Analysis of Dynamic Characteristic According to the Gravity Direction of the Boundary Condition for Aircraft External Store

2020 ◽  
Vol 30 (5) ◽  
pp. 464-472
Author(s):  
Jihwan Park ◽  
Hoein Jeong ◽  
Yukyoung Lee ◽  
Sungyu Ahn
Keyword(s):  
Boundary Condition ◽  
Dynamic Characteristic ◽  
Gravity Direction

Study of Dynamic Characteristic of Friendship Avenue Bridge

2011 ◽  
Vol 311-313 ◽  
pp. 1305-1308
Author(s):  
Wei He ◽  
Rong He ◽  
Sheng Tai Yan
Keyword(s):  
Boundary Condition ◽  
Finite Element ◽  
Dynamic Analysis ◽  
Dynamic Characteristic ◽  
Dynamic Characteristics ◽  
Steel Tube ◽  
Wind Resistance ◽  
Finite Element Software ◽  
Long Span ◽  
New Type

Friendship Avenue bridge was a concrete-filled steel tube arch bridge (CFSTAB). As a new type of bridge, CFSTAB was widely constructed and rapid developed in China. Because of its merits, CFSTAB was constructed much more in China. With the span increasing rapidly, and the bridge gradually becoming thin, the long span CFSTAB should be paid more attention for its performance of aseismic, wind resistance and vehicle-bridge vibration.This article described the basic method of dynamic analysis for CFSTAB. And the Friendship Avenue CFSTAB was taken as an example, such as the choice of element types, conducted boundary condition and applying load were described in process of modeling FEM for it, and of which the dynamic characteristics was analyzed by finite element software ANSYS.

One-Dimensional Fin-Tip Boundary Condition Correction II

2001 ◽  
Vol 22 (5) ◽  
pp. 35-40 ◽  
Author(s):  
D. C. Look Jr ◽  
Arvind Krishnan
Keyword(s):  
Boundary Condition ◽  
One Dimensional

Analysis of magnetic force and dynamic characteristic for non-contact permanent magnet linear drive device

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1337-1345
Author(s):  
Chuan Zhao ◽  
Feng Sun ◽  
Junjie Jin ◽  
Mingwei Bo ◽  
Fangchao Xu ◽  
...  
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Dynamic Characteristic ◽  
Driving Force ◽  
Magnetic Circuit ◽  
Response Speed ◽  
Computation Method ◽  
Element Analysis ◽  
Element Simulation ◽  
The Relationship

This paper proposes a computation method using the equivalent magnetic circuit to analyze the driving force for the non-contact permanent magnet linear drive system. In this device, the magnetic driving force is related to the rotation angle of driving wheels. The relationship is verified by finite element analysis and measuring experiments. The result of finite element simulation is in good agreement with the model established by the equivalent magnetic circuit. Then experiments of displacement control are carried out to test the dynamic characteristic of this system. The controller of the system adopts the combination control of displacement and angle. The results indicate that the system has good performance in steady-state error and response speed, while the maximum overshoot needs to be reduced.

Sturm-Liouville Problem for Stationary Differential Operator with Nonlocal Two-Point Boundary Conditions

2006 ◽  
Vol 11 (1) ◽  
pp. 47-78 ◽  
Author(s):  
S. Pečiulytė ◽  
A. Štikonas
Keyword(s):  
Boundary Condition ◽  
Differential Operator ◽  
Boundary Conditions ◽  
Nonlocal Boundary Condition ◽  
Nonlocal Boundary ◽  
Liouville Problem ◽  
Complex Case ◽  
Qualitative Behavior ◽  
Point Boundary ◽  
Sturm Liouville

The Sturm-Liouville problem with various types of two-point boundary conditions is considered in this paper. In the first part of the paper, we investigate the Sturm-Liouville problem in three cases of nonlocal two-point boundary conditions. We prove general properties of the eigenfunctions and eigenvalues for such a problem in the complex case. In the second part, we investigate the case of real eigenvalues. It is analyzed how the spectrum of these problems depends on the boundary condition parameters. Qualitative behavior of all eigenvalues subject to the nonlocal boundary condition parameters is described.

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