Efficient Numerical Analysis for Dynamic Stability of Pipes Conveying Fluids

1989 ◽  
Vol 111 (3) ◽  
pp. 300-303 ◽  
Author(s):  
X. Q. Dang ◽  
W. M. Liu ◽  
T. S. Zheng
Keyword(s):  
Stability Analysis ◽  
Numerical Analysis ◽  
Dynamic Stability ◽  
Pulsatile Flow ◽  
Instability Region ◽  
Numerical Results ◽  
Numerical Analyses ◽  
One Dimensional ◽  
Search Approach

Based on the Floquet-Liapunov theory, this paper proposes an efficient one-dimensional search approach for stability analysis of pipes conveying pulsatile flow. The instability boundaries of a clamped-clamped pipe analyzed in this paper. The numerical results are satisfactory compared with existing results. Moreover, an instability region which failed to appear in ordinary numerical analyses is detected by our computations.

Numerical Analysis of Dynamic Stability of Elastic Truss Structures

1998 ◽  
Vol 13 (2) ◽  
pp. 75-81 ◽  
Author(s):  
Qi-Lin Zhang ◽  
Udo Peil
Keyword(s):  
Stability Analysis ◽  
Numerical Analysis ◽  
Dynamic Stability ◽  
Time Domain ◽  
Truss Structures ◽  
Equilibrium Equations ◽  
Numerical Examples ◽  
Motion Trajectories ◽  
Dynamic Excitations ◽  
Energy Increment

In this paper the concept of energy increment map is presented for stability judgement of elastic truss structures under arbitrary dynamic excitations. The modified member theory is adopted to establish the equilibrium equations of the structures. The motion trajectories of structures are numerically solved in time domain and the corresponding stability states are studied according to the energy increment map. Numerical examples show that the method of this paper can lead to satisfactory results in dynamic stability analysis of elastic truss structures.

Aerodynamic and stability analysis of personal vehicle in tandem-wing configuration

2016 ◽  
Vol 231 (11) ◽  
pp. 2146-2162 ◽  
Author(s):  
Tomasz Goetzendorf-Grabowski ◽  
Marcin Figat
Keyword(s):  
Stability Analysis ◽  
Dynamic Stability ◽  
Transport System ◽  
General Concept ◽  
Air Transport ◽  
Numerical Analyses ◽  
Transport Systems ◽  
Aerodynamic Design ◽  
Advantages And Disadvantages ◽  
University Of Technology

The paper presents a concept of tandem-wing configuration aircraft that was a Warsaw University of Technology proposal for the personal air transport system. The project was developed at Warsaw University of Technology, within the PPLANE project (FP7 – Personal Plane: Assessment and Validation of Pioneering Concepts for Personal Air Transport Systems). First, analysis of the general concept, advantages and disadvantages of tandem-wing configuration, and possible application as a personal air transport system vehicle are presented. Next, aerodynamic design is analyzed and dynamic stability is tested. All numerical analyses were made by use of the well-tested professional software for aerodynamic (MGAERO) and stability (SDSA) analyses.

Numerical analysis of dynamic stability of a reentry capsule at transonic speeds

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 646-653 ◽  
Author(s):  
Susumu Teramoto ◽  
Kouju Hiraki ◽  
Kozo Fujii
Keyword(s):  
Numerical Analysis ◽  
Dynamic Stability
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