本文对修改结构局部刚度和质量参数，从而使其具有给定固有频率的动力修改问题提出了一种求解方法。
In this paper, a method for shifting the natural frequency of a structure to a desired value by modifying the local stiffness and mass parameters is proposed.
从根本上讲，这些特性依赖于结构的质量和刚度，它决定了固有频率和模态振型何处存在。
Basically, there are characteristics that depend on the weight and stiffness of my structure which determine where these natural frequencies and mode shapes will exist.
讨论了流体的流速、压强变化以及固—液耦合阻尼和固—液耦合刚度对管道固有频率的影响；
The influence of flowing velocity, pressure, solid_liquid coupling damp and solid_liquid coupling stiffness on natural frequency are discussed respectively.
研究表明，涡轮泵不对称以及发动机与机架之间连接刚度弱是引起推力偏心和基频固有频率偏低的主要原因。
It is shown that the offset of propulsion force and the lower natural fundamental frequency are caused by asymmetry of turbopump and weakness of connection stiffness between propulsion and frame.
根据塑料管材环刚度计算公式绘编成计算图，该图显示出塑料管材的固有特性。
Based on formula of loop stiffness for plastic piping, calculating chart was drawn which showed inherent features of plastic piping.
但气动系统由于其固有的强非线性和低刚度的弱品质，使得其控制性能和效果不太理想。
But the control performance of the pneumatic system is not very good because of its inherent non-linearity and low-stiffness.
根据塑料管材环刚度计算公式绘编成计算图，该图显示出塑料管材的固有特性。
A working chart was constructed for calculating the loop stiffness of plastics pipes, which reflected the inherent characteristics of plastics pipe.
并联负刚度弹簧不但显著降低了隔振系统的固有频率，同时也改善了系统的阻尼特性，提高了隔振系统产生高频内共振的频率。
Paralleling negative stiffness can not only decrease the isolator's natural frequency, but also improve the damping characteristic and increase the internal resonant frequency of the isolator.
采用动态刚度阵法计算船体总振动的固有频率。
Dynamic Stiffness Matrix Method is applied to compute vibration of ship hull.
模态是结构的固有振动特性，每一阶模态都具有特定的固有频率、阻尼比、振型、模态刚度和模态质量。
Mode is structure's inherence characteristics, each mode has specifically resonant frequencies, damping values, mode shapes, mode stiffness and mode mass.
分析尾轴架的动刚度曲线，可得到尾轴架结构的固有频率。
Analyses of these curves make the natural frequencies of the shaft brackets available.
依据设计原则，利用模态刚度矩阵、模态质量矩阵和模态频率相似进行了扭振模拟机轴系的设计，扭振模拟机轴系前三阶固有特性与实际机组轴系扭振动特性基本一致。
By modal stiffness matrix, modal mass matrix and modal frequency, shaft units of simulator is designed. The former three steps natural characteristics are identical with the real units'.
结构固有的刚度极大地减少了钢材的使用吨位，同时还能抵挡加速度和结构的摇摆变形，从而为建筑物的使用者提供了较高的舒适度。
The inherent stiffness in the structure minimises steel tonnage whilst providing resistance to acceleration and sway, thereby maintaining high comfort levels for the buildings occupants.
对单自由度系统，其静刚度与固有频率的平方有正比关系。
For system of single freedom-degree, the relationship of its static stiffness and square of natural frequency is direct ratio.
空气弹簧具有变刚度特性，其固有振动频率要比钢板弹簧低得多，且不随汽车承载质量的变化而改变。
Air spring is characteristic of variable stiffness, its natural vibration frequency is much lower than that of leaf spring and will not change with load of vehicle.
根据这一振动模型，推导了齿轮副的平均单齿刚度、单对轮齿啮合综合刚度、有效质量、固有频率与临界转速等一系列计算公式。
The model is used to understand a series of formulae, for example, mean single tooth stiffness, gear pair mesh synthesizing stiffness, effective mass, nature frequency and critical rotating speed.
优化后，结构固有频率及刚度变化不大，而床身质量却大大下降，取得明显效果。
After these, the structural natural frequency changes a little, but the grinder bed mass reduces greatly, thus the obvious result is achieved.
弹性介质刚度不仅对充液圆柱壳的实固有频率影响显著，而且影响其截止轴向模态。
The rigidity effect of surrounding elastic medium is remarkable not only to the real characteristic frequencies of cylindrical shells but also to the cut-off axial mode.
介绍正负刚度并联相消原理，通过分析可知应用该原理可以有效降低系统的固有频率，减小隔振传递率。
The principle of stiffness offset with the positive and negative stiffness parallel were introduced and through analysis the natural frequency and the vibration transmissibility can be reduced.
它要求有相当高的阵面精度、刚度和强度，但有限空间和重量指标使空间与刚度，刚度与重量这些固有矛盾尖锐化。
It should have high surface precision and enough intensity and rigidity. But the limited space and weight target make the contradictions between space and rigidity, rigidity and weight.
按气体轴承刚度最大准则优化了固有节流轴承参数。
The inherent throttle bearing parameters are optimized according to the maximum stiffness of aerostatic bearing.
利用ANSYS建立了某型号高速加工中心的有限元整体分析模型，探讨了不同位置导轨的刚度变化对高速加工中心固有频率的影响。
The FE model of the highspeed machining center is established using the software ANSYS. The influence of guideway 'rigidity on natural frequency of the highspeed machining center is discussed.
斜拉桥拉索固有阻尼低、刚度小，容易引起大幅振动。
The large amplitude cable vibration often is induced due to low damping and small stiffness of stay cable.
界面法向和切向刚度越大，剪切带穿越断层并按其固有方向延伸能力越强，剪切带网络格局越明显。
For large normal and tangential rigidity, shear bands can penetrate old fault and propagate along their inherent directions and the form of networks of shear bands is very apparent.
界面法向和切向刚度越大，剪切带穿越断层并按其固有方向延伸能力越强，剪切带网络格局越明显。
For large normal and tangential rigidity, shear bands can penetrate old fault and propagate alone their inherent directions and the form of networks of shear bands is very apparent.
因此，需合理选取牵引电机吊挂关节的刚度，避免基于电机点头振动固有频率及各结构部件固有频率的振动。
Therefore, it needs to select the motor hanging rubber stiffness reasonably to avoid resonances of the structure of the driving gear.
在高的结构刚度值条件下，其第一高阶振型为跳跃式，有较大的固有频率值，振幅比也大。
Under the condition of high construction rigidity, its first high order type of vibration was of skipping type which had relatively high inherent frequency, and rather big amplitude.
应用脉动法测到的信号分析结构的固有频率和振型，利用作者提出的改进的单纯形法来识别结构刚度。
The frequencies and vibration modes of structures are analyzed with pulsating method and structural stiffness is identified with modified simplex method, which is presented by authors.
应用脉动法测到的信号分析结构的固有频率和振型，利用作者提出的改进的单纯形法来识别结构刚度。
The frequencies and vibration modes of structures are analyzed with pulsating method and structural stiffness is identified with modified simplex method, which is presented by authors.
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