摘要
利用能量分析的方法,首先考虑定义在三维半无穷柱体上的波动方程,当空间变量趋于无穷时,证明其解或者指数式增长或者指数式衰减;其次,考虑定义在球面外部区域上的波动方程,证明其解随半径的二择一结果;最后,证明对于非线性弹性方程,二择性定理仍有效.
By using the method of energy analysis,firstly,we considered the wave equation defined on a three-dimensional semi-infinite cylinde r.When the spatial variable approached infinity,we proved that the solution of the equation either grew exponentially or decayed exponentially.Secondly,we c onsidered the wave equation defined on the exterior region of the sphere,and proved the alternative result of its solution with radius.Finally,we proved that the alternative theorem was still valid for nonlinear elastic equations.
作者
李远飞
郭连红
曾鹏
LI Yuanfei;GUO Lianhong;ZENG Peng(School of Data Science,Huashang College Guangdong University of Finance&Economics,Guangzhou 511300,China)
出处
《吉林大学学报(理学版)》
CAS
北大核心
2021年第2期196-206,共11页
Journal of Jilin University:Science Edition
基金
广东省普通高校人文社科类创新团队项目(批准号:2020WCXTD008)
广东省普通高校重点项目(自然科学)(批准号:2019KZDXM042).
关键词
波动方程
能量分析
外部区域
弹性方程
wave equation
energy analysis
exterior region
elastic equation