该实验方法对于采用单头激光测振仪测试结构的三维整体模态具有一定的参考价值。
This experiment method has some reference value on testing the 3-dimension modal shapes of a structure by using a single scanning laser vibrometer.
在此基础上研究了波纹形状、腹板整体外形尺寸和钢腹板厚度等因素对波纹钢腹板剪切屈曲极限荷载和屈曲模态的影响。
On this basis, the influences of corrugation configuration, the overall dimensions and steel thickness of corrugated webs to ultimate shear bucking load and buckling mode are investigated.
简要论述了振动模态分析方法，并指出有限元分析模型在结构整体监测中的重要性。
In this paper, the vibration model analysis is briefly introduced and the importance of finite element model (FEM) in the whole monitoring of structures is stressed.
为了研究曲轴出现裂纹时的情况，本文对整体曲轴进行了振动模态分析，分析了带皮带轮和飞轮的曲轴和单独曲轴两种情况。
During the analysis of the crankshaft with a crack, the vibration mode analysis of crankshaft which includes singularity and with flywheel and pulley has been made in this paper.
采用该法可显著提高模态参数的整体识别精度。
Using the new algorithm, the higher precision of the global identification of modal parameters is obtained.
提出了整体频响函数的新概念(GFRF).以振型平方和的形式对全部频响函数进行加权组合，建立了多输入多输出模态参数的识别模型。
A concept of global frequency response function (GFRF) has been presented. The MIMO modal parameter identification modal has been established, based on the weighting sum of modal shape squares.
对不同的脱层损伤尺寸，层合板分别有整体、混合和局部三种屈曲模态，穿透脱层和埋藏脱层的层合板其临界载荷的变化规律是相同的。
The change in critical load value of both composite laminate plates with embedded and through-width delamination shows the same pattern for various delamination size.
利用框架结构的整体振动模态信息进行局部损伤的判别具有明显的局限性。
Using the global modal information of a frame to diagnose local damage has obvious limits.
本文应用非线性有限元法，对考虑初始缺陷的扭壳、扭网壳进行整体稳定分析，获得了临界状态时的失稳模态和临界荷载。
In this paper, the nonlinear FEM is used to analyze the general stability of torsional shell and torsional reticulated shell with original imperfections.
本文应用非线性有限元法，对考虑初始缺陷的扭壳、扭网壳进行整体稳定分析，获得了临界状态时的失稳模态和临界荷载。
In this paper, the nonlinear FEM is used to analyze the general stability of torsional shell and torsional reticulated shell with original imperfections.
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