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最低固有频率
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  lowest natural frequency
     This paper, following energy principle, derived the calculation formula for finding out the lowest natural frequency thin-plate of the elastic rectangular thin-plate with holes under various coinditions.
     本文根据能量原理,导出了各种不同支承条件下求解弹性开孔矩形薄板最低固有频率的计算公式。
短句来源
     Nowadays, there is no formula for calculating the lowest natural frequency for the rectangular thin-plate with holes, but in actual engineefing, there are many thin-plates with holrs, the calculation of the coherent frequency can be solved by this formula.
     目前,对于开孔矩形薄板没有计算其最低固有频率的公式,而工程实际中开孔薄板很多,对于它们固有频率的计算,可用本文导出的公式来求解。
短句来源
     Although there exists no fixed circumferential harmonic number corresponding to the lowest natural frequency of bellow, the symmetric and lower order non axisymmetric modes are in the absolute predominance, while the higher order modes play an unimportant role in its dynamic analysis.
     算例结果表明 ,波纹管不存在一个最低固有频率对应的固定环向波数 ,但其轴对称振型和低阶非轴对称振型在动态分析中占绝对优势 ,高阶振型的作用并不明显。
短句来源
     When circumjacent load makes the lowest natural frequency zero,critical load is obtained.
     当周边面力使夹层圆板的最低固有频率为零时,就可获得临界载荷的值.
短句来源
  “最低固有频率”译为未确定词的双语例句
     Finding Out the Lowest Natyral Frequency Rectangular Thin-plate With Holes by Energy Method
     用能量法求解带孔矩形薄板的最低固有频率
短句来源
     Through the measurements and analysis on the angular vibration of experimental engine, it showed that the minimum natural frequency of angular vibration is about 100Hz, and it meets the demands of the angular acceleration fluctuate method on the shafting rigidity at lower speeds, and also meets the 0.5 order phase diagnosemethod on the vibration mode of shafting angular vibration through out the working speed.
     对试验发动机(F23B发动机)进行的角振动测量分析表明:该发动机轴系角振动的最低固有频率在100Hz附近,故在低转速时满足角加速度增量法对轴系刚度的要求,并在整个工作转速范围内满足0.5谐次相位诊断法对轴系角振动振型的要求。
短句来源
     A method of minimum weight design with the lowest frequen- cy as the constraint frequency is provided, and the iterative formulas and convergence criteria are found.
     构造了一种以结构最低固有频率作为约束频率的结构最轻重量设计方法,并建立了相应的迭代公式和收敛准则。
短句来源
     This paper discusses by energy theorem the method of approximate computation for the lowest eigenfrequencies of rectangular plates, on which there are symmetrical concentrated masses, supported at corner points.
     本文用能量原理讨论在四角点被支承的矩形板上有对称的集中质量时计算最低固有频率的近似方法.
短句来源
     The lowest resonant frequency of the membrane is about two octaves higher than this frequency.
     膜的最低固有频率比这频率约高二倍。
短句来源
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  相似匹配句对
     Simple Analysis for Natural Frequencies
     关于固有频率的浅析
短句来源
     Computer Simulation of Roller Shearer Inherent Frequency
     滚筒采煤机固有频率的计算机仿真
短句来源
     About fixation frequency, the yellow is lowest.
     注视频率上,黄色最低
短句来源
     At first the method for calculating the fundamental natural frequency of structure is researched.
     首先研究了结构的最低固有频率的计算方法。
短句来源
     A METHOD FOR CALCULATING THE FUNDAMENTAL NATURAL FREQUENCY OF STRUCTURES
     求工程结构最低固有频率的一种算法
短句来源
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  lowest natural frequency
The four lowest natural frequency parameters are reported as functions of four non-dimensional system parameters: the rise to chord length ratio, the span length to chord length ratio, the slenderness ratio and the shear parameter.
      
When circumjacent load makes the lowest natural frequency zero, critical load is obtained.
      
When circumjacent load makes the lowest natural frequency zero, critical load is obtained.
      
Previously used measures of sawblade dynamic stability, such as critical speed margin and lowest natural frequency, cannot adequately account for spatially dependent features such as guides, and can give, misleading stability comparisons.
      
Since transverse shear deformations are taken into account,the natural frequencies can be expressed as functions of two in-plane and four bending lamination parameters, with respect to which the lowest natural frequency of the plate is maximized.
      
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This paper describes an optimality criterion for structural dynamic opti- mization which is subject to structural weight constraint,with the structural frequen- cy as an objective function. A method of minimum weight design with the lowest frequen- cy as the constraint frequency is provided, and the iterative formulas and convergence criteria are found. Some interesting conclusions for antenna structure design are obtai- ned by studying the optimum antenna structures.

本文以结构频率作为目标函数,以结构重量作为约束,由极值条件推导出结构动力优化的最优准则;构造了一种以结构最低固有频率作为约束频率的结构最轻重量设计方法,并建立了相应的迭代公式和收敛准则。对天线结构进行了动力优化设计,得出一些对于天线结构设计有益的结论。

Yongle Bell is the largest bell in China. The experimental study On Yongle Bell has been carried out in two aspects: modal analysis and characteristics of bell sound. A method for modal analysis under transient-state is presented in this paper. The lowest natural frequency of Yongle Bell is 16 Hz. The sound of bell is harmonious. The frequencies of some partial tones, which are important in sensation, conform with the standard scale.

永乐大钟是我国最大的钟。对钟的测量包括振动的模态分析和钟声特性两方面。文中提出了一种在瞬态下模态分析的方法。永乐大钟的最低固有频率为16Hz,钟声谐和,其中一些主要分音的频率和标准音高有较好的符合。

This paper discusses by energy theorem the method of approximate computation for the lowest eigenfrequencies of rectangular plates, on which there are symmetrical concentrated masses, supported at corner points. In the case of several concentrated masses, by using the principle of superposition we may find the reduced coefficients of masses conveniently. Hence we can obtain the lowest eigenfrequencies of thin, plates. In the paper a good many numerical calculating examples ace illustrated.

本文用能量原理讨论在四角点被支承的矩形板上有对称的集中质量时计算最低固有频率的近似方法.当板上有几个集中质量的情形下,可应用迭加原理,很方便地求出质量换算系数,从而求出薄板的最低固有频率.文中列举了许多数值算例.

 
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