The numerical modal analyses of the empty and full loaded open boxcar are carried out in the ANASYS software.
应用an - SYS对运煤敞车空车和重车进行计算模态分析。
Both the modal dispersion characteristics and cut off conditions are investigated through numerical and analytical approach.
我们利用数值和解析的手段对模式色散和截止特性作了细致的研究。
The numerical results show that the modal birefringence of near_rectangle core PCF is at least one order of magnitude higher than the conventional elliptical polarization_maintaining fibers (PMFs).
研究表明：类矩形芯光子晶体光纤的模式双折射比普通椭圆保偏光纤至少高一个数量级。
Numerical results show that the modal birefringence of10 ~ (-5) is obtained even under the weakly-guiding condition.
数字结果表明，即使在弱导引条件下也可获得10 ~(- 5)模式双折射。
The Single Input and Single Output(SISO)modal experiment and numerical simulation was used to study the dynamic behavior of a CFST column-H steel beam frame structure model.
方法利用单输入单输出（SISO）模态试验方法和数值模拟方法，对一榀钢管混凝土柱-H钢梁框架结构模型的动力特性进行测试分析。
An efficient numerical method for simultaneously updating mass matrix and stiffness matrix of a finite element analytical model based on incomplete modal data measured is presented.
提出一种基于不完全模态测量数据同时修正有限元质量矩阵与刚度矩阵的有效数值方法。
Based on element local frequency change ratio method and element modal strain energy ratio method, numerical study is carried on to detect the damage of the bridge.
利用单元局部频率变化率法和单元模态应变能比法，对连续梁桥进行了损伤诊断的数值模拟研究。
The severe numerical instability in complex frequency modal mass identification from frequency response function makes it difficult to identify physical parameters.
利用频响函数识别复频率模态质量存在着严重的数值计算不稳定性，给物理参数的识别造成困难。
We had made numerical and modal analysis on the dynamic feature of F320 model derrick with ANSYS software and modal analysis technique.
使用ANSYS有限元软件、实验模态分析技术对F320型石油井架模型的动态特性进行了数值与试验分析。
It is indicated by a numerical simulation of the cantilever flexible-shear structural damage identification that only low-order modal parameters are needed to identify effectively a structural damage.
通过一个悬臂弯剪型结构损伤识别的数值模拟表明，只需低阶模态参数就可有效地识别结构损伤。
The finite element model was established first, then the modal analysis was processed, and accuracy of the model was verified by comparing the theoretical solution with the numerical solution.
文中首先建立了拉索的有限元模型，对该模型进行了模态分析，并通过理论解的计算验证了数值模型的准确性。
Numerical simulation was done. The results show that it has good validity and accuracy to modal parameter identification of reticulated shell structures.
文中对该方法进行了数值模拟，结果表明，该方法能够 确保网壳结构模态参数识别的有效性和准确性。
An efficient numerical method for the finite-element model updating of damped gyroscopic system was developed based on incomplete complex modal measured data.
提出了一种基于不完备复模态测量数据修正阻尼陀螺系统有限元模型的有效数值方法。
The numerical examples explain that the method of modal parameter identification and load identification in this thesis both are reasonable, applicable for factual engineering.
文中的数值算例分别验证了模态参数辨识及动态载荷识别方法的合理性、适用性及计算程序编制的正确性。
It is indicated by a numerical simulation of the cantilever flexible shear structural damage identification that only low order modal parameters are needed to identify effectively a structural d...
通过一个悬臂弯剪型结构损伤识别的数值模拟表明，只需低阶模态参数就可有效地识别结构损伤。
Modal characteristic equations of mode HE11, TE01, TM01 are analysed with numerical method and their dispersion curves are given.
对HE11、TE01、TM 01三个低阶模的特征方程进行了数值计算，给出了它们的色散曲线。
A methodology was put forward for damage location, and damage simulating as well as numerical calculation of modal analysis was carried out on a truss plane bridge by stiffness discount.
推导了基于测试频率平方变化比的损伤定位方法，利用有限元方法对一管道结构以刚度折减法进行了损伤模拟和模态分析数值计算。
A methodology was put forward for damage location, and damage simulating as well as numerical calculation of modal analysis was carried out on a truss plane bridge by stiffness discount.
推导了基于测试频率平方变化比的损伤定位方法，利用有限元方法对一管道结构以刚度折减法进行了损伤模拟和模态分析数值计算。
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