Finite Element Strength Analysis On12V280Diesel Engine Connecting Rod

Connecting rod in the operation of the internal combustion engine plays a very important role, it is connected to the piston and the crankshaft power transmission parts, the working environment to have high strength and reliability of connecting rod set by the connecting rod little head, shaft, big end bearing and bushing.After a lot of practice shows that the fatigue fracture is the main failure forms in the process of connecting rod in the work.Once connecting rod failure, will affect the normal work of the machine and cause big loss to the whole machine, so the structure and the calculation of fatigue analysis was carried out on the connecting rod is particularly necessary.When work, connecting rod by the compression of gas explosion pressure in cylinder and the compound role reciprocating inertial force of stretching, which makes connecting rod in a serious state of fatigue stress, the requirement of the design of the connecting rod is in connecting rod has enough stiffness, strength, fatigue strength under the premise of as much as possible to make it small volume, light quality, reasonable structure, and the maximum slow transition zone of stress concentration.This paper according to the drawings, application of three-dimensional entity modeling software Pro/E to establish linkage of entity modeling, simplify the modeling for the piston and the crankshaft, connecting rod in the Pro/E three-dimensional entity model into ANSYS software and model simplified geometric processing, etc.According to calculate the stress distribution of connecting rod load applied to a given material properties, and so on. in consideration of force of the connecting rod and movement process after the transfer of mass of the connecting rod for connecting rod of the static analysis, considering the working condition of connecting rod maximum pressure and the maximum tension conditions of various performance, finally carries on the finite element calculation and the result analysis.The finite element method as an effective analysis method, in the process of the design of the connecting rod has been widely used.12V280diesel engine connecting rod as the research object, based on the integrated application of CAD software and finite element analysis software ANSYS on the strength, deformation, modal, buckling and fatigue in finite element analysis, and according to the calculated results was carried out on the connecting rod structure improvements, provide reference for the type of the design of the connecting rod.