白鸿柏,杨建春,等.金属橡胶动力学建模及参数识别[J].振动与冲击,2005,24(6):57-60.
[5]侯军芳,白鸿柏,李东伟,等.高低温环境金属橡胶阻尼性能试验研究[J].航空材料学报,2006,26(6):50-54.
[6]彦秉金.高温环境下金属橡胶隔振器的性能分析及实验研究[D].哈尔滨:哈尔滨工业大学,2011.
[7]曹凤利,白鸿柏,王尤颜.振幅对金属橡胶材料疲劳寿命的影响分析[J].中国机械工程,2013,24(5):671-675.
[8]邹广平,刘泽,程贺章.预紧量与振动量级对金属橡胶减振器振动特性影响研究[J].振动与冲击,2015,34(22):173-191.
[9]敖宏瑞,孟庆鑫,姜洪源.安装预紧量对金属橡胶构件干摩擦阻尼的影响[J].材料科学与工艺,2005,13(3):225-227.
[10]路纯红,白鸿柏.金属橡胶/橡胶复合叠层耗能器试验建模与参数辨识[J].振动与冲击,2007,26(11):5-8.
[11]朱石坚,何琳.船舶机械振动控制[M].北京:国防工业出版社,2006:24-28.
[12]戴德沛.阻尼技术的工程应用[M].北京:清华大学出版社,1991:43-47.
[13]BERTHA A O,JOSE M R.Evaluation of the half-power bandwidth method to estimate damping in systems without real[],2010,39(14):1671-1686.
[14]GEORGE A P,GEORGE D H.On the use of the half-power bandwidth method to estimate damping in building structures[J].Soil Dynamics and Earthquake Engineering,2011,31(7):1075-1079.