Reliability Analysis of Diesel Engine Connecting Rod Threaded Connection Based on ANSYS

Abstract

Connecting rod bolt is the key component of the diesel engine crank connecting rod mechanism, and the phenomenon of stress concentration at the thread easily occurs in the working process of the crank connecting rod, due to the characteristics of the threaded connection. In order to improve the quality of the threaded connection of the diesel engine connecting rod, the connecting rod’s big end threaded connection structure is numerically simulated based on ANSYS finite element analysis software through the combination of theoretical analysis and numerical simulation. The stress distribution of different pitches, threaded connection length and bolt preload are analyzed, and the effects of different factors on the strength of threaded connection structure are obtained. The research results have important engineering application value for improving the reliability of the threaded connection and ensuring the safe operation of the diesel engine connecting rod mechanism.