Commercial vehicle body-in-white torsional rigidity measuring system and method

The invention relates to the technical field of commercial vehicles, in particular to a commercial vehicle body-in-white torsional rigidity measuring system and method. The positioning device is used for supporting and positioning the body-in-white of the commercial vehicle; the force applying device is used for applying load to the commercial vehicle body in white; the measuring device is used for measuring the force application magnitude and displacement of the force application device; the measurement method of the commercial vehicle body-in-white torsional rigidity measurement system comprises the following steps: the measurement device measures multiple groups of data of force application F and displacement D; the body-in-white torsional rigidity is obtained through a torsional rigidity calculation formula; the measuring system is light in mass, detachable and convenient to move, the measuring method realizes rapid and convenient measurement of the torsional rigidity of the commercial vehicle body in whi