查询词典 modal

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。

Moreover, the molecular weight of polyethely and its distribution or even the physical properties could be adjusted by changing the non-cyclopentadiene ligand; and bi-or single modal polyethylene could be realized in one system according to the different preparation methods and conditions of CpTiCl.

由于非茂配体的可选择范围很广，通过改变半茂钛配合物中的非茂配体，可以调节半茂体系聚合产物的分子量及分子量分布，乃至聚合物的物理性能；还可以根据制备方法和反应条件的不同，实现同一体系内获得双峰或单峰分子量分布聚合物的目的。

A four\|node piezoelectric composite laminated plated element was implemented for dynamic analysis of adaptive structure. The damping ratios of truncated models were considered as the control objects, so that each of the structural modal oscillation could decay rapidly. Hence, the structural oscillation was effectively controlled.

利用四节点压电复合材料层合板单元进行自适应结构的有限元动力分析；采用模态控制方法，将结构的各阶模态的阻尼比作为控制目标，并以此计算出各压电片的控制电压，达到控制结构振动的目的。

Could modal v .

可以

Second, the design, and static and modal analysis of the crankshaft and counterbalance shaft are presented.

再次，对发动机曲轴和平衡轴进行了设计和分析，应用有限元法对曲轴及平衡轴进行了静力学和模态计算与分析，结果表明所设计的曲轴及平衡轴满足设计要求。

A frequency domain poly reference modal identification method under operational conditions was presented on the basis of the cross correlation function of measured responses to solve the only output problem.

针对工程实际情况，从实测响应间的互相关函数入手，推导出适用于工作状态下的频域多参考点模态识别法，然后采用一飞机模型对该方法进行了试验验证。

A method of cross power spectral density between responses is derived and a poly reference modal analysis method using cross power spectral density method in frequency domain is presented in this paper.

对各测点响应的互功率谱密度函数进行了详细推导，提出了一种基于互功率谱密度的频域多参点辨识法，这意味着许多原本利用频响函数的传统频域识别法可以很容易地用于工作状态下的模态识别，大大开阔了未知激励下模态识别的视野。

ANSYS, the finite element analysis software, is applied to the static and modal analysis of the machine-body crossbeam.

运用有限元分析软件ANSYS对机床的关键零件——床身大梁进行静态和模态分析。

Based on the method of modal analysis, it can be concluded that ANSYS has directive values to dynamic simulation and structural optimization of crossbeam, and the research has laid a foundation for the harmonic response analysis of the next step.

通过模态分析法，可以看出ANSYS对横梁的动态仿真和结构优化有一定的指导意义，也为下一步的谐响应分析提供依据。

The quare author association turn on goes into the request of the library of quinonoid formula, vs the MS SQL Server2000 data base management system, SQL language element, the VB application program design, the VB data nbank technique steered the more thorough study and appliances, cardinal terminate to manage the demand analysis of the system to the book, the function shuttering cake curtate, the data nbank modal analysis, and designed the data nbank structure and application programs thereof.

因此本人结合开入式图书馆的要求，对MS SQL Server2000数据库管理系统、SQL语言原理、VB应用程序设计，VB数据库技术进行了较深入的学习和应用，主要完成对图书管理系统的需求分析、功能模块划分、数据库模式分析，并由此设计了数据库结构和应用程序。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。