scholarly journals NONDESTRUCTIVE METHOD TO DETERMINE MOISTURE AREA IN HISTORICAL BUILDING

2017 ◽  
Vol 7 (1) ◽  
pp. 68-71 ◽  
Author(s):  
Tomasz Rymarczyk ◽  
Przemysław Adamkiewicz
Keyword(s):  
Finite Element Method ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Nondestructive Method ◽  
Brick Wall ◽  
Building Structures ◽  
The Finite Element Method ◽  
Historical Building ◽  
One Step ◽  
Real Building

This paper presents a nondestructive method of brick wall dampness testing in real building structures. The proposed algorithm was used to determine the moisture of test brick walls on the specially models. The finite element method has been used to solve the forward problem. The algorithm is initialized by using one step methods and topological sensitivity analysis. There was constructed the forward model and solved the inverse for visualization of moisture inside objects.

scholarly journals Building structures thermal calculation

2021 ◽  
Vol 21 (3) ◽  
pp. 260-267
Author(s):  
A. V. Maistrenko
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Composite Materials ◽  
Wind Power ◽  
Power Plants ◽  
Temperature Fields ◽  
Thermal Calculation ◽  
Building Structures ◽  
The Finite Element Method ◽  
Wind Power Plants

Introduction. The thermal calculation of a volumetric structure using the finite element method is considered. According to the plans of the Ministry of Energy of the Russian Federation, a powerful wind energy industry will be created in the country in the coming years. In this regard, calculations in the production of building structures of wind power plants are currently becoming a challenge. The production of such fiberglass structures is a complex thermochemical process, including the polymerization of the binder under strictly specified thermal conditions. The work objective is to develop a method for three-dimensional finite element calculation of the non-stationary heating mode of a complexshaped composite structure.Materials and Methods. The determination of the temperature fields of a complex-shaped structure made of inhomogeneous materials causes using numerical methods and, first of all, the finite element method. The finite element modeling of the behavior of composite materials under molding is still incomplete. For its partial solution, the well-known heat conduction equation is adapted for a specific problem based on the first law of thermodynamics. New finite element models describing the thermal fields in the structure during its manufacture are proposed. The accuracy of modeling thermal processes is specified. Numerical simulation of heating is carried out.Results. The solution to the problem was performed in the multifunctional software complex ANSYS with the implementation of the calculation method in the parametric programming language APDL. The temperature fields of the blade elements of wind power plants at the stage of their manufacture were calculated, which made it possible to identify the characteristic features of the production process of these structures and to obtain recommendations for clarifying the process of their gluing.Discussion and Conclusions. The results obtained can be used in thermal calculations of elements of complex layered structures made of composite materials in wind power, mechanical engineering, aircraft, shipbuilding, instrumentation, etc.

scholarly journals Sensitivity analysis for a problem of optimal structure design

1994 ◽  
Vol 16 (1) ◽  
pp. 36-42
Author(s):  
Ngo Huong Nhu
Keyword(s):  
Finite Element Method ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Structure Design ◽  
Optimal Structure ◽  
Effective Algorithm ◽  
The Finite Element Method ◽  
Plane Frames ◽  
Sensitivity Vector

On the basis of theory of structure sensitivity analysis, the gradient – projection method and the finite element method, a detailed and effective algorithm of determination of the sensitivity-vector for the optimal structure design problem is proposed. Numerical results illustrating the program corresponding to this algorithm have been given for some plane frames.

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