模态展开法是模型降阶中常采用的方法。
建立梁的非线性弯曲方程，并求出模态展开解。
The nonlinear model of the composite beam is established and the modal expansion solution is obtained.
声辐射行为可用辐射模态和声场分布模态展开表示。
The radiation behavior of the vibrating surface can be expressed by expansions of the radiation modes and the field distribution modes.
本文建立了粘弹阻尼结构频响函数计算的高精度模态展开法。
An accurate modal superposition method for calculating frequency response function of viscoelastically damped structures is put forward.
模态展开法是计算特征向量摄动量的常用方法之一，但当高阶模态被截断时。
The modal superposition method is often used for computing the Perturbation of eigenvectors in the modification for structural and correCtion for model.
基于模态展开和幂级数展开原理，提出了一种频响函数灵敏度分析的模态展开法。
Based on the theory of modal superposition and power series expansion, a modal superposition method for the sensitivity analysis of FRF is proposed in this paper.
本文提出一种基于模态展开和幂级数展开的混合方案，用于简化结构凝聚动刚度的计算。
A mixed scheme based on fixed mode expansion and power series expansion is suggested to simplify the calculation of the condensed dynamic rigidity of a structure.
提出一种连续系统动柔度的混合展开表达式，它的前面几项是模态展开，其余各项是幂级数展开。
In this paper a mixed expansion expression for dynamic flexibility of continuous systems is derived.
提出一种连续系统动柔度的混合展开表达式，它的前面几项是模态展开，其余各项是幂级数展开。
In this paper a mixed expansion expression for dynamic flexibility of continuous systems is derived. The frist few terms of the expression are a sum of modes, the other terms are power series.
由自感知电压引入速度负反馈闭环控制，并由假设模态法将位移按模态展开，求解了悬臂梁结构的动态特性；
The mathematical models based on the assumed modes method and a closed loop velocity feed back control law are developed to describe the flexural vibration dynamic behaviors.
首先回顾经典的位移展开定理和模态叠加原理。
The classical displacement expansion theorem and the modal aggregation principle are discussed at the beginning of the paper.
为此，考虑到高阶模态的影响，提出了基于改进一阶摄动法的模态高精度展开法，算例表明，此方法能显著地改善摄动特征解的精度。
Taking higher frequency modes into account, an accurate expansion method based on the improved first-order perturbation is put forward, which can improve the precise of modes obviously.
说明了剩余导纳展开式在模态综合自由度减缩中的应用。
Finally, an explanation was given about the application of the expansion series of residual admittance in reduction o...
详细推导了多自由度结构多测点加速度响应的互功率谱模态矩阵展开式。
The modal matrix expansion of the cross power spectra of the multi-measurement acceleration response in the multi-DOF structure is derived in detail.
说明了剩余导纳展开式在模态综合自由度减缩中的应用。
Finally, an explanation was given about the application of the expansion series of residual admittance in reduction of degrees of freedom in modal synthesis.
说明了剩余导纳展开式在模态综合自由度减缩中的应用。
Finally, an explanation was given about the application of the expansion series of residual admittance in reduction of degrees of freedom in modal synthesis.
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