CONTROL TECHNIQUE OF LOCAL AND GENERAL STABILITY OF THE LOADING CRANE’S TELESCOPIC BOOM

Abstract

Introduction . The paper examines the overall and local stability of a telescopic boom (TS). Materials and methods . The author uses methods for analytical research of oscillatory systems with a finite number of degrees and methods of the Deformable Solid Mechanics, such as Material Resistance. Moreover, the author applies Solid Edge Simulation as finite element analysis program based on FEA Femap analysis technology and the NX Nastran solver. Results . As a result, the author develops a methodology for monitoring the overall and local stability of the vehicle. The usage of the calculation for the overall stability of the vehicle allows to determine the load-height characteristics, parameters of the working equipment that ensure the steady state of the system, and also to track the overall steady state of the vehicle as a function of the vehicle characteristics. In addition, the usage of local stability calculation allows to track the maximum stress state of the vehicle, which is a criterion of local stability and provides the ability to monitor the stability of the most loaded shelves and walls. The proposed method for calculating the stress state takes into account the combined effect of external and local horizontal and vertical loads. Discussion and conclusions . The usage of methods of monitoring the overall and local stability of the vehicle allows to set automatically the most optimal characteristics of the working equipment, including the developed method in the crane safety system, and to increase the level of safe operation of load- lifting cranes equipped with vehicles.