Optimization Study On Ballast System For 7500 Tons Revolving Derrick Barge

As the rapid development of offshore oil, large-scale marine engineering and port construction, floating crane is increasingly becoming an indispensable tool for ocean engineering. However, with the increasing size of floating cranes, their working stability has become the focus of our attention, while a fast and accurate ballast system will be a key factor in the stability adjustment.7500 tons floating crane of Zhenhua Port Machinery has been chosen as an object of study. Selecting two kinds of typical operating conditions, fixed lifting and rotary lifting, the laws of optimization of ballast tanks can be explored with the help of the traditional multi-program comparative analysis by evaluating the total ballast capacity and five parameters.On the basis of analyzing the former data, and connecting the relevant optimization theory, numerical analysis method for optimal design of ballast tanks has been proposed which then is applied to re-optimizing the floating crane. This method is verified reasonable and feasible by simulating the typical operating conditions with NAPA. Therefore, it can be regarded as a useful method for designers at the initial design stage. Moreover, the principle of optimization has been further developed and summarized by analyzing the mathematical modeling.Finally, the original piping layout of ballast system has been analyzed and some suggestion for improvement comes to consideration. A complete automation of ballast control system has been briefly described. Furthermore, some simple ideas for subsystem design have been put forward.