轻型薄板式挡土墙振动模态理论研究。
Study on vibration modality theory for the light thin plate retaining wall.
用全息干涉图方法研究了磬的振动模态。
The vibration of qing has been studied by method of holographic interferogram.
结果表明，在诸振动模态中存在一呼吸模态。
The result shows, a breathing mode occurs in many vibrating ones.
振动模态分析是立式电机优化设计的重要步骤。
The analysis of vibration mode is an important process during the optimizing design of vertical motor.
给出了一种砌体结构质量的振动模态检测方法。
In this paper, a modal test method for quality evaluation of masonry structures is presented.
推导了弹性支承梁的横向自由振动模态的特征方程。
The latent equation of the freely vibration modes of elastic bearing beam is deduced.
本文介绍了超声波电机振动模态形式及其选择的原则。
The selective principle of ultrasonic motor's vibration mode and the form of resonance mode are introduced in this paper.
结果表明，失谐会导致系统的振动模态出现局部化现象。
It is indicated from the results that due to disorder the phenomenon of vibration mode localization appears in the system.
提出一种利用柔性结构的固有振动模态特性的振翼原理。
Making use of modal characteristics of the natural vibration of flexible structure to design the oscillating wing aircraft is proposed.
介绍了它的敏感元件的结构尺寸、振动模态以及数学模型。
The construction dimension, vibration modes and mathematical model of its sensitive element are introduced.
分析了叶片的失谐量和轮盘的转速对结构振动模态局部化的影响。
The effects of magnitude of blade disorder and disk rotating speed on the vibration mode localization are analyzed.
首先，本文对基于振动模态分析理论的损伤识别方法进行了探讨。
Firstly, the damage identification method based on vibration modal analysis theory is discussed and analyzed.
以一个含16个叶片的叶片—轮盘结构为例，分析了它的振动模态。
As an example, the modes of vibration for a bladed disk assembly with 16 blades were analyzed.
每一个振动模态可以被假设为像一个单自由度系统一样单独地响应。
Each of the vibration modes that are considered may be assumed to respond independently as a single-degree-of-freedom system.
以叶片—轮盘结构为例，研究了循环周期结构的振动模态局部化问题。
By taking example for bladed disk assembly, the localization of vibration mode in cyclic periodic structures is studied.
本文给出了一种汽轮发电机组轴系扭转振动模态对数衰减率的计算方法。
This paper presents a method for calculating the modal logarithmic decay ratio of the shaft set torsional vibration in a turbogenerator unit.
振动模态分析技术和神经网络技术是解决结构损伤诊断问题的有效工具。
Vibration modal analysis technology and neural network technology is a effective instrument to solve damage diagnose.
通过数值算例验证了体外预应力对简支梁桥振动频率和振动模态的影响。
And numerical example is adopted to explain the influence of external prestress to the vibration frequency and modality for simple beam.
研究表明，当扰动频率低于多壁碳纳米管的临界频率时，振动模态是同轴的；
The analysis shows that when the frequency is lower than the critical frequencies of the shells in MWCNT, the vibration mode is almost coaxial.
振动模态选择是超声波电机设计的重要环节，也是影响电机性能的重要因素。
The selection of vibration mode is very important during the design of ultrasonic motors. It is also a significant factor infecting motor's performance.
大型空间柔性结构是无穷维的分布式参数系统，理论上具有无穷多个振动模态。
Large space structures are infinite-dimensional distributed-parameter systems, which theoretically have infinite number of vibration modes.
文章对弯曲振动模态超声电机的设计具有指导意义，对其深入研究具有参考价值。
This paper is meaning to the design and study of the bending vibration ultrasonic motors.
结论是：随着节子个数的增加，木材振动模态的阻尼比增大，而其固有频率减小。
The conclusion is that the damping ratio will increase, and the nature frequency will decrease along with the number of knots mounting up.
所建立指数律的状态观测器，实现了以较少传感器估计系统弹性振动模态的目的。
An exponential observer based on fewer sensors is constructed so that elastic modes of the systems can be available at all instants.
简要论述了振动模态分析方法，并指出有限元分析模型在结构整体监测中的重要性。
In this paper, the vibration model analysis is briefly introduced and the importance of finite element model (FEM) in the whole monitoring of structures is stressed.
结合面法向刚度大小的参数对纵向振动模态的影响比对弯曲、扭振模态的影响显著；
The parameters reflecting normal stiffness have more obvious effects on extensional vibration mode than those on flexural mode and torsion mode.
得出，当激振点不变时，激振力级的变化与振动模态辐射的平均声压级成线性关系；
When the exciting force was constant the average level of sound radiation produced by modal vibration has a linear relationship with the level of mode shapes.
分析了叶片的失谐量、轮盘的转速以及围带的位置半径对叶片振动模态局部化的影响。
The influence of degree of disorder of blades, rotating speed of disk and position radius of shroud on the localization of vibration mode is analyzed.
利用该模型，分析了结构参数与油底壳振动模态的关系，从中总结出了一些基本规律。
Finally, the model is used to analyses the relation between structure parameters and vibration modes of the oil-pan, from which some basic laws have been summarized.
将系统振动模态分为耦合模态与弧立模态，由数组相互耦合的模态张成耦合模态子空间。
The vibration modes are divided into two classes:separated and coupled. The coupled-mode subspace is spanned by the groups of coupled modes.
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