Finite element analysis for engine crankshaft torsional stiffness. (8th November 2019)

• Record Type: Journal Article
• Authors: Fan, Rang-Lin; Zhang, Chu-Yuan; Yin, Fang; Feng, Cheng-Cheng; Ma, Zhen-Dong; Gong, Hua-Bing
• Is Part Of: International journal of simulation and process modelling. Volume 14:Number 4(2019)
• Page Start: 389
• Page End: 396
• Publication Date: 2019-11-08
• Subjects: engine -- crankshaft -- torsional vibration -- torsional stiffness -- rigid-rotation -- finite element analysis -- finite element model -- lumped parameter model -- crankshaft torsional absorber -- modal analysis; Management -- Computer simulation -- Periodicals; Mathematical models -- Periodicals; Operations research -- Periodicals; Simulation methods -- Periodicals; 003.05
• Languages: English
• ISSNs: 1740-2123

Abstract

Accurate crankshaft torsional stiffness is important to build the lumped parameter model (LPM) for crankshaft torsional vibration analysis. For the crankshaft system of a four-cylinder in-line gasoline engine, a procedure to build the finite element model (FEM) is presented. And the applicability of two ways to set the equivalent mass or equivalent moment of inertia for piston-rod in FEM is declared. When building a lumped parameter model, the concept of rigid-rotation of the crank pin central section around the central line of the crankshaft is proposed, and a method to obtain the torsional angle of the central section is declared. What is more, three post-processing methods are presented to obtain the torsional stiffness coefficients. According to three load cases of no-load, half load and full load, the tests are carried out. The simulation results of FEM and LPM, and the test results have good agreement with each other.