On the dynamic behavior of the Zener model with nonlinear stiffness for harmonic vibration isolation. (November 2018)

• Record Type: Journal Article
• Authors: de Haro Silva, Lucas; Paupitz Gonçalves, Paulo J.; Wagg, David
• Is Part Of: Mechanical systems and signal processing. Volume 112(2018)
• Page Start: 343
• Page End: 358
• Publication Date: 2018-11
• Subjects: Vibration isolation -- Nonlinear -- Zener model; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2018.04.037
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: It is described the dynamic behavior of the Zener model. Nonlinear stiffness in the Zener system improves the high frequency transmissibility. It is shown how to select the required damping for the improved isolator system. Abstract: In this paper, the dynamic behaviour of a mechanical isolator known as the Zener model is considered. This model consists of a mass supported by a spring that is in parallel with two further elements in series; a damper and a second spring. Previous work had already demonstrated that this system has benefits for the transmissibility above the resonance frequency, when compared with the traditional spring-damper isolator. In this work we study the influence of replacing the main spring with a nonlinear cubic spring. In fact, we show that use of a cubic stiffness can provide improvement in the transmissibility for frequencies around and above the resonance if the stiffness is of the softening type. Results are based on the analytical development of the equation of motion using the harmonic balance method.