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工程力学  2014 

柔性约束边界对板抗爆动力响应的影响分析

, PP. 57-62

Keywords: ,柔性约束,弹性支承,动力响应,爆炸荷载

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Abstract:

约束边界的形式和刚度的差异会直接影响结构在爆炸荷载作用下的动力响应及其承载能力,现有防护结构的计算理论未能考虑柔性边界的影响,已不再适用,因此有必要建立考虑边界效应的结构抗爆计算方法。该文建立了具有周边分布柔性约束板的计算模型,推导出结构的振型函数,并计算分析了竖向弹性与阻尼约束、抗弯约束和荷载作用时间对结构位移和内力的影响。计算表明:竖向弹性与阻尼约束使板的整体位移增加,由此引起的附加惯性力会消耗部分能量,从而降低了结构的挠曲变形(相对位移)和弯矩值;周边的抗弯约束能限制结构的转动,也有效降低板的最大位移值,因此可通过调节周边柔性约束的形式和刚度提高结构的抗爆潜力。荷载作用时间主要通过参数影响结构的响应,较小时,随着的增加,弯矩值显著增大。

References

[1]  D. Vibrations of Mindlin rectangular plates with elastically restrained edges using static Timoshenko beam functions with the Rayleigh-Ritz method [J]. International Journal of Solids and Structures, 2001, 38(32): 5565―5580.
[2]  Z. Natural frequencies of rectangular plates using a set of static beam functions in Rayleigh-Ritz method [J]. Journal of Sound and Vibration, 1996, 189(1): 81―87.
[3]  W L. Dynamic analysis of beams with arbitrary elastic supports at both ends [J]. Journal of Sound and Vibration, 2001, 246(4): 751―756.
[4]  W L. Vibration analysis of rectangular plates with general elastic boundary supports [J]. Journal of Sound and Vibration, 2004, 273(3): 619―635.
[5]  W L, Daniels M. A Fourier series method for the vibrations of elastically restrained plates arbitrarily loaded with springs and masses [J]. Journal of Sound and Vibration, 2002, 252(4): 768―781.
[6]  Khov, Wen L Li, Ronald F Gibson. An accurate solution method for the static and dynamic deflections of orthotropic plates with general boundary conditions [J]. Composite Structure, 2009, 90(4): 474―481.
[7]  王明洋, 刘斌. 减震装置提高防护门抗力的理论分析[J]. 防灾减灾工程学报, 2011, 31(6): 700―703. Song Chunming, Wang Mingyang, Liu Bin. Theoretical analysis of shock-mitigating device to increase the resistibility of protective door [J]. Journal of Disaster Prevention and Mitigation Engineering, 2011, 31(6): 700―703. (in Chinese)
[8]  王明洋, 王德荣. 柔性动边界梁的弹塑性动力响应分析[J]. 工程力学, 2008, 25(12): 42―47. Song Chunming, Wang Mingyang, Wang Derong. Analysis of elastic-plastic dynamic responses of beams with flexible supports [J]. Engineering Mechanics, 2008, 25(12): 42―47. (in Chinese)
[9]  王明洋. 动支座对拱结构抗爆承载力的影响[J]. 爆炸与冲击, 2009, 29(3): 312―317. Song Chunming, Wang Mingyang. Effects of flexible supports on explosion resisting capacity of Arches [J]. Explosion and Shock Waves, 2009, 29(3): 312―317. (in Chinese)
[10]  方秦, 郭志昆, 等. 静载作用下钢筋混凝土梁板结构的面力效应(Ⅱ)-试验研究及主要影响参数讨论[J]. 土木工程学报, 2011, 44(1): 36―41. Chen Li, Fang Qin, Guo Zhikun, et al. Membrane action on reinforced concrete beam-slab structures under static load (Ⅱ) -test and discussion on ma in affecting parameters [J]. China Civil Engineering Journal, 2011, 44(1): 36―41. (in Chinese)

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