1) mode superposition method
振型迭加法
1.
Considering the fuzzy-randomness of structural physical parameters,geometric dimensions and the amplitude of the load simultaneously,from the Duhamel integral,structural dynamic responses are derived by the mode superposition method.
同时考虑结构的物理参数、几何尺寸和外载荷幅值的模糊随机性,从Duham e l积分式出发,利用振型迭加法求出了结构动力响应模糊随机变量的表达式;再由随机函数的矩法推导出结构模糊随机动力响应的模糊数字特征。
2.
This paper employed the finite element method of dynamic problems as well as the theoretical and numerical solutions of mode superposition method and direct integration method to analyze the motion characteristics of the equipment.
对装载机的工作装置进行了运动分析，并针对两种典型工况对前车架作了静态以及采用振型迭加法和直接积分法进行了动态特性分析，给出了对同类结构力学分析的较为适宜的方法。
2) model superposition
振型迭加
1.
Time-history analysis can be used in nonlinear system,while model superposition can only be applied to linear system.
本文用时程分析、振型迭加和小波变换3种方法,对一个10层建筑结构的地震动力响应进行了计算和比较,三者的结果完全一致,从而说明了线性时不变系统结构动力响应的唯一性定律是正确的。
3) the principle of model superposition
振型迭加原理
1.
Basing on the basic principle of element dynamic analysis, the calculation formula of seismic acceleration of the sole rock under the condition of known ground seismic acceleration was derived and the calculation method of seismic acceleration of the sole rock was proposed by using of the principle of model superposition and Fourier transform.
从有限元动力分析的基本原理出发,利用振型迭加原理和傅立叶变换对原理,推导了由地震地面运动加速度反算地震基岩运动加速度的有限元计算公式,探讨了地震基岩运动加速度的有限元反分析计算方法;算例表明,地层对地震运动加速度有一定的放大作用,在地下结构抗震计算中应以实际基岩地震运动加速度作为地震动输入。
4) mode superposition method
振型叠加法
1.
The proposed approach can offer an exact solution for dynamic response of base-isolated structure by means of the mode superposition method in each elastic and plastic phase, between which the transitional time must be obtained and employed.
在弹性和塑性的每一个阶段分别利用振型叠加法,并通过准确地求出隔震层弹塑性转换时刻,这种求解方法能够得出结构动力响应的精确解。
2.
This paper analyzes the forced vibration response of transmission system in 200km/h AC electric locomotive during its starting period, establishes the calculating model of the driving system by using mode superposition method, calculates the forced torsional vibration response of transmission system and the dynamic load magnification factor; and analyzes the influence of excitation functi.
随着机车速度的提高,对机车传动系统的动力性能要求越来越高,对２００ｋｍ/ｈ交流电力机车传动系统在启动过程中的强迫动力响应进行了分析,建立了驱动装置的计算模型,通过振型叠加法,得到传动系统的强迫扭转动力响应。
3.
Therefore the vibration equation of the non-proportional damping of the isolated system is decoupled,and the responses of structure under earthquake excitation can be solved by the mode superposition method.
将该串联隔震体系的非比例阻尼分解为比例阻尼部分和非比例阻尼部分,应用Hamilton原理推导出非比例阻尼部分等效振型阻尼比,实现串联电气设备支架隔震体系振动方程的解耦,然后通过振型叠加法求得结构的地震响应。
5) mode superposition
振型叠加法
1.
Also,a method that combines the Fourier transform and mode superposition to solve the vibration equations is presented.
根据凸轮机构弹性动力学研究的一般步骤，介绍了凸轮机构弹性动力学研究中所用的线性，非线性离散数学模型和连续体数学模型，以及用傅立叶变换和振型叠加法解动力方程的方法。
6) modal superposition method
振型叠加法
1.
A Romberg-fast Fourier transform (R-FFT) integration algorithm based on fast Fourier transform (FFT) and numerical integration theory was proposed for modal superposition method.
基于快速傅里叶变换(FFT)和数值积分理论,提出了一种应用于振型叠加法的龙贝格快速傅里叶变换(R-FFT)积分算法。
2.
A modal superposition method for the dynamic analysis of a structure with coulomb friction is presented.
应用振型叠加法对具有库仑摩擦力的结构进行动力分析 ,用假想力矢量表示因摩擦力引起的非线性 ,用有限元求解运动方程。
补充资料：振迭
1.震恐。
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