Evaluation of safety parameters of the motor grader during maneuvering in the street and road network

Introduction. The article is devoted to improving the safety of operation of motor graders in urban conditions. The paper considers analytical methods for evaluating the influence of structural, geometric and kinematic characteristics of the motor grader on the safety of maneuvering in urban conditions for u-turns and turns at the intersections of the road network.

Problem Statement. In the course of the study, it is necessary to establish safe values of kinematic and geometric parameters for maneuvering of motor graders with articulated frames in urban conditions.

Theoretical Part. The numerical estimates were made based on the technical characteristics of three types of articulated frame graders. We consider possible options for moving the grader out of the street or roadway when making a "right" or "left" turn at a road intersection to avoid the situation of moving the grader out of the street or roadway. The calculation scheme for determining the parameters of the motor grader's turn is constructed. The calculation formulas for the external and internal overall turning radii of the grader and the overall traffic corridor are obtained. This allows you to determine the minimum width of the roadway for safe maneuvering of the motor grader. The value of the required safe minimum turning radius of the motor grader for a given width of the roadway is determined. All calculation formulas are obtained for the general case when the trajectories of the rear and front wheels do not coincide. It is shown that when turning the motor grader, the most dangerous is the radius of the front dimensions, determined by the extreme points of the front bulldozer blade. The radius of the rear dimensions in this case can be ignored, because it is of negligible importance. If you make a u-turn at an intersection, you can take the grader blade out of the roadway. The maximum radius is determined by the size of the blade that goes beyond the width of the grader.

Conclusion. The obtained solutions can be used to determine safe maneuvering modes for motor graders in urban conditions.

1. Portnova A.A. Obosnovanie kriteriya effektivnosti manevrennosti avtogreydera s sharnirno sochlenennoy ramoy [Justification of the maneuverability efficiency criterion for a motor grader with an articulated frame]. Vestnik SibADI. 2014;4(38):34–38. (In Russ.)

2. Kasyanov V.E. et al. Issledovanie ekspluatatsionnoy nadezhnosti avtomobiley pri zamene parametra sdviga raspredeleniya resursa detaley zakona Veybulla [Study of the operational reliability of cars when replacing the parameter of the shift of the resource distribution of parts of the Weibull law]. Kachestvo i zhizn'. 2018;3:65–69. (In Russ.)

3. Kasyanov V.E. et al. Vliyanie general'nykh sovokupnostey konechnogo ob’ema na ekspluatatsionnuyu nadezhnost' avtomobiley pri edinichnom i seriynom proizvodstvakh [Influence of general aggregates of the final volume on the operational reliability of vehicles in single and serial production]. Kachestvo i zhizn'. 2018;3:69–73. (In Russ.)

4. Kasyanov V.E. et al. Preimushchestva primeneniya general'noy sovokupnosti konechnogo ob’ema vmesto vyborki dlya raspredeleniya Veybulla s tremya parametrami [Advantages of using a finite-volume population instead of a sample for a three-parameter Weibull distribution]. Engineering journal of Don. 2018;4:73–87. (In Russ.)

5. Kasyanov V.E., Deryushev V.V., Kosenko E.E., Kosenko V.V., Pshenichnaya A.Yu. Synthesis of methods and principles of ensuring the reliability of one-off and serial production machines. International Conference on Modern Trends in Manufacturing Technologies and Equipment (ICMTMTE 2018) electronic edition. Ser. "MATEC Web of Conferences" 2018. p. 02106.

6. Kasyanov V., Deryushev V., Shulkin L., Kosenko E., Kotesova A. Endurance tests of single machines production. International Conference on Modern Trends in Manufacturing Technologies and Equipment (ICMTMTE 2018) electronic edition. Ser. "MATEC Web of Conferences" 2018. p. 02107.

7. Demyanov Al.An., Demyanov Al. Al. Metod adaptivnogo sinteza friktsionnykh sistem [Method of adaptive synthesis of friction systems]. Mashinostroenie: entsiklopediya. Podvizhnoy sostav dorog. T. IV, 23; pod. red. B. A. Levina [Mechanical engineering: encyclopedia. Rolling stock of roads-Vol. IV, 23; ed. by B. A. Levin]. Moscow: Mashinostroenie, 2008. p. 72–74. (In Russ.)

8. Demyanov Al.An., Demyanov Al. Al. Adaptivnyy sintez friktsionno-mekhanicheskikh sistem [Adaptive synthesis of friction-mechanical systems]. Problemy i perspektivy razvitiya transportnogo kompleksa: trudy mezhdunar. nauch.-praktich. konf. [Problems and prospects of development of the transport complex: proceedings of the intern. scientific-practical conf.]. Rostov-on-Don, 2009. p. 44–45. (In Russ.)

9. Demyanov Al.An., Demyanov Al. Al. Strukturnyy analiz kak sposob povysheniya nadezhnosti mekhanicheskikh sistem [Structural analysis as a way to improve the reliability of mechanical systems]. Innovatsionnye tekhnologii v mashinostroenii i metallurgii: Mezhdunar. nauch.-prakt. konf. [Innovative technologies in mechanical engineering and metallurgy: Intern. scientific-practical conf.]. Rostov-on-Don, 2011. p. 304–305. (In Russ.)

10. Demyanov Al.An., Demyanov Al. Al. Nekotorye aspekty povysheniya ekonomicheskoy effektivnosti transportnoy infrastruktury [Some aspects of improving the economic efficiency of transport infrastructure]. Problemy mashinovedeniya. Tribologiya — mashinostroeniyu: materialy mezhdunar. nauch.-tekhnich. konf. [Problems of machine science. Tribology — engineering: proceedings of the international scientific and technical conf.]. Moscow, 2012. p. 212–216. (In Russ.)

11. Demyanov Al.An., Demyanov Al. Al. Sintez mekhanicheskikh sistem s podvizhnym osnovaniem [Synthesis of mechanical systems with a movable base]. Transport-2014: trudy mezhdunarodnoy nauch.-praktich. konf. Ch. 1. [Transport-2014: proceedings of the international scientific and practical conference. Part 1.]. Rostov-on-Don, 2014. p. 299–301. (In Russ.)