Research on the Numerical Calculation Method for Antiloosening Performance of Screwed Joints under Complex Working Conditions

Figure 1

Research and verification scheme for numerical calculation model of antiloosening performance under complex working conditions loading. (a) Dynamic simulation model. (b) Load calibration tests. (c) Tests under actual working conditions. (d) Clamped parts and fastener model. (e) Load data obtained by load calibration tests and tests under actual working conditions. (f) Load data obtained by dynamics simulation. (g) Preload measurement by the ultrasonic measuring system. (h) The mechanical model of SJSs under complex working loads. (i) The mechanical model of the bolt thread surface under complex working loads. (j) The microarea mechanical model at point B on the thread. (k) Loosening state of the SJS during the tests under actual working conditions.