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四分之一空间内椭圆孔对SH(shearing horizontal,反平面剪切)波的散射 被引量:2

SCATTERING OF AN ELLIPTIC CAVITY IN A QUARTER OF PLANE TO SH(SHEARING HORIZONTAL)-WAVE
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摘要 利用保角变换和多极坐标移动技术,求解四分之一空间内含有椭圆孔时椭圆孔对入射平面SH(shearing hori-zontal)波的稳态散射问题。首先利用四分之一空间两垂直边界处的应力自由条件,写出不含椭圆孔时空间介质内的反射波场;其次,通过保角映射技术考虑空间介质内含有任意主轴方向的椭圆孔时,由于椭圆孔对入射和反射波场的散射作用而产生的散射波场,并预先使得该散射波场满足四分之一空间介质两垂直边界处的应力自由条件,利用叠加原理,将入射波场、反射波场和散射波场叠加起来,即可得到问题的总位移波场。最后借助于椭圆孔边界处的应力自由条件和傅里叶级数展开列出求解散射波解中未知系数的无穷代数方程组,在满足计算精度的前提下将方程组进行有限项截断,得到一个有限线性方程组并求解。通过算例具体讨论四分之一空间内椭圆孔边界处的环向动应力集中系数随入射波入射角、无量纲波数、椭圆孔方位参数的变化情况。 Conformal mapping technology and multi-coordinate transformation are used to solve the steady scattering problem of an elliptical cavity in a quarter of plane space to incident plane SH(shearing horizontal)-wave.First,the stress-free conditions at the boundaries of the space can be utilized to obtain the reflecting wave field which is traveling in the space in which there is no elliptic cavity.Then,the case of which there is an arbitrary elliptical cavity in the space is considered utilizing the conformal m...
出处 《机械强度》 CAS CSCD 北大核心 2010年第5期774-780,共7页 Journal of Mechanical Strength
基金 山东省科技攻关项目(2006GG3210001)~~
关键词 SH(shearing HORIZONTAL 反平面剪切)波散射四分之一空间椭圆孔保角变换动应力集中系数 Scattering of SH(shearing horizontal)-wave A quarter of plane space Elliptical cavity Conformal mapping Dynamic stress concentration factor
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