首先研究了结构的最低阶固有频率的计算方法。
At first the method for calculating the fundamental natural frequency of structure is researched.
以提高低阶固有频率作为动态优化目标函数，对主轴系统进行了优化设计。
The elevation of the shafting system at low-lying step mode acting as an appraisal function, the optimal design of the shafting system was given.
结果表明，考虑随机几何缺陷后，系统的低阶固有频率将降低，内力阵风响应因子将升高。
It is shown that, the basic natural frequency will decrease and the internal force response factor will increase if the random geometric imperfections are taken into consideration.
本文用有限元素法建立织编机机架的力学模型，并计算了机架的低阶固有频率及相应的振型。
The natural modes and frequencies of the framework of a knit-weaving machine are determined and its mechanic model established on the basis of finite element method.
进而利用比较成熟的结构分析软件ANSYS对管系进行了模态分析，得到系统的低阶固有频率和振型。
The mode analysis was processed with current structure analysis software ANSYS. The lower natural frequency and vibrant model were counted.
本文将离心机转鼓视为一端固支、一端自由的薄壁圆筒，用瑞利能量法推导其最低阶固有频率，所得结果具有工程运算所需精度。
Treating a bowl of centrifuge as a clamped-free thin-walled cylinder, fromulas to calculate natural freguency are given by using Rayleigh's energy method.
由于箱式浮体结构的低阶固有频率很低，相应的弹性振型的响应与刚体运动耦合，结构在波浪中没有发现明显的低阶弹性模态谐振。
No significant resonance of the low flexible body modes is found due to the coupling of the responses among these modes and the rigid body modes.
通过计算得到前十阶固有频率，并分析了低阶固有模态振型。
Ten orders 'natural frequencies had been calculated and low-order vibration shape of the body structure was studied.
通过计算得到前十阶固有频率，并分析了低阶固有模态振型。
Ten orders 'natural frequencies had been calculated and low-order vibration shape of the body structure was studied.
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