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固有频率

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By means of the RITZ method,the free frequencies of the first and the second mode of the cables were given.

引用压杆屈曲函数构造两固端刚性拉索的一阶和二阶振型函数,由 RITZ法原理求得其相应的一阶和二阶固有振动频率。

Taken example for solving real engineering problem, the methods and steps for the analysis of the steering-wheel vibration is discussed.

为了解决某型轿车的转向盘振动问题,本文通过对影响转向盘振动的诸多因素逐一进行分析,结合先进的试验手段和CAE分析技术,找出了引发该轿车转向盘振动的主要原因是车轮动平衡质量不合格及固定转向柱管的仪表板横梁刚度不足,通过提高车轮动平衡质量,改进仪表板横梁设计,提高仪表板横梁的刚度和固有振动频率,结合道路试验进行主观评价,改进后的转向盘振动达到了平顺性要求。

For the digital filter design problem, the mathematics are complicated by the approximation being defined on the unit circle.

数学问题中固有的频域滤波器设计的问题是逼近理想的复杂的频率响应函数的HD的一个合理的传递函数的H就一个Mth度的分子和一个第N次度标准值复杂的变量沿着单位圆的Z = ejw 。

The multipath effect is an avoidless problem which the tracking radar and the searching radar among CIWS has to face. This paper analyses the form of the multipath effect on geometry, emphasizes the distance difference between the direct wave and the reflected wave, according to this inherent characteristic, the paper introduces the theory of HRR to the design of radars among CIWS, discusses the spike pulse technology and ultra wide hand technology which often be used, finally proposes the method of time-frequency code to obtain the high range resolution and avoid the multipath effect.

多路径效应是近程反导武器系统中的搜索雷达和跟踪雷达均无法避免的问题,文中分析了多路径效应形成的几何原理,并根据多路径效应中的直射波与反射波具有路程差的固有特性,将高距离分辨率雷达信号理论引入到近程反导武器系统的雷达中,讨论了实现高距离分辨率的窄脉冲和超宽带技术,最后提出了目前较易实现的时间-频率码合成高距离分辨率的办法。

The inherent synthesizing error is analyzed and the method of eliminating it is discussed.

讨论了固有合成频率偏差的来源和消除办法。

The spectra indicated that the structural parameters, such as natural frequencies of bodies, damping, distance among structures and time lag due to ground motion, may affect the peak value of collision force.

响应谱表明:结构参数,如固有震动频率、阻尼、结构间的间隔距离、地面运动引起的时间滞后等,都会对碰撞力的峰值产生影响。

Since the human body and organs in the body can be seen as more focused, more flexible point of vibration whose vibration inherent in the frequency infrasound vibrations, so infrasound have a stronger effect on the human body.

人体和体内器官固有振动频率均在次声震动范围内,次声波对人体有较强的作用效果。

However, because of the natural characteristics of the micro and small hole EDM, such as weak discharge energy, high pulse power supply frequency, unstable spark discharge states and small discharge gap, etc., there are still some key technical difficulties in its machining process need to be solved: the difficulties in real-time discharge states detection, in accurate control of machining process, in prediction of discharge states, in improvement of machining system precision and in on-line preparation of micro electrode, etc.

但是由于微细及小孔电火花加工自身具有的放电能量极微、脉冲电源频率高、难以获得稳定的火花放电状态以及放电间隙极小等固有特性,决定了其加工过程仍然存在放电状态实时检测方法单一、加工过程难于准确控制、放电状态难于预测、加工系统精度提高困难和微小电极在线制备困难等关键性技术难点,亟待突破和解决。

The vibration velocity and sound radiation power curves of submerged cylindrical shell, has strong resonant characteristics. It can be described by resonance radiation formulas, which include superposition of inherence vibration modes, by using resonance radiation theory .

本文为验证共振辐射理论,对无限长和有限长圆柱壳体,首先计算了复共振频率并分析其固有振动特性,然后结合共振辐射理论讨论壳体振动和声辐射中各振动模式的贡献及其作用特性。

The Major Planet Carriers Topology Optimization needs to submit to the intensity conditions when its Structure Stiffness and Nature Frequency change as little as it can.

大行星架结构拓扑优化需要在满足强度条件的前提下,使得结构的刚度、固有振动频率改变最小。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。