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- The relationship between the damage index and damage was studied by the analysis of the modal's undamped free vibration. 通过对模型的无阻尼自由振动分析研究损伤指标与损伤之间的关系；
- The relationship between the damage index and damage was studied by the analysis of the modal’s undamped free vibration. 通过对模型的无阻尼自由振动分析研究损伤指标与损伤之间的关系;
- After the action of an initial disturbance, the vibration of a system around its equilibrium position under the action of only a restoring force is called an undamped free vibration. 物体受到初干扰后，仅在系统的恢复力作用下在其平衡位置附近的振动称为无阻尼自由振动。
- undamped free vibration for one-degree-of freedom systems 单自由度无阻尼自由振动
- Amulti-mode solution is presented in the form of generalized double Fourier series with time-dependentcoefficients determined by the method of harmonic balance for undamped free vibrations. 给出了以广义双富里哀级数表示的无阻尼自由振动下的多模态解，其中与时间相关的系数由谐波平衡法确定。
- Any system capable of a free vibration without external force is a counter example, e.g. a wire in the piano. 任何一个无外力而能自由振动的系统就是一个反例，譬如钢琴中的一条钢丝。
- Highly accurate results are tabulated for the free vibration buckling and bending. 文后用图表给出高精度的自由振动、屈曲和弯曲计算结果。
- The free vibration characteristics of bar-type fiber optic hydrophone unit were investigated in this paper. 光纤水听器探头是光纤水听器系统的基础。
- The element-free method(EFM) is used to study the free vibration of the high-rise tube structures. 用无网格法研究高层筒体结构的自由振动问题。
- The analysis for free vibration of ring-stiffened circular cylindrical shell with variable thickness was presented. 分析了环肋变厚度圆柱壳的自振特性。
- The finite element model of the free vibration for the rigid suspension catenary and pantograph is set up. 建立刚性悬挂接触网的自由振动有限元模型,计算其固有频率和振型。
- Reddy J.N:.:Free vibration of antisymmetric angle-ply laminatd plates including transverse shear deformation by the finite element method[J]. 林敦祥;倪荣根.;预测纤维增强复合材料层压板固有频率振型及模态阻尼的有限元算法[J]
- In this paper, a free vibration study of arbitrary quadrilateral thick plates by the spline least spuare method was presented. 本文用样条最小二乘法求解任意四边形厚板的自由振动问题。
- In this paper,a solution in the form of Fourer-Bessel double series with supplementary terms is proposed to analyse free vibration of a sector plate. 本文从富氏级数的理论出发，对弹性地基扇形板的弯曲问题，提出了一种应用范围比较广的、便于计算的解析形式的解法。
- The inherent frequency of the microbeam resonator is determined by analyzing the free vibration of the microbeam (including the base structure). 通过对微梁 (包括基座 )的自由振动分析确定了微梁共振器的固有频率。
- Free vibration analysis of simply supported FG cylindrical shells for four sets of in-plane boundary conditions is performed. 摘要：对四组带平面内边界条件的简支梯度柱形壳进行自由振动分析。
- The symmetric and unti -symmetric free vibration problems of thick plate with the fixed and simple support edge conditions are solved. 求解了厚圆板在周边固支和简支条件下的对称与反对称的自由振动问题。
- The essay analyses free vibration problem of laying bed build-up board of antisymmetry angle with spline finite element method. 本文用样条有限元法;分析了反对称角铺设层合板的自由振动问题.
- Analysis for transverse free vibration of a longitudinally moving fabric is put forward here, with the calculating formula for natural frequencies of the fabric being introduced. 因此对纵向运动织物的自由振动进行了理论分析,给出了其固有频率的计算公式,并对固有频率的几个影响参数进行了讨论。
- Reading occupies most of my free time. 阅读占去了我大部分的闲暇时间。
