Crankshaft bending fatigue experiment system

The utility model discloses a crankshaft bending fatigue experiment system. The system is mainly composed of a harmonic vibration table body, a vibration exciter, a frequency changer, a programmable logic controller, a sensor group, a strain magnifying apparatus, and a computer. The utility model greatly reduces the manpower burden, provides convenience for experiment operation of experiment persons, reduces the artificial participating sections which are easy to lead to the operational errors, and makes the complicated algorithm with high accuracy applied, and the utility model obviously raises the accuracy of the crankshaft fatigue experiment.