The article investigates the process of organization of the public passenger urban transport of the city of Rostov-on-don and regularities of the process of organization of the public passenger urban transport of the city of Rostov-on-don, the relationship of the factors influencing this process.

Keywords: preferential categories of passengers, passenger traffic, transport mobility, route network, public transport, regular passenger traffic, automated monitoring of passenger traffic

The selective method of calculation because of the profitability is successfully applied several centuries. However when calculating non-failure operation in case of fatigue failures (often sudden) when there is a considerable sedate communication of m=10-15 for the supermulti-cycle field of loading between durability (hardness, an endurance limit) and the operating tension, decrease in the minimum resource of details will make 10-100 and more times. It turns out because of an unaccounted main part of population. In our example of 104-50=9950 pieces of such details, i.e. their potential refusals. Therefore for this case a selective method – the intermediate stage of calculations.

Keywords: selection, fatigue resource, population of final volume, sedate communication

dependences of value distribution of hardness of an armature of the class A500C of different diameters are constructed. For determination of the minimum values the method of graphic transition from selective data to set is used. Calculation of the smallest values of hardness using the shift received in the analysis of set is carried out.

Keywords: selection, armature, population of final volume

The review of ways of welding of elements of bodies of cars is carried out. Merits and demerits of spot contact welding and a way of welding with use of the high-concentrated power sources are considered. The processes which are taking place in a zone of a welded seam when using laser welding are in details considered.

Keywords: metal welding, welded seam, laser welding

Researches of hardness of various steel grades for the purpose of determination of density of their distribution and distribution of extremes of selections are conducted. Results of the received researches are used for definition of a resource of details with use of a graphic method of transition from selection to set.

Keywords: selection, fatigue resource, population of final volume

In the article the results of studying the experience of factories of the construction industry concluded that the production of products manufactured are loss of original building materials. The proposed method of elimination of losses and method of calculation of the amount of these losses. An algorithm is developed to determine the causes of losses, as well as recommendations on elimination of waste construction materials. The research results are recommended for practical application in the factories of the construction industry

Keywords: method of saving material resources, factories, construction industry

Defined criteria for identification of defect parameters, on the basis of the analysis of the different modes of own fluctuations, with the use of finite element modal calculation console corpulent model of a rod with a single defect. Developed finite element model of a universal complex . Considered corpulent (3-d) model on the basis of 3D finite element Solid92. When solving the problem considered on 26 oscillation modes depending on the size of the defect and its location.

Keywords: Damaged, defective, swing, cantilever, frequency

The task of identification of defects in rods with different variants of fastening. In the basis of lies method parameter identification based on an analysis of the frequencies and parameters of natural modes of the structure. Built model of the rod design has defects fluctuations, using finite element of the complex 

Keywords: Defect, damage, rod, the oscillations of the cantilever rod