| With the booming development of bridge construction, bridge construction often face with building brige piper in the deep-water. It makes present construction techonology of construction company of our country face with grim challenges. As a temporary construction structure, construction platform means critical importance to construction operation of deep-water piper in the construction process. During the construction process of the steel pipe platform, there are many forces act on it, and people are still not very familiar with the calculation principium and the style of which they act on the platform. Otherwise there are many random dynamic force act on the platform, so there is no doubt that we should calculate the dynamic response of the whole structure and the local position, estimate the failure mode damage condition, put forward the improvement measure and determine the economical design method.The element model and computer model of the structure is analysised, and the three-dimensional beam element is adopt to build the calculation model. The author give the reasonable calculation method of the wave force and analysis the influence of different mode of action of the wave force. Simplified method of calculating the wave force of the oblique pipe was given.In chapter 4, the random dynamic response analysis based on the wave force was made. The caculated dynamic response was considerd to the couple of structure and water in the action of wave force. The influence of the hydrodynamic dame and additional water mass on the random dynamic response was analyzed. The results show that the dynamic influence of the wave force should be considered during designing construction platform.In chapter 5, with the help of the ANSYS finite element programming, author stimulate many time historical curves of wave force. Time historical analysis based on deterministic wave force and random wave force was made. The calculation of random wave force and determinate wave force were compared.
|
PDF Full Text Request