Technical Transactions. Iss. 2

Technical Transactions. Iss. 2

Type: Collection of magazine numbers
Release date

Collection items (16)


Measurements of the angular and linear displacements of steered wheel

Wach, Krzysztof
Article
2018
This paper concerns the use of a prototype measuring instrument for conducting measurements of the linear and angular displacements of a steered wheel in relation to the car body. The theoretical principles of the measurement are presented, as are the notation method and a solution to the system of equations of the geometric constraints of the instrument’s mechanism. In the research section, the manner in which the measurements were conducted is discussed and sample results are described. A preliminary analysis of the results is performed in the summary section.

Nonlinear static analysis of air cushion in SolidWorks Simulation 2016

Kwiatkowski, Dominik, Lisowski, Edward
Article
2018
The paper presents the results of research for load lifting process for a single pneumatic cushion. The load lifting process has been simulated in SolidWorks Simulation using the model of Mooney-Rivlin for hyperelastic material. Research was conducted based on a simplified 3D model and drawn up a mathematical model of pneumatic cushions determining of non-linear static characteristics for the lifting height depending on the weight of the load and supply pressure. The results compare with the results of laboratory tests conducted for the platform equipped with four air cushions.

Interaction between hydraulic conditions and structures – fluid structure interaction problem solving. A case study of a hydraulic structure

Twaróg, Bernard
Article
2018
Contemporary analytical and computational techniques enable the researcher to define interaction between varying flow rates, varying volumes of filling water and the deformation and stresses occurring in the structural components of a hydraulic structure. This study aims to describe and create visualisations, under selected operating conditions, of displacements, deformations and stresses of a hydraulic structure resulting from loads generated by hydraulic conditions in standard components of the structure. A sample analysis was carried out for the Niedów earthen dam on the Witka River that failed in 2010 due to a disastrous inflow. The scope of this analysis covers the components of the spillway section: the spillway monolith, the dissipation basin slab and the flip bucket. The results of analytical work and visualisations are shown using the Flow3D software program.

An ant colony optimisation algorithm for the triple matching problem

Schiff, Krzysztof
Article
2018
In this article, ant colony optimisation algorithms for the triple matching problem are described. This is the first elaborated ant algorithm for this problem. The problem is modeled by means of a 3-dimensional array. The ant algorithm was compared with the Apx3Dmatchnig-F algorithm and tested for different values of ant algorithm parameters. The results of these tests were presented and discussed.

Load restraint with allsafe products. Part two: choosing a load securing system – a systematic analysis

Starkowski, Dariusz
Article
2018
This is the second part of an article concerning allsafe products (first is available in TT 1/2018, pp. 71–86) – it focuses on the planning role in the supply chain and the mechanisms that need to be taken into account during the process of the road transportation. Furthermore, the paper presents the results of an investigation that relates to the proper functioning of the supply chain in the distribution of 12,000 [kg] of strawberries. A weighted average method was used in reference to an analysis of load securing based on the products of three producers with the aim of indicating the safest and most modern way to secure the load in a semi-trailer. Rules of proper load placement and restraint inside the semi-trailer are also addressed, together with a loading plan associated with the analysis of the technical parameters of a semi-trailer and load securing systems.

Reliability component differentiation in building structures made of timber

Gwóźdź, Marian
Article
2018
The design of timber structures according to the current generation of Eurocodes results in new requirements being set for the authors of architectural and building designs with respect to the reliability management of such structures. The reliability problems should be formulated in the building permit design in an unequivocal manner, obliging the authors of the detailed design, as well as the contractors to deliver structures, which have all the operational parameters fully conforming to the expectations of the investor. Substantive and formal basics in this regard are formulated in the Eurocodes: PN-EN 1990, PN-EN 1991, PN-EN 1995 as well as in the related European codes. The reliability management problems of contemporary timber structures are related to the cubature buildings of different life spans, including buildings subjected to the climate loads characterised by several hundred year-long return periods..

Chemistry of 2-aryl-1-cyano-1-nitroethenes. Part II. Chemical transformations

Woliński, Przemysław, Kącka-Zych, Agnieszka
Article
2018
This work is a continuation of our study on the chemistry of 2-aryl-1-cyano-1-nitroethenes. In this paper, we describe the reactivity of 2-aryl-1-cyano-1-nitroethenes as a key component in [2+3] and [2+4] cycloaddition reactions, and in other transformations.

Chemistry of 2-aryl-1-cyano-1-nitroethenes. Part I. Synthesis and physical properties

Woliński, Przemysław, Jasiński, Radomir
Article
2018
In this paper, we present the methodology of preparation of 2-aryl-1-cyano-1-nitroethenes and the synthesis of their main precursor – nitroacetonitrile. We have also gathered the physical properties of all compounds of this group known in the literature.

Planning-related factors of the quality of the residential environment in the modelling of the functional spatial structure of Cracow

Ziobro, Anna
Article
2018
Models of functional spatial structures, thanks to information aggregation, facilitated the decision-making process in terms of the development of cities. Considering the quality of the residential environment in the planning-related approach, in the scale of the entire city, the Author investigates which elements should be presented in the analysed model. To this end, the Author undertakes an attempt at defining planningrelated factors of the quality of the residential environment and at assigning relevant indicators to them. These reflections focus on the example of Cracow.

The issue of the linearity of the waterfront based on the redevelopment of Lyon’s river banks

Zieliński, Rafał
Article
2018
The article discusses the issue of the redevelopment of Lyon’s waterfront areas and long-term development strategy following the process of redevelopment. Owing to the large scope of the operations in question and a radically different approach to the problem of the revitalisation of the areas where the city and water meet, it is possible to conduct comparative analyses by pointing out specific factors, which determine the success of the enterprise. That is why it is reasonable to consider the latest example of redevelopment, which is that of Confluence, a post-industrial district of Lyon. The degree of activation of this peninsula can be related to various factors, which create the linearity of the waterfront.