非模态的

A new method of modal decomposition based on time-frequency filter is proposed in this paper.

应用非平稳信号的时频滤波进行多自由度时变线性系统的模态分解。

Based on the improved local piston theory , this paper presents the matrix expression of generalized aerodynamic forces expressed by the generalized coordinates.

基于改进的当地流活塞理论，推导了用模态坐标表示的弹性振动翼面的非定常广义气动力表达式。

In accordance with the situation that the damping was the non-classical damping,the structure was asymmetric,and random wind spectrum was irrational fraction wind spectrum,the equations obtained were decoupled with the complex mode theory.

建立运动方程，用第一振型将主体结构展开，针对非经典阻尼和非对称结构以及脉动风谱为非有理分式风谱的情况，运用复模态理论将所得方程进行解耦，获得了以第一振型表示的结构随机风振响应的解析解。

For X2105C-1 diesel crankshaft, the foregoing three non-zero modal may cause resonance.

对X2105C-1型柴油机曲轴而言，前三阶非零模态可能引起曲轴的共振。

He also claimed that the modal system K45is the appropriate choice to base on.K.

他认为以模态系统K45为基础的非单调逻辑是合适的选择，K。

The cross-section of the FGPM pipe is buckled in the mode of axisymmetric torsion because of nonhomogeneity. The thickness shear stress is observed in the mode of axisymmetric longitudinal wave.

对管而言，由于材料的非均匀分布导致在轴对称扭转波模态中出现了横截面翘曲现象，轴对称纵向波也出现厚度剪切应力。

Results The first five calculated nonrigid modes of the engine block are well agreed with the tested ones.

结果 计算出机体的前五阶非刚体模态，与试验结果相对照比较吻合。

A general matrix perturbation method for complex modes using singular value decomposition;2. The modal character,the error of the substituting by real modes and the best way to extract real modes from complex modes are discussed.

建立运动方程，用第一振型将主体结构展开，针对非经典阻尼和非对称结构以及脉动风谱为非有理分式风谱的情况，运用复模态理论将所得方程进行解耦，获得了以第一振型表示的结构随机风振响应的解析解。

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 the present study, the effect of centrifugal force was investigated by three dimensional finite element analyses; the vibration characters of random mistuned blade-disc were also being investigated by probability methods and the Young's modulus of material of all blades are regarded as random parameters.

结果表明，离心力对失调叶片轮盘系统局部化振动有减弱作用；所有叶片弹性模量在5%误差范围的随机失调系统，其固有频率与非失调相差很小，即失调叶片—轮盘系统可以按照循环对称结构进行模态分析。

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。