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求解动荷载作用下多层粘弹性半空间轴对称问题的精确刚度矩阵法 被引量:13
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作者 钟阳 陈静云 +1 位作者 王龙 李玉华 《计算力学学报》 EI CAS CSCD 北大核心 2003年第6期749-755,共7页
利用Laplace-Hankel联合积分变换,推导出了单层粘弹性半空间轴对称问题在动荷载作用下,层间完全接触情况的刚度矩阵,然后按传统的有限元方法组成总体刚度矩阵。通过求解由总体刚度矩阵所构成的代数方程就可解出动荷载作用下多层粘弹性... 利用Laplace-Hankel联合积分变换,推导出了单层粘弹性半空间轴对称问题在动荷载作用下,层间完全接触情况的刚度矩阵,然后按传统的有限元方法组成总体刚度矩阵。通过求解由总体刚度矩阵所构成的代数方程就可解出动荷载作用下多层粘弹性半空间轴对称问题的矩阵。由于刚度矩阵的元素中只含有负指数项,计算时不会出现溢出的现象。本文还成功地应用了Durbin的Laplace逆变换的数值方法,求解出了多层粘弹性体的时域解。最后,文中还给出了路面动弯沉的计算结果与实测结果的对比来证明推导结果的准确性。 展开更多
关键词 多层粘弹体半空间 刚度矩阵 积分变换 路面动弯沉 矩阵逆变换 有限元法
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Finite Element Modeling and Parametric Analysis of Pavement Dynamic Responses under Moving Vehicle Load 被引量:3
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作者 LIU Xiaolan ZHANG Xianmin 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第3期490-500,共11页
This paper intends to develop finite element models that can simulate vehicle load moving on pavement system and reflect the pavement response of vehicle and pavement interaction.We conduct parametric analysis conside... This paper intends to develop finite element models that can simulate vehicle load moving on pavement system and reflect the pavement response of vehicle and pavement interaction.We conduct parametric analysis considering the influences of asphalt concrete layer modulus and thickness,base layer modulus and thickness,and subgrade modulus on pavement surface displacement,frequency,and strain response.The analysis findings are fruitful.Both the displacement basin width and maximum value of dynamic surface displacements are larger than those of static surface displacements.The frequency is positively correlated with the pavement structure moduli,and negatively correlated with the pavement structure thicknesses.The shape of dynamic and static tensile strain is similar along the depth of the pavement structure.The maximum value of dynamic tensile strain is larger than that of static tensile strain.The frequency of entire pavement structure holds more significant influence than the surface displacement and strain do.The subgrade modulus has a significant effect on surface displacement,frequency and strain. 展开更多
关键词 pavement dynamic response vehicle load surface displacement FREQUENCY STRAIN
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