基于测量数据的修正，模态频率误差在3%以内。
When experimental data is used, error of modal frequencies is less than 3%.
封装结构的模态频率随着灌封胶弹性模量的增大而增大。
The modal frequency of the packaging structure increases with the elastic modulus of potting material.
经验模态频率分解是正交分解，有很好的性质和频率意义。
The empirical mode frequency decomposition is orthogonal and possesses good behaviour.
对结构的振动特性进行了测试，得到了不同温度下的模态频率变化。
The vibration characteristic of the smart structure is measured to obtain the variety of model frequency at different temperatures.
根据陀螺驱动模态频率和检测模态的频率匹配，优化了其结构尺寸。
According to matching of driving mode frequency and detection mode frequency, the structure dimensions are optimized.
横向联系体的存在减小了纵向裂缝对横向正对称弯曲模态频率的影响。
Therefore, the horizontal linkages system reduced the effect of the longitudinal cracks on the positively symmetrical transverse bending mode frequency.
利用模态频率修正技术，考虑部件结构优化时，各部件之间模态频率的分离。
To keep frequency separation of components one another, the technique of mode frequency separation was applied while the structure of components was optimized.
对现役钻机底座做了现场振动测试，得到频响函数曲线及前10阶模态频率。
On-site vibration test of the servicing rig substructure is made, and the frequency response function curve and preceding 10 modes frequency are obtained.
建立齿轮箱三维有限元模型，采用结构有限元法计算齿轮箱模态频率和振动响应。
Modal frequency and vibration response of the gear box are computed by structural FEM with a 3-d FE model.
提出了利用模态频率、模态振型和模态柔度组合指标作为神经网络修正的输入参数。
And we suggest that mode frequencies, mode shapes and mode flexibility are regarded as input parameters of neural network modification.
提出了利用模态频率、模态振型和模态柔度组合指标作为神经网络修正的输入参数。
The mode flexibility and the mode frequency were introduced to the input parameter of neural network system.
本文尝试利用有限元法通过计算机模拟来研究穿孔板吸声结构的模态频率和布置位置。
This paper attempts to use finite element method through computer simulation to study the absorption characteristics of the perforated-panel absorbers.
为了提高结构的动态刚度，可通过修改直线滚动导轨的结构，使低阶模态频率相应提高。
The dynamic characteristic of linear rolling guide affected by modal frequency and modal shape was studied.
模拟结果表明，该微动作器的第一模态频率远低于第二模态，镜子的位移由梁的扭转引起。
The simulation shows that the first mode frequency for performance is near 1000Hz, which is much lower than that of the second mode. The displacement of mirror is caused by the torsion of beam.
为了准确识别裂纹的位置和提高识别的精度，提出了采用模态频率的变化来识别裂纹的方法。
In order to discern position of crack accurately and improve precision discerned, method to discern crack has been proposed adopting the change of mode frequency.
指出传力杆模型对模态频率和主振型有直接影响，动力分析中应当考虑接缝的剪力传递和弯矩传递。
The transfer of shearing and moment must be considered in dynamic analysis because the model of dowel bar affects the modal frequency and modal shape directly.
简要介绍了用频域参数识别方法和时域参数识别方法识别模态频率和阻尼的基本原理和基本数学模型。
It Outlines the fundamentals and the basic mathematical model of identifying modal frequency and damping by means of parameter identification with frequency domain and time domain.
介绍常见的汽车振动噪声隔离技术，其中对能有效防止共振发生的整车模态频率规划表进行详细介绍。
The table of programming natural frequencies which layouts the natural frequencies of all subsystem of the vehicle in the process of design is one of the effective ways to isolate resonance.
提出了一种基于模态频率的声信号频域特征信息提取方法，并将该方法用于堆垛机结构的冲击载荷分类识别研究。
A new approach is presented for feature extraction from sound signals generated by the structure sound radiation in frequency domain using modal frequency.
该模型的计算结果表明，立管的模态振型、模态频率与涡激振动响应高度耦合，并且对于低质量比的情况尤为明显。
It shows that the modal shape and mode frequency are highly coupled with the VIV response of a Marine riser with low mass ratio.
通过冲击损伤试件的实验分析表明，由于结构损伤的出现压电阻抗谱中的模态频率及其阻抗幅值等特征信息将发生变化。
Experimental results on impact damaged pieces show that the presence of structure damages makes such characteristic information as mode frequency and value of piezoelectric impedance changed.
对某全承载式大客车进行了结构有限元分析，研究了该客车结构强度、振动模态频率、质量等多个性能目标的优化设计问题。
Structural FE analysis on an integral bus is performed, in which optimal design of multiple performance objectives of structural strength, vibration modal frequency and mass is researched.
通过对频响函数的测试，获得了某型柴油发电机组隔振系统各阶刚体模态频率和弹性模态频率，分析了该机组振源和振动特点。
In order to optimizing the vibration isolation of some diesel generator set, an analysis of the vibration character and excitation forces of it is presented through theory study and vibration testing.
通过现场试验实测结构的模态频率，根据未锈裂结构的模态频率识别出结构的实际支承条件，建立现场试验结构的有限元模型。
Real bearing condition of structures is identified according to measured modal frequencies of undamaged structures. The finite element model on in situ test structure is established.
通过对修正前后模型模态频率与基准模型模态频率在测试频段内外的对比，证实了修正后模型具有良好的复现能力和预测能力。
A comparison of the modal frequencies of the non-updated and updated FEM and the benchmark FEM proves the reappearance and prediction ability of the updated FEM.
为使第二阶模态频率避开发动机一阶惯性力频率，文中对扶手架的质量、刚度进行局部修改，结果使手把振动有较大幅度的下降。
To separate these frequencies, we make a local modification to mass and stiffness of the handle and results in the vibration on the handle of walking tractor to reduce considerably.
第一阶模态振型相对均值系统的变化很小。一般地，结构参数的随机变异对模态振型均值的影响大于对模态频率、模态阻尼比均值的影响。
In general, the variation of structure parameters has more effect on the mean values of mode than those of modal frequencies and modal damping ratios.
第一阶模态振型相对均值系统的变化很小。一般地，结构参数的随机变异对模态振型均值的影响大于对模态频率、模态阻尼比均值的影响。
In general, the variation of structure parameters has more effect on the mean values of mode than those of modal frequencies and modal damping ratios.
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