Finite Element Analysis And Software Development Of Hydraulic Cylinder On The Arm Of Excavator

Hydraulic cylinder on the arm of excavator is a power actuator that can transmit the rotation between the bucket and the arm.The characteristics such as bad load and long working period make the mechanical equipment have higher requirements for its service life.The geometrical shape of the component is complex and there are multiple stress concentration sites.It is difficult to accurately calculate the stress of these parts by using traditional analytical methods,and therefore the fatigue life cannot be accurately calculated.In order to realize the goal of designing the hydraulic cylinder according to the expected life,it is of great significance to establish an accurate stress prediction model of the hydraulic cylinder on the arm of excavator in this paper.It aims to develop a stress analysis model and fatigue life analysis for hydraulic cylinder on the arm of excavator.The main tasks include:(1)Using the APDL parametric design language of ANSYS commercial finite element software to establish an accurate finite element model of hydraulic cylinder on the arm of excavator;(2)The model can be loaded according to the actual load spectrum.The stress spectrum of each part can be obtained through analysis,and the fatigue life distribution of each part of the hydraulic cylinder can be predicted based on the stress spectrum obtained by the above analysis.(3)Stress tests of hydraulic cylinder on the arm of excavator were performed.Compared the stress test results with the finite element analysis results,the correctness of the developed finite element model was verified;(4)Parametric fatigue life analysis software was developed.