模态的

Based on the wave equation in the acoustic fluid space and the theory of thin-wall structure, the uncoupling error in low frequency range about the nonsymmetrical coupled structure-acoustic analysis equation is studied.

该对称模型特征值的非负性及特征问题的可降阶性也在本文中进行了深入研究，同时指出了在复模态分析中应当注意的问题；（2）由声空间波动方程和薄板理论出发，对非对称声振耦合方程的低频解耦误差问题进行了研究。

In this paper, a procedure of nonlinear analysis of the cable-stayed bridge was developed based on the nonlinear theory of structures using the finite element method, in which the vehicle-bridge interaction element based on the concept of dynamic condensation is used. The influence of vehicles on the response of the cable-stayed bridge is studied by employing the spung mass model and the bridge model with and without considering cable vibration modes.

本文拟应用非线性力学分析程序与有限元素数值计算法，建立斜张桥的非线性分析程序，应用VBI的车桥互制元素配合动态浓缩的观念，以悬浮移动质量模拟车体对斜张桥的影响，并对考虑与不考虑缆索振动模态两种分析模型，做一对应分析比较。

Based on the model, a program is put forward in microcomputer, which is achieved by the substructural model synthesis method.

在算法上，采用了节省内存，计算效率高的动态子结构模态综合法，实现了本文提出的桥墩空间动力分析模型的微机计算，为桥墩振动分析、地震力估算与病害桥墩的状态模拟提供了基础。

Through Iris Marion Young's "feminine body"(socialisation of side space, the three modals of the mobility of feminine body, and the spatial features of the mobility of feminine body), this research is to analyse female artistic gymnasts' body experience in their speciality and other activities and their experience in ball playing.

本研究主要目的在於透过Iris Marion Young的「阴性身体」：侧边空间社会化、阴性身体活动力的三模态及阴性身体活动力的空间性来分析女性竞技体操选手在专项、非专项的身体经验及打球经验。

There are some variances between them. In the guyed mast' wind resistance design, these differences are inessential if they are within the error permission.

本文采用基于模态分析的方法，通过建立桅杆结构的线性化有限元动力分析模型，运用结构在模拟风荷载下的有限测点风振响应数据识别了作用在结构上的风荷载时程。

Studying the effects of the relation between structural mode shape and direction of engine's shaking force on motorcycle's vibration is the subject of this paper. The studying method is based on test in association with the structural dynamic theory.

以实车量测的方式配合基本结构动态理论讨论机车引擎运转之振动传递特性，整车结构模态振型与引擎摇动力两者之间的关系对振动环境的影响是本篇论文的主题。

Based on the physical characteristics of chatter marks, the interaction between marks and vibration of rolling mill is described. The effect of rollers, work roller bearings, spindle coupling clamp and roll grinding machines on chatter marks was studied with vibration measurement and mode analysis for both mill and roll grinding machine.

从振动纹的物理特征分析入手，阐述了振动纹与轧机振动之间的关系，通过对轧辊与磨床的振动测试和模态分析研究了轧辊辊系、工作辊轴承、主传动接轴和轧辊磨床对振动纹的影响。

Validated by the experimental results of direct-connected test for RBCC, a bias less than 10% is acquired, proving the feasibility on the following numerical study.

采用RBCC地面直连实验结果对模型进行了校验，计算结果与实验结果的相对误差小于10％，表明该模型用于火箭引射模态性能分析所获得的结果具有一定的可信度，可用于本文的后续研究。

The major work is as follows: I make the comparing test to check up the two acoustic emission theory's fundamental hypothesis and get that merit and limit of two method, which is help to find the best applying area for two acoustic emission method.

主要完成的工作如下：通过对比试验来验证参数式声发射技术和模态式声发射技术的理论，分析两种声发射技术的优缺点，找到各自最佳的应用范围。

Chapter seven studies the methods of finding resonance frequency of centrifugal worm housing, analyses the relationship between the sound radiation of fan and wheel tip velocity index under different worm housing sound impedance and a new noise control method is presented for centrifugal fan.

第七章，研究了离心风机蜗壳基频共振频率及高阶模态频率的确定方法，分析了蜗壳声阻抗及其对叶轮声辐射轮缘速度指数的影响，为风机的降噪提供了一种新的途径。

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。