scholarly journals Dynamic Load Modelling within Combined Transport Trains during Transportation on a Railway Ferry

2020 ◽  
Vol 10 (16) ◽  
pp. 5710
Author(s):  
Alyona Lovska ◽  
Oleksij Fomin ◽  
Václav Píštěk ◽  
Pavel Kučera
Keyword(s):  
Traffic Safety ◽  
Dynamic Load ◽  
Computer Modelling ◽  
Load Bearing ◽  
International Transport ◽  
Typical Scheme ◽  
Normative Documentation ◽  
Safe Transport ◽  
The Stability ◽  
Bearing Structure

The development of foreign economic activity of the Eurasian states led to the introduction of rail and ferry transportation. It is important to note that the current normative documentation does not fully cover the issues of transporting combined trains by sea. This can lead to a violation of the traffic safety of both the railway ferry and the transport of containers as part of combined trains by sea. In this connection, we investigated the dynamic loading of a container as part of a combined train when transported by a railway ferry. To ensure the stability of the container relative to the frame, we suggested an improvement of the load-bearing structure of a flat wagon. Additionally, we suggested the use of a viscous linkage between containers with the aim of reducing their dynamic load. To justify the suggested solutions, we carried out a mathematical modelling of the container dynamic load. The calculation was performed in MathCad. Due to the fact that the container has its own degree of freedom when transported by sea, the accelerations were separately determined for the supporting structure of the flat wagon and for the container. We found that the total amount of acceleration that acted on the container was 3.57 m/s2 (0.36 g) and on the load-bearing structure of the wagon was 2.47 m/s2 (0.25 g) which were, respectively, 38% and 23% less than the acceleration values in the typical scheme of their interaction. To determine the fields of acceleration distribution relative to the load-bearing structure of a flat wagon with containers, we carried out computer modelling of their dynamic load. The maximum percentage of discrepancy between the accelerations obtained by mathematical and computer modelling was 17.7%. The study will contribute to the creation of recommendations for the safe transport of combined trains by sea, as well as to increasing the efficiency of combined transport through international transport corridors.

scholarly journals Improvement of the bearing structure of the wagon-platform of the articulated type to ensure the reliability of the fixing on the deck of the railway ferry

2019 ◽  
Vol 254 ◽  
pp. 02035 ◽  
Author(s):  
Alyona Lovskaya ◽  
Juraj Gerlici ◽  
Oleksij Fomin ◽  
Kateryna Kravchenko ◽  
Pavlo Prokopenko ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Load ◽  
Longitudinal Axis ◽  
The Finite Element Method ◽  
Software Environment ◽  
International Transport ◽  
Angular Displacements ◽  
Bearing Structure

In the article the results of studies of loading of the bearing structure of a wagon-platform of an articulated type, created on the basis of the existing construction, during transportation on the railway ferry by sea are given. In order to ensure the reliability of the fixing of the bearing structure of the wagon-platform of the articulated type relative to the deck of the railway ferry, it is proposed to equip it with knots for fixing the chain ties. To study the dynamic loading of a wagon-platform of an articulated type during transportation on a railway ferry by sea, constructed a mathematical model of oscillations with angular displacements relative to the longitudinal axis of the vessel (loll/heel). The maximal values of accelerations, as components of dynamic load, acting on the bearing structure of a wagon-platform are determined. The obtained acceleration values are taken into account when calculating the strength of the bearing structure using the finite element method implemented in the CosmosWorks software environment. It is established that the maximum equivalent tension do not exceed permissible values. The carried out researches will promote increase of efficiency of combined transportations in the direction of the international transport corridors.

Analysis on Mechanical Properties of the Integral Jacking-Up of an Ancient Building

2013 ◽  
Vol 405-408 ◽  
pp. 900-904
Author(s):  
Tie Cheng Wang ◽  
Yu Hang He ◽  
Hai Long Zhao
Keyword(s):  
Mechanical Properties ◽  
Design Code ◽  
Load Bearing ◽  
The Stability ◽  
Bearing Structure

The underpinning plate is the main load-bearing structure in the integral jacking-up process of ancient building. The deformation and mechanical properties of the underpinning plate have impact on the stability and the safety of the whole integral jacking-up process. The deformation and mechanical properties of the underpinning plate in the loading stage and after the partial unloading stage are analyzed with ANSYS in the integral jacking-up process of a certain ancient building. It is shown that the deflection of the prestressed underpinning beam satisfies the requirement of the design code in the loading stage and after the partial unloading stage, the concrete at the bottom of the underpinning edge beam will not crack in the loading stage and the concrete at the bottom of the underpinning edge beam will crack after the partial unloading stage.

scholarly journals INVESTIGATION OF THE DYNAMIC LOAD OF THE JOINT-PLATFORM OF THE JOINT TYPE FROM ROUND PIPES LOADED BY TANKER CONTAINERS

2021 ◽  
Vol 1 (37) ◽  
pp. 31-40
Author(s):  
O. Fomin
Keyword(s):  
Dynamic Load ◽  
Equations Of Motion ◽  
Longitudinal Force ◽  
Railway Transport ◽  
Load Bearing ◽  
Coupling Device ◽  
Mathcad Software ◽  
The Impact ◽  
Bearing Structure ◽  
Resistance Forces

