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Developing an inerter model using multibody dynamics software for railway vehicle applications
Published in Maksym Spiryagin, Timothy Gordon, Colin Cole, Tim McSweeney, The Dynamics of Vehicles on Roads and Tracks, 2018
Yunshi Zhao, Gareth Tucker, Roger Goodall, Simon Iwnicki, Jason Zheng Jiang, Malcolm C. Smith
An inerter is a passive, mechanical device, which produces a force proportional to the relative acceleration between its ends [1]. Theoretically, the inerter forms a complete set with the spring and damper to realise general passive mechanical impedances. Potential applications of inerters in the areas of vehicle suspensions including motorcycle steering stability, vibration absorption and building vibration control have been studied in [2–6]. The inerter is in commercial use in motorsport.
Vibration performance improvement of D/G-set employing inerter-rubber vibration isolator
Published in Journal of Marine Engineering & Technology, 2021
Huabing Wen, Yang Li, Kun Zhang, Yue Liu, Chengwei Chang
For this problem, inerter was proposed in 2002 (Chen et al. 2009). Inerter is a two-terminal mechanical device with a property that a pair of equal and opposite forces applied at its two terminals is proportional to the relative acceleration between them. The role of inerter plays in the mechanical devices is similar to a capacitor in the circuit; it provides a new direction for the low-frequency anti-vibration design (Christakis and Smith 2005; Christos et al. 2009). Moreover, the applications of inerter in various mechanical structures have been investigated in the past few years. Smith applied the inerter to vehicle suspensions and high-performance motorcycle control systems, both of them achieved amazing improvements (Smith and Wang 2004; Papageorgiou and Smith 2006). Michael applied the inerter to vehicle suspensions (HuYinlong 2014; Chen et al. 2016), vibration absorbers (Hua et al. 2015; Hu and Chen 2015; Hua et al. 2016) and beam structures (Jin et al. 2016). Chen et al. designed a fluid inerter (Shen et al. 2016) and realised the ideal vehicle ceiling and floor damping (Chen et al. 2008; Chen et al. 2013). Lazar used inerter in cable damping (Lazar et al. 2016). Soong et al. also applied inerter to vehicle suspensions to improve the anti-vibration performance (Soong et al. 2017; Soong et al. 2014).
Using an inerter-based suspension to improve both passenger comfort and track wear in railway vehicles
Published in Vehicle System Dynamics, 2020
T. D. Lewis, J. Z. Jiang, S. A. Neild, C. Gong, S. D. Iwnicki
An inerter [6] is a two-terminal mechanical element which exerts a force proportional to the relative acceleration between its terminals. A ball-screw type inerter is shown in Figure 1(b). Inerters are equivalent to capacitors using the force-current analogy, and each possesses a constant value, measured in kg. Mechanical networks combining inerters, springs and dampers can theoretically describe any positive-real transfer function [7]. A preliminary study of the implementation of inerters to a quarter-car model [8], which used a prototype inerter, yielded improvements in ride, tyre normal load and handling of 10% or greater over conventional spring and damper based passive struts. The use of inerters has recently expanded into buildings [9–11], road vehicles [12–14], aircraft landing gear [15,16] and optical tables [17]. First proposed in 2002 in the form of a rack and pinion design [6], other inerter designs have been proposed such as the ball-screw inerter used in Formula 1 [18], fluid inerters [19–21] and hydraulic inerters [22]. The specific inerter realisation used is highly dependent on the application, space and manufacturing constraints, and the configuration required.
Floating slab track with inerter enhanced dynamic vibration absorbers
Published in Vehicle System Dynamics, 2023
Zhibao Cheng, Qun Zhang, Zhifei Shi
Inerter is a linear two-terminal mechanical element, which can develop an internal force proportional to the acceleration difference of its terminals. That is: in which the constant b is the so-called inertance measured in mass units (kg). and are the displacements at the two terminals. A dot over a symbol denotes time differentiation.