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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >PARAMETRIC STUDY AND EXPERIMENTAL CORRELATION OF AN SMA BASED DAMPING AND PASSIVE VIBRATION ISOLATION DEVICE
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PARAMETRIC STUDY AND EXPERIMENTAL CORRELATION OF AN SMA BASED DAMPING AND PASSIVE VIBRATION ISOLATION DEVICE

机译：基于SMA的阻尼与无源隔振装置的参数研究与实验相关性。

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In this work, the effect of pseudoelastic response of shape memory alloys (SMAs) on damping and passive vibration isolation will be presented. This study has been conducted by developing and utilizing a shape memory alloy (SMA) model (a physically based SMA model) to perform extensive parametric studies on a non-linear hysteretic dynamic system, representing an actual SMA damping and passive vibration isolation prototype device. The prototype device consists of SMA tubes undergoing pseudoelastic transformations under transverse loading. To accurately model the non-linear hysteretic response of SMA tubes present in the prototype device, a Preisach model (an empirical model based on system identification) has also been modified to simulate the response of the prototype device. Both the simplified SMA model and the Preisach model have been utilized to perform experimental correlations with the results obtained from actual testing of the prototype device. The investigations show that variable damping and tunable isolation response are major benefits of SMA pseudoelasticity. Correlation of numerical simulations and experimental results has shown that large amplitude displacements causing phase transformations of SMA components are necessary for an SMA based vibration isolation device to be effective in reducing the transmissibility of a dynamic system. It has also been shown that SMA based devices can overcome performance trade-offs inherent in a typical softening spring-damper vibration isolation system. In terms of modeling, the Preisach model gave relatively accurate results due to close proximity in predicting actual SMA component behavior. However, for a generic parametric study, the simplified SMA model has been found to be more useful as it is motivated from the constitutive response of SMAs and hence, could easily incorporate different changes in system conditions.
机译：在这项工作中，将提出形状记忆合金（SMA）的拟弹性响应对阻尼和被动隔振的影响。通过开发和利用形状记忆合金（SMA）模型（基于物理的SMA模型）对非线性磁滞动态系统进行广泛的参数研究（代表实际的SMA阻尼和被动隔振原型设备），进行了这项研究。原型设备由SMA管组成，它们在横向载荷下会发生伪弹性变形。为了准确地模拟原型设备中存在的SMA管的非线性滞后响应，还对Preisach模型（基于系统识别的经验模型）进行了修改，以模拟原型设备的响应。简化的SMA模型和Preisach模型均已用于执行与原型设备实际测试所得结果的实验​​相关性。研究表明，可变阻尼和可调隔离响应是SMA伪弹性的主要优点。数值模拟和实验结果的相关性表明，导致SMA组件发生相变的大幅度位移对于基于SMA的隔振装置有效地降低动态系统的传递性是必要的。还已经表明，基于SMA的设备可以克服典型的软化弹簧-阻尼器隔振系统固有的性能折衷。在建模方面，由于在预测实际SMA组件行为方面非常接近，Preisach模型给出了相对准确的结果。但是，对于一般的参数研究，发现简化的SMA模型更有用，因为它是由SMA的本构响应驱动的，因此可以轻松合并系统条件的不同变化。

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