Defining of bolt tightening using indirect method

Abstract

This paper dedicated to diagnostics of threaded joint. In case of big diameter of bolts or big number of ones required to find a method, which allows to check tightening degree of bolt (and nut) indirectly - i.e. not tightening using wrench or similar tool. Method in the paper shows efforts to prove that tightening effect obtainable dynamical property change in the threaded joint.