【摘要】 利用有限元法研究了圆柱壳结构的振动模态特性,分析圆柱壳结构参数对振动模态的影响,数值计算结果表明,随着管道直径的增大,模态密度会增大,并且周向频率存在着置换性等特点。研究得到的圆柱壳结构的周向和轴向模态的变化规律,为管道系统的动态可靠性设计提供理论依据。更多还原

【Abstract】 This paper studies the vibration modal characteristics of cylindrical shell structure by means of finite element method. The aim is to analyze the variation of vibration modes due to the changes of the structure parameters of the cylindrical shell. The numerical results show that the density of the modal increases with pipe enlarging in diameter, and the circumferential frequencies follows a permutation rule. The results provide the theoretical basis for the reliable designing of piping system.更多还原