The test result shows that clamper greatly increases only the first natural frequency.
结果表明，夹板只对第一阶固有频率有较大提高。
The first natural frequency and all natural frequencies areobtained by the power method and the QR method, respectively.
分别用幂法和QR法计算结构的第一和所有自振频率。
Fatigue life of random vibration can be calculated by the fatigue life of sinusoidal vibration under first natural frequency.
可以通过一阶固有频率下正弦振动试验试件寿命得到随机振动下试件的寿命。
The percentage of fatigue life under first natural frequency of random spectra in fatigue life of specimen decreases with decreasing stress level of random spectra.
一阶固有频率下振动在试件疲劳寿命中所占的比重随着随机载荷谱均方应力值的降低而降低。
At last, using finite element analyse software, the composite laminate camera mount is simply optimized aiming at maximizing its first natural frequency, which has an increase of 28.88%.
最后，借助有限元分析软件，对复合材料相机支架进行了以基频最大化为目标的简单优化设计，将相机支架的基频提高了28.88%。
At first the method for calculating the fundamental natural frequency of structure is researched.
首先研究了结构的最低阶固有频率的计算方法。
The natural frequency, quality factor, first mode of fold beam and Young's modulus of the double linear vibratory gyroscope were measured by the new setup.
并用此方法测量了双线性振动陀螺的固有频率、品质因子、—阶模态振型和杨氏模量。
The finite element method is used to analyse the natural vibration of a exhaust chimney with steel structure in a nuclear power plant, such as the first, the second frequency and their model.
利用有限元法分析了某核电站排气钢塔的固有振动特性，即一阶、二阶振动频率及振型。
In dynamic analysis, the natural frequency is given from the first mode to fifth mode.
在动态分析中，计算出了塔架前五阶固有频率。
Simulation with the optimized tool slide shows that the first order natural frequency is increased by 31.2% and material savings of 7.8%.
分析结果表明，优化后的主溜板在满足最大变形约束要求下，第一阶自然频率提高31.2%，材料节省7.8%。
Simulation with the optimized tool slide shows that the first order natural frequency is increased by 31.2% and material savings of 7.8%.
分析结果表明，优化后的主溜板在满足最大变形约束要求下，第一阶自然频率提高31.2%，材料节省7.8%。
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