振动压实系统动力学模型研究
首发时间:2015-07-17
摘要:对分段线性滞回模型和双曲函数滞回模型进行了研究,揭示了这两种滞回模型在振动压实系统中土的动力学特性分析时存在的局限性,并提出了一种新的适合振动压实系统土的非线性滞回模型。通过数值分析结果与试验研究结果对比,验证了该模型的正确性。利用渐进法对振动系统进行了振动响应分析,结果表明,指数函数滞回模型与土在振动压实过程中所表现的特性及试验研究结果相一致,更适合在振动压实过程中土的动力学特性分析,为进一步揭示振动摩擦机理提供了依据。
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Study on Dynamic model of vibration compaction system
Abstract:Piecewise linear and hyperbolic hysteretic models were studied and their limitations in dynamic analysis of soil in vibration compaction system were revealed. An adaptive nonlinear hysteretic model was put forward. By comparing with numerical analysis results and test, the new model--exponential function hysteretic model was validated. The vibration response was analyzed by the successive approximation method in nonlinear theory. The results indicate that the exponential function model is consistent to characteristics showed by soil in the process of vibration compaction and test results. The exponential function hysteretic model is more suitable for dynamic analysis of soil in vibration compaction system, which provides a strong basis for further study of vibration friction mechanism.
Keywords: vibration friction hysteretic model vibration compaction
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