On the issue of choosing calculation methods in problems of monitoring local strength in on-board intelligent systems

Abstract

The results of the analysis of emergency statistics indicate that the problem of improving the safety of sea navigation remains very relevant. At the same time, one of the causes of serious damage to the hulls of ships is the effect of intense locally distributed loads, which often lead to the destruction of structures and even the death of ships. A promising way to solve this problem is the introduction of onboard intelligent systems into the practice of ship operation. To develop a local strength control unit, it is necessary to have methods for calculating structural elements beyond the elastic limit that provide the required accuracy with minimal computing power. A technique has been developed to take into account the effect of subsidence of frames adjacent to the loaded frame on the deformation of the locally loaded side overlap, and an assessment of the possibility of its application in the local strength control unit of the onboard intelligent system has been carried out. The presented technique is based on the realization of the hypothesis “about the instantaneous opening of plastic hinges”. The comparison with the calculation results using the finite element method implemented in the ANSYS software package is carried out. An acceptable for strength calculations of ship hull structures agreement of the results was noted, which indicates the possibility of practical use of the developed methodology, in particular when implementing the local strength control unit in on-board intelligent systems.