Dissertation > Excellent graduate degree dissertation topics show

Numerical Research on Dynamic Buckling of the Imperfect Stiffened Plate Under Impacted Load

Author: ZhangJinLing
Tutor: MaJun
School: Dalian University of Technology
Course: Design and manufacture of ships and marine structures
Keywords: Stiffened Plate ANSYS/LS-DYNA Nonlinear Dynamic Buckling Fluid-SolidImpact Loading
CLC: U661.4
Type: Master's thesis
Year: 2013
Downloads: 33
Quote: 0
Read: Download Dissertation

Abstract


The stiffened plate effectively ensure the reliability and durability of the structure, and it can significantly reduce the structural weight to save structural materials. Due to its high efficiency and economical efficiency, the stiffened plate has been widely applied in the engineering field of shipbuilding, aerospace, bridges, buildings, etc. On the other hand, the stiffener’s introduction will bring the discontinuity and inhomogeneity of the structure, coupled with some uncertain initial structural defects(such as the initial deflection, depression, holes, crack, etc) which can be produced in the process of construction and lifecycle. So all of these imperfection make the behavior analysis of stiffened plates very complex.At present, buckling analysis of the ship structure are generally based on the assumption of a static load. However, in reality, the majority of the load of the ship’s structure are dynamic. As we know, static buckling only depends on the magnitude of the force, while the dynamic buckling depends not only on the magnitude of the force, but also with the duration, the change of the frequency of the force and the structural factors such as the initial defects. Because of the introduction of the time parameter makes the problem more complicated, and the related literature is also relatively rare. So further study of stiffened plate structure’s dynamic response and the impact of the dynamic buckling problem with initial defects is very necessary.In accordance with B-R(Budiansky-Roth) standards, this paper uses the nonlinear dynamic analysis software ANSYS/LS-DYNA to study dynamic buckling characteristics of the imperfect stiffened plate which contains initial defects(initial deflection, partial holes, cracks). For this purpose, the influence of initial geometric deflection, dynamic load duration, impact load form, stiffener size and angle of inclination are discussed.This paper introduces the direction of the structural dynamic stability. And then research actuality of dynamic buckling has been concluded from two aspects-periodic load and impact load. The paper also discussed the classification of the structural buckling problem and the characteristics of the dynamic buckling. And next the criterion of the dynamic buckling has been evaluated.The results of the paper show that all of these are important factors to affect the stiffened plate dynamic characteristics, but the degree of influence are not the same. The load carrying capacity of imperfect stiffened plate will be enhanced if the initial geometric deflection and the partial pore radius are decreased, and it is also important to select the appropriate stiffened plate’s size and form to improve the carrying capacity of the imperfect stiffened plate.

Related Dissertations

  1. Satellite Attitude Determination Based on Gyro and Star Sensor,V448.2
  2. Analysis and Study of Abutment Stability in Concrete High Arch Dam by Three-Dimensional Nonlinear Finite Element Method,TV642.4
  3. Infrared Imaging Target Simulation Resistance Array Control System Development,TJ765.4
  4. Study on Nonlinear Variable Structure Guidance Law,TJ765
  5. Passivity-Based Control and Its Application to the Electromagnetic Levitation System,TP13
  6. Research on Servo Control System of Gyro-Stabilized Platform,TJ765
  7. Traveling Wave Solutions for Two Classes of Nonlinear Wave Equations,O175.29
  8. Active Power Filter and Its Application in Distribution Network,TN713.8
  9. Research on Adaptive Control of Recovery of UUV with Near Wall Constraint,TP273
  10. Study of Data Reduction Technique Based on Manifold Learning,TP311.13
  11. Integrable Discretizations to a Class of Soliton Equations,O175.2
  12. Identification and Robustness Analysis of Nonlinear Hybrid Dynamical System Concerning Glycerol Transport Mechanism,TQ223.162
  13. Frobenius nonlinear evolution equations integrable solutions and the expansion of integrable systems,O175.5
  14. The Coupling Model for Electric and Magnetic Fields in Nonlinear Left-handed Materials,O441.6
  15. The Research and Application of Modified Algorithms About Fuzzy Predictive Functional Control,TP273
  16. Study on the Broaching Performance of Nickel-base Superalloy Based on Finite Element Method,TG132.32
  17. Control Scheme of Switched Reluctance Generator Used in Wind Power System,TM352
  18. Time Series Nonlinear Analysis and Its Application,S11
  19. Study on Non-linear Vibration of Honeycomb Sandwich Plate with Simplify Supported,O322
  20. Nonlinear Dynamics of Honeycomb Sandwich Plate with Completed Clamped Supported,O322
  21. Analysis and Simulation of Model in Microbial Continuous Fermentation with Time-Delay,O175

CLC: > Transportation > Waterway transport > Marine Engineering > Ship Principle > Ship structural mechanics
© 2012 www.DissertationTopic.Net  Mobile