Modeling of Active and Passive Damping Patches with Application to a Transmission Casing Cover

Abstract

Combined active and passive damping is a recent trend that can be an effective solution to challenging NVH problems, especially for lightweight vehicle components that demand advanced noise and vibration treatments. Compact patches are of particular interest due to their small size and cost, however, improved modeling techniques are needed at the design stage for such methods. This paper presents a refined modeling procedure for side-by-side active and passive damping patches applied to thin, plate-like, powertrain casing structures. As an example, a plate with fixed boundaries is modeled as this is representative of real-life transmission covers which often require damping treatments. The proposed model is then utilized to examine several cases of active and passive patch location, and vibration reduction is determined in terms of insertion loss for each case. Results are compared to an experiment with an actual transmission casing for validation, using piezoelectric active patches and constrained-layer passive patches with a viscoelastic core. Conclusions are drawn about patch size and location in terms of NVH reduction capability, and guidelines are suggested for the dynamic design process.

Broadband sound transmission loss enhancement of an arbitrary-thick hybrid smart composite plate using multi-objective particle swarm optimization–based active control

“…Moreover, the recently developed hybrid active–passive damping systems (Benjeddou, 2001; Trindade and Benjeddou, 2002), which integrate the high performance, capability, precision, and adaptivity of piezoelectric-active control systems with the simplicity, reliability, low cost, effectiveness, and stability robustness of passive viscoelastic damping treatments, have opened new horizons for wide-band noise and vibration control. Accordingly, there is a relatively large amount of research works in the area of hybrid active–passive structural vibration control based on the piezoelectric materials and viscoelastic damping treatments (Kattimani and Ray, 2014; Koh et al, 2012; Kumar and Singh, 2012; Plattenburg et al, 2015a; Zhang and Zheng, 2014; Zheng et al, 2011), owing to the associated prospective industrial applications (Kang and Kim, 2003; Plattenburg et al, 2015b; Vasques and Cardoso, 2011). However, there are comparatively much fewer investigations on the hybrid active–passive acoustic (noise) suppression systems (Benjeddou, 2001; Cabell and Gibbs, 2000; Zheng et al, 2005).…”

“…Such analysis is not restricted by the different assumptions made in classical and/or higher order plate theories (Denli and Sun, 2007; D’Alessandro et al, 2013; Plattenburg and Singh, 2015; Sahu et al, 2015; Sanada et al, 2015; Wang et al, 2005). It can expediently aid the acoustic engineers in the prospective industrial and noise control engineering applications (Huang and Nutt, 2009; Kang and Kim, 2003; Kuo et al, 2008; Plattenburg et al, 2015b; Rocha and Dias, 2015; Vasques, 2012; Vasques and Cardoso, 2011). Moreover, the deliberated extensive simulation data can aid as a reliable benchmark for evaluation of asymptotic or strictly numerical approaches (Li, 2011; Plattenburg and Singh, 2015; Ruzzene and Baz, 2000; Shah and Ray, 2013; Shields et al, 1998).…”