【摘要】 为了探索体外预应力简支梁自振频率变化的内在机理,基于结构振动基本原理和哈密尔顿原理,推导了偏心直线布筋的体外预应力简支梁自振频率计算公式。利用ANSYS建立有限元模型,并对其进行模态分析,分析结果表明:采用本文方法计算偏心直线布筋的体外预应力简支梁自振频率是可靠的,对揭示体外预应力简支梁自振频率的变化规律有重要意义。更多还原

【Abstract】 In order to explore the internal mechanism of the natural vibration frequency of externally prestressed simply supported beams,the calculation formula of the natural vibration frequency of externally prestressed simply supported beams with eccentric linear reinforcement is derived based on the basic principle of structural vibration and the Hamilton principle. The finite element model is established in ANSYS and its modal analysis is carried out. The analysis results show that the calculation of the natural vibration frequency of the externally prestressed simply supported beam for the eccentric linear reinforcement is reliable according to the calculation theory given in this paper. It provides a new calculation method for the calculation of the natural vibration frequency of externally prestressed simply supported beams,and it is of great significance to reveal the variation law of the natural vibration frequency of externally prestressed simply supported beams.更多还原