Method for determining the frictional force generated on a movable object in a guide on an inaccessible site

摘要

With this method it is possible to evaluate opposing friction forces occurring after a certain operating time on a mobile object in a guide.The method consists of measuring the variations in the speed of movement of the mobile object, of calculating the theoretical speed of movement without friction, of combining these two results and thereby deducing outside opposing forces through calculation of the acceleration of the mobile object.Particular application to the evaluation of additional friction forces acting on a mobile control cluster assembly in the core of a pressurized water nuclear reactor.