An investigation on the field strength and loading rate dependences of the hysteretic dynamics of magnetorheological dampers

Abstract

This paper is an extended study on the model of the hysteretic dynamics of magnetorheological dampers based on a phenomenological phase transition theory (Wang and Kamath in Smart Mater. Struct. 15(6): [1725][1726][1727][1728][1729][1730][1731][1732][1733] 2006). It is demonstrated that, by appropriately choosing model parameters, the frequency dependence of the hysteretic dynamics can be captured very well by the model based on phase transition theory. Whilst by introducing an appropriate rescaling coefficient to account for the strength of the magnetized particle chains with various magnetic field strengths, the field strength dependence of the hysteretic dynamics can also be captured very well by the same differential equation with the same set of model parameters. There are in total eight model parameters introduced for capturing the hysteretic dynamics, including its dependence on the loading rate and field strength.

A simulation model with numerical method and optimal control of magneto‐rheological shock isolator

“…The model is able to characterize the dynamic hysteresis characteristic of the MR damper, and the comparison between the experiment and simulation results in Figure 2 illustrates it well. Zhang et al 23 extended the model, making it to be capable of modeling the loading rate and field strength dependencies, and the model can be expressed as follows: where f is the damping force, p is the driving velocity, , , , , and are material‐specific constants (when is equal to 0 and other parameters are not equal to 0, the model is reduced to an ordinary linear damper), k is the rescaling coefficient introduced by the model to describe the field dependence, I is the control current intensity, and , , and are material‐specific constants.…”

“…Table 1 shows the parameters of the MR fluid used in the current paper, which are chosen as the same as those in Reference 23. These parameters are obtained by applying the model to experimental data, 25 where the experiments were conducted on an MR damper model RD‐1005‐3 manufactured by Lord Corporation, and the viscous and shear properties of the MR fluid are controlled by the applied magnetic field, which is a function of the excitation current.…”

“…In the current paper, a vibration isolator is proposed to improve the shock response, which is based on the MR effect. The MR damper is characterized by the nonlinear second‐order ordinary differential equation model proposed by Zhang et al 23 The dynamic model of the system is then derived, which is coupled with two ordinary differential equations. The efficiency and accuracy of different numerical methods are compared.…”

Automotive magnetorheological dampers: modelling and parameter identification using contrast-based fruit fly optimisation

“…MR damper force is characterised by significant hysteresis [9][10] and delay, in the range of tens of milliseconds, owing to the inductance of the MR damper electromagnetic circuit [11][12]. Damping characteristics can be continuously adapted by controlling the electrical current that passes through the electromagnet [13][14][15].…”

Resposta dinâmica de edificações adjacentes acopladas : considerações sobre a interação solo – estrutura

“…Estudos numéricos e aplicações a escala real sobre esse tipo de dispositivo são encontrados em: Spencer et al (1997); Dyke et al (1996), Jansen e Dyke (2000), Xu et al (2000), Gavin et al (2001), Yi et al (2001), Ramallo et al (2002), , Johnson et al (2003), Sodeyama et al (2003), Sahasrabudhe e Nagarajaiah (2006), Nagarajaiah et al (2006a), Tsang et al (2006, Chooi e Oyadiji (2008), Carneiro (2009), Çesmeci e Engin (2010), Lara (2011), Basili et al (2013), Cha et al (2013), Jiang et al (2013), Zhang et al (2015) e Cha e Bai (2016).…”