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旋转梁     
相关语句
  rotating beam
     Finite Element Dynamic Equation and Its Element Matrices of a Rotating Beam
     旋转梁的有限元动力学方程及其单元矩阵
短句来源
     Dynamic Modeling and Feedback Control of Rotating Beam
     旋转梁的动力学建模及其反馈控制
短句来源
     RIGID-FLEXIBLE COUPLING VIBRATION OF A ROTATING BEAM SUBJECTED TO BASE EXCITATION
     支承运动情况下旋转梁的刚-柔耦合振动分析
短句来源
     Beam-Column Element for Vibration Analysis of Rotating Beam
     一种分析旋转梁振动的梁柱有限元
短句来源
     Computation of Natural Frequencies of a Rotating Beam
     旋转梁的固有频率计算
短句来源
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  rotating beams
     NATURAL VIBRATION ANALYSIS OF ROTATING BEAMS WITH HIGH-ORDER FINITE ELEMENTS
     用高阶有限元分析旋转梁的固有振动
短句来源
     THE DEVELOPMENT OF STUDY ON COMPOSITE THIN-WALLED ROTATING BEAMS
     复合材料薄壁旋转梁的研究进展
短句来源
  “旋转梁”译为未确定词的双语例句
     The problem of the coupling vibration of elastic beams in the revolution system is studied in the present paper.
     研究旋转梁结构的弹性耦合振动问题。
短句来源
     In symplectic system, coupling control equations of longitudinal and transverse vibrations, i.e. Hamiltonian duality equations, are described.
     在辛体系中描述旋转梁纵向和横向耦合振动控制方程,即哈密顿正则方程。
短句来源
     Among mechanical properties the fatigue limit in rotational beam tests has been determined.
     在机械特性中,利用旋转梁试验,确定了疲劳强度。
     Numerical examples of a rotating Timoshenko beam are studied to analysis the frequency and tip deflection of the proposed methods,and to investigate the effect of axial inertial force and transverse distributed force and the‘softer effects’resulting form the coupling effect,with different angular velocities and high-length ratios.
     对一平面旋转梁进行仿真计算,通过分析不同情况下的频率与端点变形位移,说明耦合作用的“软化”效果,以及轴向离心力、横向惯性力对模型的影响。
短句来源
     The dynamic equation and boundary condition of the rotating flexible beam carrying a concentrated mass at its free end ware derived.
     利用哈密顿原理建立了支承运动情况下变速旋转梁的弹性振动方程及边界条件 .
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  rotating beam
Fuzzy Logic Control of Parametrically Excited Rotating Beam Using Inverse Model
      
For the system of the centre rigid-body mounted on an external cantilever beam, the equilibrium solution of the steadily rotating beam is stable if the effect of its shearing stress (i.
      
In this case, the tension buckling of the equilibrium solution of the steadily rotating beam may occur.
      
In this paper, dynamic modeling and application of the MTA to a high-speed rotating beam are studied.
      
Equations of a rotating beam are obtained and the FEM and MTA are used for discretization.
      
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  rotating beams
For rotating beams the frequency generally decreases as the curvature increases, and the reduction from the straight beam frequency increases as the rotating speed increases.
      
Gyroscopic Effects Analysis in the Lagrangian Formulation of Rotating Beams
      
Identification of resonant frequencies of rotating beams with the use of PZT crystals
      
Thus, the displacement of the fixed beams due to the released residual stress leads to the rotation of the rotating beams.
      
The beam arrangement on SeaWinds instruments is a new design, with two conically rotating beams at fixed incidence angles.
      
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The work summarized in this paper aims at improving the accuracy of rotor blade dynamics analysis,and that of its internal force calculation in particular,by the finite element method.A family of nonuniform rotating beam conforming elements is developed.Also,it is proposed how the internal force of the blade can be calculated directly from the node displacement by means of the dynamic stiffness matrix of the finite element("dyna-mic stiffness method" for short).In illustration the natural frequencies,mode shapes...

