嵌地半圆形刚平台双自由度传感系统地动响应

发布时间：2018-03-16 17:51

本文选题：半空间　切入点：双自由度振动系统　出处：《机械强度》2016年02期 　论文类型：期刊论文

【摘要】：利用波函数展开法和振动理论讨论了半空间界面半圆形刚性平台上双自由度振动系统的反平面响应问题。利用弹性波动理论写出半空间介质内的总位移波场,应用振动理论列出双自由度振动系统满足的二阶常系数微分方程组,通过半圆形刚性平台与介质界面之间的位移和应力连续条件求出散射波函数中未知系数,最后确定出振子和半圆形刚性平台分别相对于入射波振幅的位移振幅比以及刚性平台边界处介质内的环向应力集中系数的变化规律,并通过数值算例给出了计算结果,说明了分析结论的正确性。
[Abstract]:The antiplane response of a two-degree-of-freedom vibration system on a semicircular rigid platform with a half-space interface is discussed by using the wave function expansion method and the vibration theory. The total displacement wave field in a half-space medium is obtained by using the elastic wave theory. The second order differential equations with constant coefficients satisfied by the two-degree-of-freedom vibration system are listed by using the vibration theory. The unknown coefficients in the scattering wave function are obtained by using the displacement and stress continuity conditions between the semi-circular rigid platform and the interface of the medium. Finally, the displacement amplitude ratio of the vibrator and the semi-circular rigid platform relative to the incident wave amplitude and the variation law of the toroidal stress concentration factor in the media at the boundary of the rigid platform are determined, respectively, and the calculation results are given through numerical examples. The correctness of the conclusion is explained.
【作者单位】：烟台汽车工程职业学院机电工程系;
【基金】：山东省科技攻关项目(2012G0030011) 国家青年基金项目(11202179)资助~~
【分类号】：O347.4

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