# 3, 2016

 

 

 

D.G. Menliyahmatov, M.S. Lyapustin, A.V. Lipenkov

 

EVALUATION OF THE EFFECTIVENESS OF THE SIMULATED ANNEALING ALGORITHM FOR FINDING
THE SOLUTION OF THE VEHICLE ROUTING PROBLEM FOR FREIGHT

 

Nizhny Novgorod State Technical University n.a. R.E. Alexeev

 

The article discusses the applicability of the  simulated annealing algorithm for finding the solution of the vehicle routing problem for freight.  It gives a detailed description of the simulated annealing algorithm and also it gives a  description of the Clarke & Wright's Savings Algorithm. It gives a description of the results of  the comparative analysis of these two algorithms for the different number and combinations of  points.

 

Keywords: freight, vehicle routing problem, simulated annealing algorithm, combinatorial optimization.

 

 

L.A. Cherepanov

 

METHOD OF THE INVESTIGATION OF THE MECHANISM

OF DEVELOPMENT OF A TRAFFIC ACCIDENT, ON A REGULATED INTERSECTION

 

Tolyatti State University

 

A practical example describes a method of discovering the mechanism of development of the accident.

 

Keywords: traffic accident, the mechanism of the accident.

 

 

A.N. Kovalyov

 

COORDINATE DEVICE OF WIND TUNNEL IN NNSTU n.a. R.E. ALEKSEEV

 

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

 

 

The report contains a description of peculiarities of construction and work of the coordinate device in the experimental facility "Wind tunnel" in NNSTU n.a. R.E. Alekseev.As an example of using the device, the results of measurement of air flow velocity in a boundary layer of a plate are shown.

 

Keywords: coordinate device, wind tunnel, boundary layer.

 

 

Y. I. Rabazov

 

THE FORMATION AND DEVELOPMENT OF DOMESTIC SHIPS

INTERNAL AND MIXED RIVER-SEA NAVIGATION

 

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

 

Produced analysis of the current state of river transport fleet of our country. Formulated a number of problematic issues, the solution of which is the creation of a modern, efficient and competitive vessels to meet all operating requirements.

 

Key words: mixed-navigation vessels, design features, and improved competitiveness.

 

 

A.G. Voevodin

 

THE ANALYSIS OF EFFICIENCY OF METHODS OF THE CENTRAL REGULATION OF WATER SYSTEMS OF HEATING

 

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

 

The comparative technical and economic analysis of efficiency of three methods of the central regulation of water systems of heating – qualitative, quantitative and periodic. As criteria of comparison the meanings of normative technological losses for a heating season (heat transfer, with outflow and on filling) heat-carrier are considered by transfer of a thermal energy on 2-pipes networks by thermal capacity of 1000 kWt and length 1000 m for Nizhni Novgorod climatic zone and operational expenses of electrical energy by network pumps (under condition of their job on the maximal efficiency). At qualitative regulation the constant submission of network water under the heating temperature diagram 95-70 0С is accepted, at quantitative - constancy of temperatures of direct and return water 95 and 30 0С accordingly at the variable charge of the heat-carrier, at periodic - constant submission of network water with periodic inclusion - deenergizing of torches of boiler (inclusion on maximal heat power with temperature of water, submitted in a network, 95 0С - at achievement of temperature of return water 30 0С and deenergizing at achievement of temperature of return water 70 0С).

 

Keywords: systems of water heating, methods of the central regulation (qualitative, quantitative and periodic), normative meanings of technological losses by transfer of a thermal energy on heat supply networks, consumption of electrical energy by network pumps, operational expenses, comparative technical and economic analysis.

 

 

O.A.Sergeyev1, V.G.Kiselev2, S.A.Sergeyeva1

 

OPTIMAL DESIGN OF BEAM STRUCTURES FOR STRESS AND

BANDS OF FEASIBLE NATURAL FREQUENCIES CONSTRAINTS

 

1 Nizhny Novgorod State Technical University n.a. R.E. Alekseev

2 Lobachevsky State University of Nizhny Novgorod

 

The multi-parametric optimization problem for minimal weight of beam structures for stress and bands of feasible natural frequency constraints is formulated. Both node coordinates and element cross-sectional areas, sectional dimensions are varied simultaneously. The analytic sensitivity analysis of simple natural frequencies is performed. The optimal design is attained by solving a sequence of quadratic programming problems. The proposed method is examined with medium complexity beam structures and is shown to be effective and reliable.

 

Keywords: optimization, analytical sensitivity analysis, linear elastic beam structures, non-multiple natural frequencies.

 

 

I.K. Kuzmichev, A.B. Kornev, V.I. Lyubimov

 

PURPOSEFUL ACTIVITY OF R. E. ALEKSEEV AS AN EXAMPLE FOR SHIPBUILDERS

 

Volga State University of Water Transport

 

The main stages of the activities of R.E. Alekseev and estimation of their influence on the development of modern schools of shipbuilding. The contribution to the creation of new high-speed vessels, naval architecture graduates of VSUWT is described.

 

Keywords: Alekseev, biography, activities.