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Exponential and polynomial decay for a laminated beam with Fourier's law of heat conduction and possible absence of structural damping

机译:具有傅里叶热传导定律的层压光束的指数和多项式衰减,可能存在结构阻尼

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摘要

We study the well-posedness and decay properties of a one-dimensional thermoelastic laminated beam system either with or without structural damping, of which the heat conduction is given by Fourier's law effective in the rotation angle displacements. We show that the system is well-posed by using the Lumer-Philips theorem, and prove that the system is exponentially stable if and only if the wave speeds are equal, by using the perturbed energy method and Gearhart-Herbst-Pruss-Huang theorem. Furthermore, we show that the system with structural damping is polynomially stable provided that the wave speeds are not equal, by using the second-order energy method. When the speeds are not equal, whether the system without structural damping may has polynomial stability is left as an open problem.
机译:我们研究了一维热弹性层压梁系统的良好姿势和衰减性能,无论是在旋转角位移中有效的傅里叶的定律给出了一维热弹性层压梁系统的良好姿势和衰减性能。 我们表明该系统通过使用Lumer-Philips定理来良好,并证明系统是指数稳定的IF且仅当波速相等,通过使用扰动的能量方法和Gearhart-Herbst-Pruss-Huang定理 。 此外,我们表明,具有结构阻尼的系统是多项式稳定的,只要通过使用二阶能量方法,波速不等于。 当速度不等于时,没有结构阻尼的系统可以具有多项式稳定性作为打开问题。

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