The dynamic loading of the load-bearing structure of the articulated platform car made of round pipes loaded with tank containers was determined. The research was conducted by mathematical modeling. The solution of the equations of motion is carried out in the MathCad software package. It is established that under the influence of a longitudinal force of 2.5 MN on the front stops of the autocoupling, the acceleration on the first section of the platform car is 27.7 m/s² from the side of the force application, and on the second - 24.4 m/s2. To reduce the dynamic load of the load-bearing structure of the platform car, the possibility of using the concept of a harness device on it as an alternative to a typical self-coupling device is considered. The quenching of the kinetic energy of the impact is carried out due to the viscous resistance forces arising in the concept. The proposed implementation allows to reduce the dynamic load of the load-bearing structure of the platform car by 10% compared to the use of a standard self-coupling device. The conducted researches will promote creation of innovative designs of cars-platforms and increase of efficiency of use of railway transport.

scholarly journals Creating mathematical model of the bearing structure dynamic load of the flat wagon from round pipes in the main operational modes

2021 ◽  
Vol 55 ◽  
pp. 875-881
Author(s):  
Oleksij Fomin ◽  
Juraj Gerlici ◽  
Alyona Lovska ◽  
Mykola Gorbunov ◽  
Kateryna Kravchenko ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Dynamic Load ◽  
Structure Dynamic ◽  
Operational Modes ◽  
Bearing Structure

scholarly journals Reliability as a Key Driver for a Sustainable Design of Adaptive Load-Bearing Structures

2022 ◽  
Vol 14 (2) ◽  
pp. 895
Author(s):  
Dshamil Efinger ◽  
Andreas Ostertag ◽  
Martin Dazer ◽  
David Borschewski ◽  
Stefan Albrecht ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Construction Materials ◽  
Internal Stresses ◽  
Elastic Model ◽  
Load Spectrum ◽  
Operating Life ◽  
Load Bearing ◽  
Linear Elastic ◽  
High Rise ◽  
Bearing Structure

The consumption of construction materials and the pollution caused by their production can be reduced by the use of reliable adaptive load-bearing structures. Adaptive load-bearing structures are able to adapt to different load cases by specifically manipulating internal stresses using actuators installed in the structure. One main aspect of quality is reliability. A verification of reliability, and thus the safety of conventional structures, was a design issue. When it comes to adaptive load-bearing structures, the material savings reduce the stiffness of the structure, whereby integrated actuators with sensors and a control take over the stiffening. This article explains why the conventional design process is not sufficient for adaptive load-bearing structures and proposes a method for demonstrating improved reliability and environmental sustainability. For this purpose, an exemplary adaptive load-bearing structure is introduced. A linear elastic model, simulating tension in the elements of the adaptive load-bearing structure, supports the analysis. By means of a representative local load-spectrum, the operating life is estimated based on Woehler curves given by the Eurocode for the critical notches. Environmental sustainability is increased by including reliability and sustainability in design. For an exemplary high-rise adaptive load-bearing structure, this increase is more than 50%.

scholarly journals ANALYSIS OF DYNAMIC LOADING OF IMPROVED CONSTRUCTION OF A TANK CONTAINER UNDER OPERATIONAL LOAD MODES

2019 ◽  
Vol 2 ◽  
pp. 61-70
Author(s):  
Oleksij Fomin ◽  
Alyona Lovska ◽  
Oleksandr Gorobchenko ◽  
Serhii Turpak ◽  
Iryna Kyrychenko ◽  
...  
Keyword(s):  
Dynamic Loading ◽  
Dynamic Load ◽  
Operating Conditions ◽  
Dynamic Loads ◽  
The Finite Element Method ◽  
Operational Load ◽  
International Transport ◽  
Improvement Measures ◽  
Cargo Transportation

An increase in the volume of bulk cargo transportation through international transport corridors necessitates the commissioning of tank containers. Intermodalization of a tank container predetermines its load in various operating conditions depending on the type of vehicle on which it is carried: aviation, sea, air or rail. The analysis of the operating conditions of tank containers, as well as the regulatory documents governing their workload, led to the conclusion that the most dynamic loads acting on the supporting structures during transportation by rail. Namely, during the maneuvering collision of a wagon-platform, on which there are tank containers. In this case, it is stipulated that for a loaded tank container, the dynamic load is assumed to be 4g, and for an empty (for the purpose of checking the reinforcement) – 5g. It is important to note that when the tank container is underfilled with bulk cargo and taking into account movements of fittings relative to fittings, the maximum value of dynamic load can reach significantly larger values. Therefore, in order to ensure the strength of tank containers, an improvement of their structures has been proposed by introducing elastic-viscous bonds into the fittings. To determine the dynamic loading of the tank container, taking into account the improvement measures, mathematical models have been compiled, taking into account the presence of elastic, viscous and elastic-viscous bonds between the fittings, stops and fittings. It is established that the elastic bond does not fully compensate for the dynamic loads acting on the tank container. The results of mathematical modeling of dynamic loading, taking into account the presence of viscous and elastic-viscous coupling in the fittings, made it possible to conclude that the maximum accelerations per tank container do not exceed the normalized values. The determination of the dynamic loading of the tank container is also carried out by computer simulation using the finite element method. The calculation takes place in the software package CosmosWorks. The maximum values of accelerations are obtained, as well as their distribution fields relative to the supporting structure of the tank container. The developed models are verified by the Fisher criterion. The research will contribute to the creation of tank containers with improved technical, operational, as well as environmental characteristics and an increase in the efficiency of the liquid cargo transportation process through international transport corridors.

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