Prediction of the Response of SMA Superelastic Systems Under Stationary Random Excitation
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摘要: 提出了一种简单的折线超弹性模型来描述SMA(Shape Memory Alloys)的力学特性,将其利用在等价线性化方法中,对SMA超弹性系统在随机激励下的响应进行了预测,预测结果和数值模拟方法的结果进行了对比,有较好的计算精度.该方法为解析方法,计算效率高,便于工程使用.Abstract: With an advantage that the motion equation of the system can be linearized directly in closed form, a simple superelastic model for SMA (Shape Memory Alloy) was proposed in the equivalent linearization method. The method was employed to predict response of SMA superelastic system under stationary white noise excitation. The results are in good agreement with those obtained by numerical simulation in all excitation levels for systems with different damping capacities. It was finally concluded that the equivalent linearization method based on the model can be used in engineering with higher computation efficiency.
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