模态的

A time-frequency analysis method based on HOS is proposed to study the girder gust response, and the supreme mode contributed to gust response and the modal coupling could be identified using this method.

二、提出利用基于高阶谱的时频分析研究大桥非平稳、非线性风致振动响应，能够得出对不同测点风致振动响应贡献最大的模态和耦合振动模态。

From this experiment, frequency response function could be found, and modal parameter also could be known by curve fitting, then compared with the differences of mode shape and natural frequency by using those modal parameters, also compared with finite element analysis, the results could be applied to detect the structure of beams and prevent it from damage and corrode for the safety in the future.

将实验中三种驱动器搭配加速度计实验分析结果较佳的一组方法，来从事结构之非破坏检测，探讨当固定梁有缺陷产生时，其结构之自然频率与模态振型的变化，并比较其不同缺陷处之固定梁实验模态结果，将来可应用於梁结构物损坏或腐蚀时侦测其安全性之分析。

A theory of cross correlation function s is developed in this paper that the cross correlation function s can be expressed as summations of decaying sinusoids as the impulse response functions under white noise excitation.

对互相关函数理论的进一步发展作了详细推导，探索出一条将互相关函数理论同多种经典模态分析方法相结合进行环境激励下模态分析的方法。

Then, the concept of error index for a given mode and the concept of damage indicator for all available modes were deduced.

摘 要：本文基于模态应变能的概念，给出了基于前两阶振型模态参数的结构损伤定位方法。

Aiming at the mode mixing problem caused by intermittency signal in the sifting process of empirical mode decomposition,a new solution is presented.

针对在经验模态分解筛选过程中间断信号引起的模态混叠问题，提出了一种新的解决方法。

Performance evaluation method system of hierarchical IFFCS in air-to-air gunnery mission: The IFFC essence in air-to-air gunnery mission is a problem of space pointing track. Its hierarchical structure consists of three level loops: flight control system loop, space pointing track loop and tactical mission loop.

多重递阶的综合飞行/火力控制系统空/空机炮模态性能评价方法体系；综合飞行/火力控制系统空/空机炮模态本质上是一个空间指向跟踪问题，其多重递阶结构从内到外包括三个层次的回路：飞行控制系统回路、空间指向跟踪回路和战术任务回路。

Also, the characteristics of the lower order frequencies and the lower order mode of vibration are found out.

模态分析是动力学计算的基础，为动力学分析计算提供了必要的模态参数。

According to the deformation modal of impact buckling, this paper establishes mode controlled equation on the basis of considering strain hardening and strain rate effect.

文章根据钢管受冲击屈曲变形模态，分析了应变强化和应变率效应对变形过程的影响，在此基础上建立了模态解控制方程。

Experimental modal analysis method was combined with the dynamic test under different consolidations.

运用模态分析方法获得了各加固条件下的模态参数。

The CMS formulation was got in the condition that substructures were in different modal base.

推导了不同子结构分别采用固定界面模态集和自由界面模态集时的综合方程。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。