The work summarized in this paper aims at improving the accuracy of rotor blade dynamics analysis,and that of its internal force calculation in particular,by the finite element method.A family of nonuniform rotating beam conforming elements is developed.Also,it is proposed how the internal force of the blade can be calculated directly from the node displacement by means of the dynamic stiffness matrix of the finite element("dyna-mic stiffness method" for short).In illustration the natural frequencies,mode shapes and bending moments of a blade flapwise bending vibration have been calculated.Numerical results are presented for a typical case.The blade has discontinuosly varying bending stiffness and mass distribution along the spanwise direction.The nonuniform rotating beam conforming elements with displacement functions based respectively on the 3rd,5th and 7th order polynomial and the "dynamic stiffness method" are used in the calculation.The results show that the work has attained the predetermi-nate goal.

提高用有限元法进行桨叶动力分析、特别是动内力计算的精度是本文工作的主要目的。本文建立了变剖面旋转梁协调单元族;提出利用单元动刚度矩阵直接由节点位移计算桨叶内力(简称为计算内力的“动刚度法”)。作为例子,用所导出的不同精度的有限单元和建议的内力计算方法计算了具有不连续结构特性的变剖面桨叶弯曲振动固有频率、振型和模态内力。计算结果表明,工作可以达到预期的目的。

The main purpose of the work described in this paper is to improve the accuracy of rotor blade dynamics analysis, especially, that of internal force calculation by the finite element method. A family of nonuniform rotating beam confoming elements is developed. The explicit expressions for the geometrical stiffness matrices of tha elements with displacement functions based respectively on the 3rd, 5th and 7th order polynomical are given. This paper also presents a method'called "dynamic stiffness method" by which...

The main purpose of the work described in this paper is to improve the accuracy of rotor blade dynamics analysis, especially, that of internal force calculation by the finite element method. A family of nonuniform rotating beam confoming elements is developed. The explicit expressions for the geometrical stiffness matrices of tha elements with displacement functions based respectively on the 3rd, 5th and 7th order polynomical are given. This paper also presents a method'called "dynamic stiffness method" by which the internal force can be calculated directly from the node displacement. As illustrative examples, the natural frequencies, mode shapes and bending moments of blade flapwise bending vibration are calculated. The results show that the purpose of the work can be achieved.

提高用有限无法进行桨叶动力分析、特别是内力计算的精度是本文工作的主要目的。本文建立了变剖面旋转梁协调单元族,给出了位移函数为三次、五次、七次幂多项式时变剖面旋转梁协调元的几何刚度矩阵显表达式。文中还提出了直接用节点位移计算内力的“动刚度法”。作为例子,用所给出的有限元和方法计算了桨叶弯曲振动固有频率、振型及模态弯矩。计算结果表明,工作可以达到预期的目的。

Explicit expressions lor the shape functions, the related stiffness, geometrical stiffness and mass matrices of partially orlhgonal hierarclial finite elements of arbitrary high-order for beams are all presented in the closed form in this paper. These expressions are used to evaluate the natural frequencies and the corresponding internal forces of a uniform cantilever beam and a rotating beam with continuously varying segment by segment properties, respectively. The results show that, the present technique is...

Explicit expressions lor the shape functions, the related stiffness, geometrical stiffness and mass matrices of partially orlhgonal hierarclial finite elements of arbitrary high-order for beams are all presented in the closed form in this paper. These expressions are used to evaluate the natural frequencies and the corresponding internal forces of a uniform cantilever beam and a rotating beam with continuously varying segment by segment properties, respectively. The results show that, the present technique is rather effective as concerns the computation efficiency, accuracy of results, programming, feasibility of use, etc.

本文给出任意阶次高精度有限元形状函数及其有关的刚度、几何刚度和质量矩阵的显表达式,并用以计算均匀或分段连续变化的旋转梁的固有振动特性。结果表明,本方法在计算效率、结果精度、程序编制及使用方便性等方面均有相当的优点。

 
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