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简谐振动初相位之唯一性浅谈 被引量:1

On the Uniqueness of Initial Phase in Simple Harmonic Vibration
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摘要 振幅、频率和相位是简谐振动的三要素.其中,相位角的周期是2π.在一个周期(-π,π]内,任意简谐振动响应的初相位必须具有唯一性.该问题常被忽视.将相位角表示成反正切函数时需要考虑反三角函数的值域.在此对部分著作中的常见错误作简要修正. Amplitude,frequency and phase are three parameters of simple harmonic vibration.The period of phase angle is 2π.The initial phase angle of any simple harmonic vibration must be unique in the interval(-π,π].This uniqueness is often overlooked.When the phase angle is expressed in the form of an arctangent function,the value range of the inverse trigonometric function needs to be considered.The common mistakes in some monographs are corrected here.
作者 张国策 聂磊 陈云 Zhang Guoce;Nie Lei;Chen Yun(School of Civil Engineering and Architecture,Hainan University,Haikou 570228,China)
出处 《动力学与控制学报》 2024年第3期88-92,共5页 Journal of Dynamics and Control
基金 国家自然科学基金资助项目(11602131,51968020) 海南省自然科学基金高层次人才项目(820RC586) 海南省科协青年科技英才学术创新计划项目(QCXM201913) 海南大学教育教学改革研究项目(hdjy1967)。
关键词 自由振动 受迫振动 初相位 free vibration forced vibration initial phase
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