Study on stability of double corsair's main stand
The structure safety is numerically studied on main support of the huge pirate ship by use of finite element method (FEM). In order to the elements meshed successfully, the equivalent treatment is used for the complex structure. The static, structure instability and model analyses are carried out. The static and stability safe coefficient are 6.12 and 19, respectively, which are more than the demand in national standard. The model analysis indicates that the swing frequency is 0.08 Hz, and can be kept off the natural frequency.
Dynamic Stability of the Stiffened Plates Subjected to Solid-fluid Impact
Dynamic stability of the stiffened plates subjected to solid-fluid impact is calculated with finite element method.That is helpful for the dynamic stability of the bulkheads in underwater explosion.Some factors are analyzed,including stiffened plates and the thickness of the stiffened plates,the magnitude and the shape of the initial imperfection,the impact pulse width,the pulse load,the edge conditions,the distributions of the stiffeners and the thickness of the plate.Some suggestions are presented according to these factors,which are helpful to the engineering design.
Stiffness of cover plate connections with slotted holes
Abstract This paper describes the prediction of stiffness of bolted cover plate connections with slots perpendicular to the acting force. The work is based on three sets of tests: experiments on connections with more bolt rows and different bolt forming technology performed at the CRIF laboratory in Liege, experiments with long slots completed at the Laboratory of Technical University Nottingham, and experiments with components carried out at the Czech Technical University in Prague. The work shows the application of the component method to the prediction of stiffness of the cover plate connections. The component bolt/plate in bearing is evaluated. Special attention is paid to the modelling of the bolt force distribution for different bolt tolerances.