Abstract
This study aims to identify the fatigue lifetime of a thin-walled hollow spherical rubber isolator subjected to harmonic and random vibrations. Firstly, the nonlinear characteristics of the rubber materials are tested and analyzed through vibration experiments. The relationship among the nonlinear stiffness, nonlinear damping, and relative displacement amplitude is established. Secondly, an accelerated lifetime experiment under random excitation is carried out. The correlation between the root-mean-squared acceleration response of the random vibration system and the stiffness attenuation of the rubber isolator is established and modeled. A lifetime prediction method for rubber isolators is proposed based on the model. Finally, the influence of different loads on the lifetime of the rubber isolator is investigated. These methods provide an additional rationale for the further theoretical research and practical engineering application of rubber damping systems.
Highlights
This paper is mainly divided into three parts to identify the dynamic mechan in the activation energy of the chemical reaction in the fatigue process, which makes it properties of the a rubber isolator when subjected to vibration excitation investigate easier for oxidation reaction to proceed and reduces the fatigue lifetime and of rubber materials effect of mechanical vibration on theoflifetime of rubber still system fatigue lifetime of the rubber
This paper is mainly divided into three parts to identify the dynamic mechanical mechanical model from the system structure is extracted, and the mathematical mode properties of a rubber isolator when subjected to vibration excitation and investigate the the rubber isolatorofistheestablished andFirstly, analyzed based on mechanics theory; a fatigue lifetime rubber isolator
In order to investigate lifetime of a thin-walled hollow spherical rubber isolator, firstly, vibration experiments of rubber isolators subjected to harmonic and random excitations were conducted in this paper
Summary
With the rapid development of science and technology, various high-tech equipment is confronted with serious vibration isolation and buffering problems in specific environments. This paper is mainly divided into three parts to identify the dynamic mechan in the activation energy of the chemical reaction in the fatigue process, which makes it properties of the a rubber isolator when subjected to vibration excitation investigate easier for oxidation reaction to proceed and reduces the fatigue lifetime and of rubber materials [9,10,11]. This paper is mainly divided into three parts to identify the dynamic mechanical mechanical model from the system structure is extracted, and the mathematical mode properties of a rubber isolator when subjected to vibration excitation and investigate the the rubber isolatorofistheestablished andFirstly, analyzed based on mechanics theory; a fatigue lifetime rubber isolator. Rubber isolators are obtained through harmonic and random vibration testing and analysis
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