Two-force rod buckling CAE simulation automatic modeling method
A modeling method and technology of two force rods, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., can solve problems such as error-prone, time-consuming and labor-intensive, and achieve the effect of improving work efficiency
Active Publication Date: 2020-12-18
CHINA FIRST AUTOMOBILE
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[0004] The present invention provides a two-force bar buckling CAE simulation automatic modeling method, the modeling method is based on the TCL script language, by solidifying all two-force bar node Set The method of collecting names and standardizing output template files realizes automatic modeling of two-force bar buckling and eccentric buckling CAE analysis, which greatly improves work efficiency and solves the problem that the existing manual modeling needs to complete at least 7 actions to form a two-force bar Buckling and eccentric buckling calculation files, time-consuming, labor-intensive, and error-prone
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[0039] Take a connecting rod as an example.
[0040] Step 1. Refer to figure 1 , manually prepare the connecting rod (two connecting rod) grid and attribute model;
[0041] Step 2. Refer to figure 2 , establish three node Set sets, each set contains only one node, and the names of the node sets are: nodeset_load1, nodeset_spc2, nodeset_systemz3;
[0042] Step 3. The program automatically recognizes the node set named nodeset_spc2 in the model, the nodes contained in this set are the origin of the local coordinate system, the nodes contained in the nodeset_load1 node set are the X axis of the local coordinate system, and nodeset_systemz3 nodes are used The nodes contained in the set are the Z axis of the local coordinate system;
[0043] Step 4. The program automatically recognizes the node set named nodeset_load1 in the model, and applies a load of 100000N in the negative direction along the X axis of the local coordinate system to the nodes contained in this set6
[0044...
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The invention belongs to the technical field of automobiles, and particularly relates to a two-force rod buckling CAE simulation automation modeling method. According to the invention, a TCL scriptinglanguage is adopted, two end points of a two-force rod piece and a Z-direction node SET set name of a local coordinate system are solidified, a template file is output in a standardized mode, the node name is recognized through a program, the local coordinate system is established at a designated node, an axial load is applied at the designated node, constraints are applied at the designated node, 1.5 mm forced displacement is applied to a specified node in the Z direction of a local coordinate system, and a buckling and post-buckling analysis standard output template is called, so that automatic generation of two calculation files of buckling and eccentric buckling of the two-force rod piece is realized, and the working efficiency is greatly improved. The problems that in existing manualmodeling, at least seven actions need to be completed, a two-force rod piece buckling and eccentric buckling calculation file can be formed, time and labor are wasted, and errors are prone to occurring are solved.
Description
technical field [0001] The invention belongs to the technical field of automobiles, in particular to an automatic modeling method for CAE simulation of two-force bar buckling. Background technique [0002] The chassis stabilizer link, shock absorber fork, control arm, etc. are in the form of two-force rods. While satisfying the strength and durability performance, the stability of the compression bar must also be satisfied, that is, the buckling load of the two-force rods should be greater than the actual work. The maximum load borne. However, when a two-force bar buckles, it is necessary to establish a local coordinate system according to the specified rules, apply a load along the specified direction, and apply constraints with different degrees of freedom to the two end points. When calculating buckling analysis, eccentric buckling must also be calculated, which is time-consuming and laborious. , and error-prone. [0003] The traditional modeling process of two-force ba...
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IPC IPC(8): G06F30/20G06F30/17G06F30/15G06F119/14
CPCG06F30/20G06F30/17G06F30/15G06F2119/14
Inventor 王涛曹正林韩超武小一孟夏蕾
Owner CHINA FIRST AUTOMOBILE