Vol. 325 No. 2 (2014): Математика, физика и механика
Directions in developing safety theory of working process for a load-lifting cars set of a pipe-laying column
A large-scale program of designing and constructing transnational pipeline systems is implemented in modern Russia because of its unstable political relations with neighboring states. The main problem when laying pipeline in a trench is ensuring cargo stability of a set of pipe-laying column cars. There are some reasons of loosing cargo stability by a pipe layer crane: 1. inexperienced drivers. They react to partial loss of cargo stability and unload excessively the car, overloading the next pipe-layer crane; 2. roughness of a microrelief. The conclusion can be drawn on designing a control unit for a pipe-laying column to solve the following problems: 1. prevention of emergencies in pipe-laying column operation; 2. simplification of a pipe-layer crane driver work; 3. reduction of pipeline self-oscillations; 4. equal load of all pipe layer cranes of a pipe-laying column. The main aim of the study is to increase safety of a pipe-laying column operation; to prevent emergency. The methods used in the study are based on the analysis and synthesis of the results received in the research; theoretical researches are based on mathematical analysis, methods of imitating modeling; pilot studies are based on use of the experiment planning theory and the methods of statistical data processing. The results: Based on the example of a pipe-laying column the authors have studied the features of a load-lifting cars set operation to ensure safety of the works; have proposed the theoretical concept based on compensation of dynamic impacts on load-lifting equipment arising at operation; have designed the cars set control unit, providing cargo stability of a pipe-laying column. The paper introduces the perspective model of the pipe layer crane with the cargo moment stabilization device.
Keywords:
pipe-laying column, set of cars, pipe-layer crane, control system, stability moment, settlement scheme, uniform coordinates


