Lubrication analysis method for stern bearing based on magnetic-hydraulic composite support coupling

A lubrication analysis device for a stern bearing based on magnetic-hydraulic composite support coupling, comprising:

• a magnetic-hydraulic analysis module, configured to start a timer, perform magnetic support characteristics analysis on a stern bearing to be analyzed to obtain a magnetic support analysis result, and perform lubrication and interface characteristics analysis on the stern bearing to obtain a lubrication support analysis result,
• a structural deformation analysis module, configured to perform structural deformation analysis on the stern bearing on the basis of the magnetic support analysis result and the lubrication support analysis result, to obtain a structural deformation amount,
• an acquisition module, configured to correct a water film thickness in the lubrication support analysis result on the basis of the structural deformation amount, and return to and perform the step of performing lubrication and interface characteristics analysis on the stern bearing on the basis of a corrected water film thickness, to obtain a corresponding first water film pressure and second water film pressure before and after correcting the water film thickness,
• a first determination module, configured to determine, on the basis of the first water film pressure and the second water film pressure, whether a water film pressure of the stern bearing is converged,
• a second determination module, configured to solve for a load carrying capacity of the stern bearing on the basis of the magnetic support analysis result and the lubrication support analysis result in a case that the water film pressure of the stern bearing is converged,
• a calculation module, configured to calculate a bearing wear depth of the stern bearing on the basis of a contact force of a micro-convex body in the lubrication support analysis result in a case of balance between the load carrying capacity and an input load preset, and
• a processing module, configured to return to and perform at an interval of a second time preset, if the timer does not reach a first time preset, the step of performing magnetic support characteristics analysis on a stern bearing to be analyzed to obtain a magnetic support analysis result and performing lubrication and interface characteristics analysis on the stern bearing to obtain a lubrication support analysis result, and output a target result if the timer reaches the first time, the target result comprising:
• at least one of the magnetic support analysis result, the lubrication support analysis result, the structural deformation amount, the load carrying capacity of the stern bearing, and the bearing wear depth, wherein
• the magnetic-hydraulic analysis module is specifically configured to:
• calculate a first water film thickness of the stern bearing on the basis of a geometric clearance of the stern bearing and an inclination amount of a stern shaft,
• calculate the water film pressure of the stern bearing on the basis of the first water film thickness,
• calculate a contact force of a micro-convex body in the stern bearing on the basis of the first water film thickness and the water film pressure, and
• take at least one of the first water film thickness, the water film pressure and the contact force of the micro-convex body as the lubrication support analysis result;
• and
• the magnetic support analysis result comprises a magnetic attraction force of the stern bearing;
• and the structural deformation analysis module is specifically configured to:
• calculate a flexural deformation amount of the stern bearing on the basis of the water film pressure, the contact force of the micro-convex body and the magnetic attraction force,
• calculate an elastic deformation amount of a bearing shell of the stern bearing on the basis of the water film pressure and the contact force of the micro-convex body, and
• take at least one of the flexural deformation amount and the elastic deformation amount of the bearing shell as the structural deformation amount.