Marine environment load simulating method

Abstract

Provided is a marine environment load simulating method. The method mainly comprises the steps that according to a proportion of a jacket offshore platform model, a parameter of a practical marine environment load is converted into a parameter of a marine environment test load according to a similarity ratio criterion; a maximal environment load acting on the jacket offshore platform model is calculated; an extreme carrying capacity and an extreme displacement of the jacket offshore platform model are analyzed; the reliability of the jacket offshore platform model is evaluated; a proper servo electric cylinder is selected; and after that a marine environment load simulation system is installed, the obtained parameter of the marine environment test load is input to a computer control unit in the marine environment load simulation system, a load parameter and a PID regulation parameter are set, an instruction is emitted to the a server driver, and thus, the marine environment load is simulated. The method can be used to accurately simulate unsteady loads of different magnitudes and different frequencies in any angle of the horizontal direction, and can simulate environment loads in normal and extreme marine conditions effectively.

Description

technical field [0001] The invention relates to a method for simulating marine environment loads applied in the technical field of marine engineering. Background technique [0002] Model experiment is an important means of ocean engineering hydrodynamics research. Currently implemented offshore platforms must be modeled experimentally before and after design, simulating real wind, waves and other marine environmental conditions in marine engineering pools to predict their dynamic characteristics in real marine environments. [0003] Due to the influence of scale effect and other factors, it is difficult to accurately simulate wind and wave loads. The existing methods for simulating wind and wave loads mainly include the following: Method 1: Make a relatively accurate model of the offshore platform according to the scale, and use a fan and a wave-making system to simulate the wind spectrum and wave parameters under the model size in the ocean engineering pool. The second me...

AI Technical Summary

Problems solved by technology

These two existing methods have the following defects: Although the first method can accurately simulate the marine environmental conditions, it is limited by the current wind and wave generation technology, and the wind load and wave current load on the model are different from the theoretical values. There are still some differences. In addition, this method mainly studies the stability of marine structures, and the scale of the model is small, so it is not conducive to the study of structural performance; in the second method, because the model is generally subjected to wave force in the experiment , the wind load and flow load on the model cannot be measured and precisely controlled separately in the experiment

Images