Abstract
In actual installation, rubber mount are usually excited by different engine force amplitude and frequency. For better characterization of rubber mount, dynamic properties of metal to rubber mount are tested in this paper by using hysteresis loop method. Stiffness and loss factor of rubber mount are calculated from measured hysteresis loop. Experimental works are carried to identify the non-linearity in the amplitude dependent and frequency dependent properties of rubber mount. the s-shaped of hysteresis loop represent as non-linear behavior of rubber mount. the comparison is done for the dynamic properties of rubber mount under different excitation condition. the non-linear behavior of the rubber mount under excitation forced are reported. the result show stiffness change non-linearly according to different amplitude excitation force under different excitation frequency. the observation is significant especially when the excitations force is higher than 5N for the small metal to the rubber mounts. However this observation is different compared to the condition where excitation frequency getting higher. the non-linearity in the rubber mount is becoming not significant when the excitation frequency is getting higher.
Highlights
Rubber mounts are commonly used to resolve vibration and noise in any device or machine since 1930[1]
The study presented in this paper will measure the frequency dependent and amplitude dependent stiffness of rubber mount based on hysteresis loop method
The natural frequency of rubber mount is measured by determined the Frequency Response Function (FRF) of the system
Summary
Rubber mounts are commonly used to resolve vibration and noise in any device or machine since 1930[1]. Authors only focused their studied in low frequency range which is in between 0 Hz to 100 Hz. Gade et al used resonant and non-resonant methods to study complex modulus and loss factor of rubber mount which is shaker is used as excitation source. Shaker had been used in the experimental measurement in the low frequency testing on the cable isolators by Guzman et al to study non-linear behavior of rubber mount. The linear behavior for dynamic properties of rubber mount will visualize the hysteresis loop in elliptical shape. The study presented in this paper will measure the frequency dependent and amplitude dependent stiffness of rubber mount based on hysteresis loop method. The reason to measure frequency dependent and amplitude dependent stiffness at several force and frequency is to study the effect of force and frequency of non-linear properties of rubber
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