This study predicts the new eigenvalues and eigenvectors of a modified crankshaft structure due to the changes in mass and stiffness properties. A sensitivity method was used and equations were derived with respect to the physical parameter to calcula...
This study predicts the new eigenvalues and eigenvectors of a modified crankshaft structure due to the changes in mass and stiffness properties. A sensitivity method was used and equations were derived with respect to the physical parameter to calculate the crankshaft sensitivity due to the structural modification. Firstly, modal analysis was performed and the results of natural frequency, mode shape and frequency response were compared with those obtained by experimental work. The comparison results showed a good agreement. Then, the position, direction of parameter changes and modified value were predicted for structural modification. Finally the predicted value is used to investigate the magnitude of vibration and we found that the effect of modification results considerably reduce the level of magnitude vibration.