华中科技大学学报（自然科学版）2013，Vol.41Issue(1)：111-116,6.
螺旋杆结构中弹性导波频散特性研究
Disperdsion of elastic guided wave in helical rods
摘要
Abstract
To find rules of guided wave in helix, the elasticity governing equations in helical coordinate system was inextensible expressed and a semi-analytical finite element method was applied to calculate dispersion equation of circular helical rod. The dispersion computation results proved that cut-off frequency occured on lower modes of elastic guided wave in outer rod of steel strand, such as L(0,1) , T(0,1) and F(1,1). Then the phase velocity and energy velocity dispersion curves were numerically calculated for helical cylinder spring and helical antenna. The result shows that; a. cut-off frequency and mode separation in dispersion curves appear generally on different helical structure; b. the equations deduced in helical coordinate system is available for the dispersion calculation and analysis; c. Energy velocity dispersion curve between cylinder helical spring and cylinder loop is similar in middle section, so all similar between outer rod of steel strand and cylinder rod; d. Different helical antenna varies in dispersion curves.关键词
弹性导波/频散/螺旋/钢绞线/弹簧/螺旋天线Key words
elastic guided wave/ dispersion/ helix/ steel strand/ spring/ helical antenna分类
数理科学引用本文复制引用
周方俊,王悦民,申传俊,孙丰瑞..螺旋杆结构中弹性导波频散特性研究[J].华中科技大学学报（自然科学版）,2013,41(1):111-116,6.基金项目
中国博士后科学基金资助项目(20110491881). （20110491881）
