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Dynamic performance of dielectric elastomer balloon incorporating stiffening and damping effect

机译：电介质弹性体气球的动态性能加强沉降效应

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摘要

Dielectric elastomer (DE) balloon is a new type of actuator that can be used as high frequency pumps or loudspeakers. In this paper, a theoretical model of DE balloon, incorporating stiffening and damping effect, is developed. The numerical results, such as stretch-time curves, phase diagrams and Poincare maps, are presented to study the influence of stiffening and damping on its dynamic performance. Taking the damping effect into account, the DE balloon can reach the equilibrium state after attenuation when subject to an instantaneous constant voltage; subject to a ramping voltage, the dynamic response presents three obvious stages: steady deformation, snap-through or snap-back, and damped oscillation. Due to the strain stiffening, the DE balloon may have two different stable equilibrium states and each has its own natural frequency. With small perturbation energy, the DE balloon can oscillate steadily around the two equilibrium states and resonate at multiple excitation frequencies. With large perturbation energy, the steady oscillation may transform into chaos. The damping force, however, changes no matter steady or chaotic oscillation into a constant periodic oscillation, and also determines the oscillation position.
机译：介电弹性体（DE）球囊是一种新型致动器，可用作高频泵或扬声器。本文开发了一种掺入气囊，加强和阻尼效果的理论模型。提出了数值结果，例如拉伸时间曲线，相图和庞的地图，以研究加强和阻尼对动态性能的影响。考虑阻尼效果，DE球囊在经受瞬时恒定电压后衰减后可以达到平衡状态;受到斜坡电压的影响，动态响应呈现三个明显的阶段：稳定变形，卡扣或扑克回来，阻尼振荡。由于应变加固，DE球囊可以具有两个不同的稳定平衡状态，并且每个稳定频率具有其自身的自然频率。对于小的扰动能量，DE球囊可以围绕两个平衡状态稳定地振荡，并以多种激发频率共振。具有大的扰动能量，稳定的振荡可能变成混乱。然而，阻尼力，无论稳定或混沌振荡都变为恒定的周期性振荡，也决定了振荡位置。

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