一般线性黏弹性阻尼器保护系统非均匀与完全非平稳地震响应解析分析
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TU311.3

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国家自然科学基金资助项目(51468005);广西科技大学创新团队支持计划(校发[2016]31 号)


Analytical analysis of non-uniform and completely nonstationary seismic response of a general linear viscoelastic damper protection system
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    摘要:

    为建立设置支撑的一般线性黏弹性耗能结构阻尼器保护系统的抗震设计和动力可靠度分析方法,提出了在非扩阶空间上,基于非均匀和完全非平稳地震激励下,设置支撑的一般线性黏弹性耗能结构阻尼器保护系统响应的通用解析解。采用设置支撑黏弹性阻尼器的最一般积分型分析模型,用微分积分方程组实现设置支撑的一般线性黏弹性阻尼耗能结构系统的非扩阶建模;采用传递矩阵法,直接获得耗能结构阻尼器保护系统在任意激励和非零初始条件下瞬态响应的非扩阶模态叠加解析解;应用此解析解和随机振动频域分析法,获得了耗能结构阻尼器保护系统在一般和 8 种经典均匀与非均匀非平稳地震激励以及完全非平稳地震功率谱模型下的具体响应解析解。通过减震和隔震两种典型结构的复模态法和频响函数法的理论验证分析,以及均匀、非均匀、完全非平稳算例响应分析,证明了本文方法的正确性、简易性和普适性;所获得的瞬态响应解析解和非平稳地震响应分析法,一方面可对整体耗能系统各构件进行基于泊松假设的抗震动力可靠度分析,另一方面将为结构系统建立基于反应谱的模态叠加抗震设计提供分析路径。

    Abstract:

    In order to establish the seismic design and a dynamic reliability analysis method of the damper protection system of general linear viscoelastic energy dissipation structure with braces,a general analytical solution of the response of the damper protection system of the general linear viscoelastic energy dissipation structure with braces under the non-uniform and completely nonstationary seismic excitation is proposed in this paper. The most general integral type analysis model with support viscoelastic damper is used to realize the non-extended order modeling of the general linear viscoelastic damping energy dissipation structure system with braces by using differential integral equations. The non-extended order mode superposition solution of the transient response of the damper protection system under arbitrary excitation and non-zero initial conditions is directly obtained by using the transfer matrix method. By using the analytical solution and the frequency domain analysis method of random vibration,the specific response analytical solutions of the damper protection system of energy dissipation structure are obtained under the general and eight classical uniform and non-uniform modulation filtered white noise seismic excitation and completely non-stationary seismic power spectrum models. The correctness,simplicity and universality of this method are proved by the theoretical verification analysis of the complex mode method and frequency response function method of two typical structures of vibration absorption and isolation,as well as the response analysis of uniform,non-uniform and completely non-stationary cases. The obtained analytical solutions of transient response and non-stationary seismic response can,on the one hand,carry out Poisson based analysis on the components of the overall energy dissipation system. On the other hand,it will provide an analysis path for the structural system to establish the mode superposition seismic design based on response spectrum.

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李创第,王博文,昌明静.一般线性黏弹性阻尼器保护系统非均匀与完全非平稳地震响应解析分析[J].振动工程学报,2022,35(5):1084~1100.[LI Chuang-di, WANG Bo-wen, CHANG Ming-jing. Analytical analysis of non-uniform and completely nonstationary seismic response of a general linear viscoelastic damper protection system[J]. Journal of Vibration Engineering,2022,35(5):1084~1100.]

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  • 在线发布日期: 2022-11-23
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