Outline the use of FEM to explore body presets
Using software to solve the calculation, the calculation time and the comparison between the calculation result and the refinement model are shown in the following figure. The calculation time of the finite element model is simplified. Under the same conditions, the computer memory and the hard disk space are the same, and each working condition of the refined model is bent or twisted statically. The analysis and calculation time needs to be left and right, and the simplified model can perform the calculation of the two types of conditions. The detailed calculation of the model data or graphical display takes several minutes, and the corresponding work of the simplified model takes only a few seconds.
The same loading conditions and boundary conditions are used for the torsional conditions, the model's torsional stiffness is refined, the model is more refined, the model's height is higher than the bending condition, the maximum deflection of the refined model is one, and the simplified model is one. difference. From the above comparison, we can see the feasibility of establishing a simplified model. When establishing a simplified model of a car body, it must be noted that the following points must ensure the transfer path of the load, mainly reflected in the connection between the parts of the model, that is, the part of the structure that should be connected to each other must maintain the connection unchanged.
Otherwise, there will be a phenomenon in which the load transfer is interrupted, resulting in erroneous results. It should be noted that the structure of the front and rear wheel covers is complex, and the change in curvature is for the Ford-China Research and Development Fund. Large parts simulation. Experience shows that these structures are not feasible with straightforward music. The effect of section characteristics on body stiffness. Pay attention to the handling of master-slave degrees of freedom. The main section shape and the moment of inertia of the model built in this paper cannot be simplified as the drive shaft channel in the middle of the table floor. Changing the cross-sectional properties of each major section to study the flexibility of the cross-section joints cannot be ignored. The effect on the body stiffness.
According to the calculation results, the schematic diagram of the influence of the cross-section characteristics on the torsional stiffness and the influence on the bending stiffness are obtained respectively. When the cross-sectional shape of the structure is determined, reference can be made to the conditions shown in the figure to make corresponding adjustments to each section, in order to achieve the optimal design. . In order to reduce the mass, it is most effective to increase the stiffness by changing the moment of inertia of the structural sections that are sensitive to stiffness, ie large structural sections.
In this paper, we only discuss the methods of optimizing the structural parameters of equal-thickness section plate gradient stiffness plate springs. The structural diagram of the variable stiffness leaf spring The relationship between the load and the deformation of the leaf spring Gradient stiffness The spring increases gradually with the load, and its elastic properties are in turn linear, nonlinear and linear. That is to say, the results of the initial design are based on various analysis calculations, such as the sensitivity of the cross-section characteristics to the stiffness effect mentioned in the text, to improve the structure, and then perform the next round of calculation, analysis, and comparison until it is satisfied.
Sardine and Tuna Can Production Lines
tuna production line,Full-automatic tuna sardine food tin can production line,Sardine/Tuna Can Production Lines
Zhoushan Golden Pard Machinery Co., Ltd.  , https://www.fishprocessinglines.com