| Abstract [eng] |
The object of the final project – fire doors used in marine vehicles. The main objective – investigate how the temperature deformations of fire doors used in marine vehicles depend on the peculiarities of the door construction and the materials used in it. The final project consists of four chapters: In Chapter 1, a review of the scientific literature is performed, which examines fire structures (modeling and experimental research). Chapter 2 examines and presents the basic requirements for „B“ class fire doors. Chapter 3 provides a simplified door FEM model: removed door elements such as lock-case, handle, door hinges (lock and hinges parts in contact with the frame and door-frame, replaced by rigid ties); the counter-frame, the door-frame and the panel wall surfaces are considered as one body; there is no loss of thermal conductivity between the contacting surfaces and the contacting bodies are kept rigidly connected. The average temperature and average temperature deformations obtained at special points in the door model differ from the temperatures and deformations determined in the laboratory tests by 7% and 11% respectively. In Chapter 4, numerical studies were performed with new door constructions that vary the thickness of the door-leaf steel (from 0,6 mm to 2,0 mm), using different types of insulation materials („SuperWool“, „FireMaster“, „MaxWool“) and additional stiffness profiles inside the door-leaf (U, Z, L). It was found that increasing the thickness of door-leaf steel sheet on the hinge side and on the both sides increases the temperature and temperature deformations while increasing the thickness of the door-leaf on the opposite side of hinges decreases the temperature and temperature deformations. By choosing the right insulation material („FireMaster“ or „SuperWool“) it is possible to obtain a „B-30“ class fire door construction that meets the requirements of temperature and temperature deformations. The use of an additional stiffness profile in the door-leaf results in an increase in temperature and a decrease in temperature deformations at specific door points. |
