# Reducing Oscillations in Suspension of Mine Monorail Track
## 1 Introduction
We have developed a mathematical model for movement of rolling stock on a suspended monorail and experimentally tested its adequacy. Tests were carried out on a special stand using special force registration sensors. As a result, actual values of dynamic loads on monorail were determined, which must be reduced to improve the efficiency of monorail transport. To eliminate this problem, additional research and the development of special monorail suspension devices are required. In works [9; 10], a comparison of results of numerical calculations with measurements at the test stand is presented, and results of numerical simulations in relation to the criterial states that could not be checked at the test stand as well as the analysis of overloads that affect the crew during the emergency braking are discussed. In addition, results of investigations are also described--tests of steel arch and rock bolt support resistance to static and dynamic loading induced by suspended monorail. Investigations [11; 12] are dedicated to substantiation of performance indicators of mine suspended monorail locomotives. Moreover, the authors consider dynamics of the traction device of a mine suspended monorail. The problems of creating mine suspended monorail roads with electric locomotives are studied in articles [13; 14]. The use of battery-powered suspended monorails in underground hard coal mines is indicated to improve working conditions. Despite the significant progress in development, batteries of mine suspended locomotives have a significant mass, and therefore increase the load on the monorail. This is especially true for batteries for coal mines, which have an explosion-proof shell. Results of dynamic analysis of the motion process of the driven monorail cart are provided in the article [15]. Based on the method of rigid-flexible connection, a design scheme for the interaction of rolling stock with a monorail is proposed. As a result, equations are obtained that describe patterns of movement of a monorail vehicle along a monorail. Calculation and analysis of suspended monorail vehicle are conducted in the work [16]. In this paper, the calculation of the suspension-type vehicle gauge under different running conditions was carried out in detail with the help of the standards. The article [17; 18] proposes a new method for dynamic simulation of the movement of a suspended monorail road, taking into account the action of traction. The established refined monorail-track coupling dynamic analysis model comprehensively considers the influence of nonlinear characteristics such as shear and torsional deformation of the track beam and noise problem. The calculation accuracy of the model in this paper is high, which greatly improves the application range of the calculation model. Studies [19; 20] are devoted to determining the resonance of a transport monorail system based on modal analysis and the dynamics of rigid-elastic links. The authors have established the oscillation frequencies that are formed during the movement of overhead monorail. Numerical solution of equations of oscillations of the mounted overhead monorail is obtained in the article [21]. The authors studied the effect of vehicle speed, pier height, caterpillar irregularity and vehicle load on ride comfort. The oscillation frequencies of the rolling stock of hinged monorail are determined in [20]. This work recommends the value of the lateral fundamental frequency limit for different spans of the straddle-type monorail tour transit system. In [22; 23; 24], dynamic characteristics of monorail vehicle with a single-axle bogie under conditions of movement along curved track were studied. The influence of the radius of the curve, the speed of movement and the rigidity of the driving wheels on the dynamic response to the monorail are determined. Despite the large amount of work carried out, the aforementioned studies do not fully solve the issues related to the formation of dynamic loads during the operation of suspended monozil roads.