Calculations
Ansys & Creo Simulate
ANSYS for the mechanics of deformed solids allow you to solve a wide range of engineering problems in the field of strength and thermal calculations, as well as make design decisions faster and more efficiently.
With the help of ANSYS tools, our company not only performs its calculations, but also conducts research on many design options to find the best solution.
We perform calculations of static and dynamic strength, heat transfer and other phenomena in solids (Ansys Mechanical).
TechproektGroup LLC has an ANSYS software license, and carries out projects using the advantages of this software to create structures with a competitive advantage.
Strength calculations.
Calculation of voltage in the case of simultaneous action of many loads.
Calculation of loads in accordance with regulatory documentation (ND): in accordance with DSTU, Norms, or GOST.
As the rolling stock is subjected to the simultaneous action of different loads: vertical, longitudinal, lateral, in accordance with the ND, calculated cases are formed in which several types of loads are applied to the model.
After determining the stresses for each calculation case, a conclusion is made on compliance with the strength requirements.
If necessary, the design model is finalized and re-tested.
The strength of the body of the dump truck.
- During the development of new cars, the number of such steps for refinement and re-inspection can reach several dozen. This is also due to the fact that in addition to the requirements of strength, it is also necessary to meet the requirements of minimum weight, as it increases the load capacity and competitiveness of rolling stock and increases the profits of companies operating cars.
Strength calculations.
Calculation of deformations
Sun to the rolling stock requires checking the deformation of the structure, which should not exceed the normative values. The results of such calculations are also used when checking the passage of dimensions, as well as in the case of comparison with the deflection of the suspension springs to check the absence of resonance, etc.
Deformations of the long-base platform
-
Since the location of the load on the body of the car can reach dozens of options, this leads to the need for an appropriate number of calculations of deflection and selection of the most dangerous options for the location of goods.
Calculation of the stability of thin-walled structures.
During operation, the rolling stock is subject to significant compressive loads. Therefore, according to ND, the calculation of the structure for stability under the action of compressive forces in combination with forces acting in different directions.
The most dangerous warrants for load tests are identified;
Stability calculations are performed. Stability margin coefficients are determined and compared with ND requirements.
Completion of the structure and recalculation are performed if necessary.
Modal analysis.
Calculation of shapes and frequencies of natural oscillations of rolling stock.
To check the absence of resonance during the movement of rolling stock, according to the ND, it is necessary to perform a modal analysis.
To do this, ANSYS creates a model of a car with a load and determines the shape and frequency of oscillations of the body as an elastic body.
The frequency of oscillations on the springs of the body as a solid is also determined.
The first form of bending vibrations of the platform car.
-
The frequency of oscillations of the body as an elastic body with the oscillations of the body on the springs is not allowed.
-
Completion of the structure and recalculation are performed if necessary.
Nonlinear calculations of rubber-metal elastic elements.
When creating one of the projects (carts 18-4129) rubber-metal elastic elements were used. And since rubber has nonlinear elastic properties, there was a need to perform nonlinear calculations.
In the process of calculations, 3-d models of elastic elements were created, the properties of rubber and metal were set, loads and boundary conditions were added;
the calculation of strength and the calculation of deformations;
The calculations showed an excellent coincidence with the results of the experiment.
Axle box with rubber-metal elastic element
Stress in the rubber-metal elastic element
Nonlinear deformations of a rubber-metal elastic element
Thermal calculation.
Calculation of a metal-plastic window of a passenger car.
To perform the calculation, a window cross-section model is created, thermal insulation properties of materials, boundary conditions inside and outside the window are set.
The calculation process determines the temperature fields, temperature gradients, heat fluxes and thermal insulation properties of the window in general.
The results of the calculations clearly show the areas of construction that need to be improved and help the engineer to provide comfort to passengers and save energy.
Temperature in the window section
Cross section of a passenger car window and properties of materials
Temperature gradient in the cross section of the window
Heat flux density in the cross section of the window
Thermal calculation.
Calculation of thermal insulation properties of a passenger car window.
Thermal calculations have a huge range of applications. According to the results of calculations, passenger comfort is ensured, heating and air conditioning systems are designed, energy needs and harmful emissions (CO, CO2, CH, etc.) into the atmosphere are reduced.
To perform the calculation, a model of the cross section of the passenger car body is created, the thermal insulation properties of materials, boundary conditions inside and outside the car are set.
The calculation process determines the temperature fields, temperature gradients, heat fluxes and thermal insulation properties of the body as a whole.
The results of the calculations clearly show the areas of construction that require refinement and help the engineer to provide comfort to passengers and save energy for heating and air conditioning.
Cross section of the passenger car wall
Heat flow and temperature fields at the intersection of the wall of a passenger car
Calculations of kinematic schemes
The task of kinematic calculation is to choose the type of mechanism and determine the size of its links, at which the mechanism would ensure the movement of the executive body (slave) according to the law in accordance with the requirements of the technological process.
Kinematic parameters determine the dynamics of technological loads, pressures in kinematic pairs and stresses in the links of mechanisms.
Methods for determining the size of the links and calculating the elements of kinematic pairs for mechanisms of different types are different.
Power calculation is to determine the forces acting on individual parts of the moving mechanisms.
-1.png)
Kinematic scheme of the brake lever transmission of a 6-axle dump truck