Longitudinal Resonance Method for Measuring Mechanical Parameters of Viscoelastic Materials

›› 2012, Vol. 32 ›› Issue (4): 192-194.

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Longitudinal Resonance Method for Measuring Mechanical Parameters of Viscoelastic Materials

ZHAO Jing,HOU Hong, SUN Liang

( College of Marine, Northwestern Polytechnical University, 710072 Xi’an, China )mprove vibration transfer characteristic is an important way to improve ride comfort of motorcycle. Based on the 5-DOF model of motorcycle with road input and Lagrange equation，the frequency response characteristic were obtained for the vertical acceleration on the motorcycle body and displacement of front and rear wheel. With regard to some 125 motorcycles, frequency response characteristic is calculated by using Matlab, and transfer characteristic of motorcycle is tested with motorcycle road simulator. The results show that the analysis and test methods play an important guidance role to improve ride comfort of motorcycle.

Received:1900-01-01 Revised:1900-01-01 Online:2012-08-18 Published:2012-08-18

纵向共振法测量粘弹性材料力学参数

赵静，侯宏，孙亮

西北工业大学航海学院，西安 710072 )

通讯作者: 赵静

Abstract

Abstract: ased on virtual instrument measuring system, mechanical parameters of the viscoelastic material are measured in longitudinal vibration. One end of the bar is excited by a periodic sinusoidal signal with vibrator, while the other end is allowed to move freely. After which, the amount of acceleration of these two ends are measured using the transducer. At resonant frequency, Young's modulus and loss factor can be calculated using the amplitude of acceleration ratio between the driven end and the free end. Besides this, the sampled signals are averaged in several times, which can improve SNR highly. The measuring results agree well with that of commercial viscoelastic instrument.

Key words: vibration and wave, motorcycle, transfer characteristic, analysis, test

摘要： (利用虚拟仪器测试系统，对粘弹性材料力学参数进行纵向共振法测量。用激振器产生多周期正弦信号，激励棒状试样纵向振Ivibration and wave ; motorcycle ; transfer characteristic ; analysis ; test动，测量激振器输出端和材料自由端的加速度比值。通过共振频率及共振频率处加速度比的幅值，可以计算样本的杨氏模量和损耗因子。采集信号经过多次时域平均，可在最大程度上提高测试的信噪比。系统的测量结果与商用粘弹性仪结果是一致的。

关键词: 振动与波, 虚拟仪器, 粘弹性材料, 纵向振动, 杨氏模量, 损耗因子

ZHAO Jing;HOU Hong;SUN Liang. Longitudinal Resonance Method for Measuring Mechanical Parameters of Viscoelastic Materials[J]. , 2012, 32(4): 192-194.

赵静;侯宏;孙亮. 纵向共振法测量粘弹性材料力学参数[J]. 噪声与振动控制, 2012, 32(4): 192-194.

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Longitudinal Resonance Method for Measuring Mechanical Parameters of Viscoelastic Materials

纵向共振法测量粘弹性材料力学参数

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