Dynamic Stability of Thin-Walled Members

2001 ◽  
pp. 829-834
Author(s):  
Quanfeng Wang ◽  
Yi Luo
Keyword(s):  
Dynamic Stability ◽  
Thin Walled

Dynamic Stability Analysis of Mountain Hollow Thin-Walled High Pier under Impact Load

2015 ◽  
Vol 727-728 ◽  
pp. 553-558
Author(s):  
Hong Tao Yang ◽  
Rui Li ◽  
Zhi Qiang Chen ◽  
Zhang Yue
Keyword(s):  
Stability Analysis ◽  
Dynamic Stability ◽  
Impact Load ◽  
Horizontal Displacement ◽  
Practical Significance ◽  
Mountain Area ◽  
Load Amplitude ◽  
Response Characteristics ◽  
Thin Walled ◽  
High Pier

Hollow thin-walled high pier is a common form of high pier in mountainarea, so it is of practical significance to the dynamic stability analysis ofhollow thin-walled high pier in mountain area. This paper is taking themountainous area of a hollow thin-walled high pier as the background, and theestablishment of the fiber model with Midas for dynamic elastic-plastic timehistory analysis. The results show that: the hollow thin-walled high pier underthe impact load, load amplitude is lower than the critical load,and the dynamic response characteristics of thestructure of the value parameter i.e. horizontal displacement at pier top increaseslinearly with the load amplitude. When the load amplitude is larger than thecritical load, the horizontal displacement of pier top increases with theincrease of load amplitude nonlinearly. Power under dynamic load instabilitycritical load is about 80% under static load.

scholarly journals TECHNOLOGICAL FIXTURES FOR MACHINING LARGE-SIZED THIN-WALLED SHELLS OF COMPLEX PROFILE

2021 ◽  
pp. 28-41
Author(s):  
Svitlana Oliinyk ◽  
Lydmila Kalafatova
Keyword(s):  
Dynamic Stability ◽  
Frequency Spectrum ◽  
Dynamic Characteristics ◽  
Technological System ◽  
Complex Profile ◽  
Study Results ◽  
Thin Walled ◽  
Grinding System

The paper analyzes the structure of technological fixtures for the positioning and fixing of large-sized thin-walled pyroceram shells as a factor affecting the dynamic characteristics of the grinding system. The solution to the problem of ensuring the dynamic stability of the «mandrel-workpiece» subsystem is necessary to increase the efficiency of shell machining in present conditions. Studying the vibrations frequency spectrum of the technological system during grinding has made it possible to determine their sources. The magnitude and frequency of vibrations depend on the mandrel structure - the clamping fixture. The study results are the requirements for a new mandrel structure, considering the dynamic stability of the technological system.

Dynamic instability of ring-stiffened conical thin-walled rocket fairing in supersonic gas stream

2015 ◽  
Vol 230 (1) ◽  
pp. 55-68 ◽  
Author(s):  
Marina V Chernobryvko ◽  
Konstantin V Avramov ◽  
Valentina N Romanenko ◽  
Tatiana J Batutina ◽  
Ulan S Suleimenov
Keyword(s):  
Dynamic Stability ◽  
Dynamic Instability ◽  
Free Vibrations ◽  
Dynamical Model ◽  
Spatial Mode ◽  
Conical Shells ◽  
Piston Theory ◽  
Structure Dynamic ◽  
Thin Walled

The assumed-modes method is applied to obtain the dynamical model of the ring-stiffened conical shells in a supersonic gas stream. The pressure acting on the shell is described by the piston theory. The displacements of the rings are functions of the shell displacements. The kinetic and the potential energies of the structure are obtained as the functions of the shell displacements. It is suggested the approach to calculate the shell spatial mode, when the shell dynamic stability is lost. The free vibrations of the structures with different numbers of the rings are analyzed. The loss of the structure dynamic stability is investigated.

Sign in / Sign up

Export Citation Format

Share Document