摘要
以连续弹性棒质元和弹簧振子为例,从弹簧振子与弹性棒质元受力分析入手,假设介质连续、均匀、各向同性、无初始应力,依据广义胡克定律和微小形变理论,揭示在连续介质中简谐波传播能量的本质特征与基本规律。通过2种振动对比,深入理解简谐振动和简谐波质元振动的差异。
Taking the continuous elastic rod element and the spring vibrator as an example,starting from the analysis of spring force and elastic rod element,assuming that the medium is continuous,uniform,isotropic,without initial stress,according to generalized Hooke's law and micro-deformation theory,the essential characteristics and basic laws of harmonic energy in the continuum is revealed. Through the comparison of two kinds of vibration,the difference between simple harmonic vibration and simple harmonic wave is deeply understood.
出处
《北京工业职业技术学院学报》
2017年第4期52-54,61,共4页
Journal of Beijing Polytechnic College
基金
2017年北京工业职业技术学院青年基金课题(BGZYKY201752Q)
关键词
简谐波
弹性介质
能量特征
谐振动
simple harmonic wave
elastic medium
energy characteristic
harmonic vibration