邓先琪, 苏成, 马海涛. 功能梯度梁静力与动力分析的格林函数法[J]. 工程力学, 2020, 37(9): 248-256. DOI: 10.6052/j.issn.1000-4750.2019.10.0615
引用本文: 邓先琪, 苏成, 马海涛. 功能梯度梁静力与动力分析的格林函数法[J]. 工程力学, 2020, 37(9): 248-256. DOI: 10.6052/j.issn.1000-4750.2019.10.0615
DENG Xian-qi, SU Cheng, MA Hai-tao. GREEN’S FUNCTION METHOD FOR STATIC AND DYNAMIC ANALYSIS OF FUNCTIONALLY GRADED BEAMS[J]. Engineering Mechanics, 2020, 37(9): 248-256. DOI: 10.6052/j.issn.1000-4750.2019.10.0615
Citation: DENG Xian-qi, SU Cheng, MA Hai-tao. GREEN’S FUNCTION METHOD FOR STATIC AND DYNAMIC ANALYSIS OF FUNCTIONALLY GRADED BEAMS[J]. Engineering Mechanics, 2020, 37(9): 248-256. DOI: 10.6052/j.issn.1000-4750.2019.10.0615

功能梯度梁静力与动力分析的格林函数法

GREEN’S FUNCTION METHOD FOR STATIC AND DYNAMIC ANALYSIS OF FUNCTIONALLY GRADED BEAMS

  • 摘要: 功能梯度梁静动态响应的数值分析方法一般局限于有限元法,存在有限元法的固有缺点,有必要发展新的数值求解方法。将功能梯度梁静力分析的控制微分方程转化为与匀质材料梁静力分析控制微分方程相一致的形式,并利用匀质材料梁静力问题的格林函数,开展功能梯度梁的静力分析。在此基础上,进一步推导获得功能梯度梁的柔度矩阵,据此建立功能梯度梁的运动方程,开展功能梯度梁的动力特性分析和动力响应分析。数值算例表明,采用格林函数法可以高效准确地分析功能梯度梁的静力响应与动力行为,验证了方法的计算精度与效率。

     

    Abstract: The numerical analysis of static and dynamic problems of functionally graded material beams is usually conducted with the finite element method and suffers from the inherent deficiencies of the method. The governing equations for static analysis of functionally graded material beams are transformed to the forms for static analysis of isotropic material beams, and the Green’s functions corresponding to isotropic material beams are used for static analysis of functionally graded material beams. On this basis, the compliance matrix of a functionally graded material beam is further derived, and the equation of motion is established and solved for the dynamic problem of the functionally graded material beam. Numerical examples show that the proposed method can analyze the static and dynamic problems of functionally graded material beams with high efficiency and accuracy, indicating the feasibility of the present approach.

     

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