Method for replacing mechanical shock simulation with static strength simulation

Abstract

The invention relates to a method for replacing mechanical shock simulation with static strength simulation. The method comprises the following steps: 500m / s < 2 > mechanical shock simulation: establishing an explicit analysis simulation model, carrying out grid division on geometric data, setting material attributes, setting mechanical shock simulation boundary conditions, solving and calculating, and counting results; 500m / s < 2 > static strength simulation: establishing an implicit analysis simulation model, setting a static strength simulation boundary condition, solving, calculating and counting a result; comparing simulation results; and 750m / s2 static strength simulation verification, solving calculation and result statistics are carried out. The invention provides a method for replacing mechanical shock simulation with static strength simulation, which simulates the static response of a structural member under an extreme load by reasonably setting simulation parameters and boundary conditions, thereby indirectly evaluating the mechanical shock resistance of the structural member. An implicit analysis method is used for static strength, and the method is short in solving calculation time, is not influenced by the minimum grid size, and can synchronously guarantee the solving speed and simulation precision.

Description

Technical Field

[0001] The invention belongs to the technical field of computer-aided engineering (CAE), and in particular relates to a method for replacing mechanical impact simulation with static strength simulation based on CAE. Background Art

[0002] According to the requirements of GB / T28046.3-2011, electrical and electronic equipment of road vehicles must meet the requirements of mechanical impact performance. In the simulation implementation process, mechanical impact requires the use of explicit analysis methods, which takes a long time to solve and calculate. In addition, the solution speed is additionally affected by the minimum mesh size of the model. The smaller the minimum mesh size, the longer the solution time. However, the increase in mesh size will not be able to reflect small features in the model, affecting the simulation accuracy. Therefore, in order to complete the simulation task within the specified time, a larger mesh size is usually selected, sacrificing the analysis accuracy. Summary of the invention

[0003] The purpose of the present invention is to provide a method for replacing mechanical impact simulation with static strength simulation, by reasonably setting simulation parameters and boundary conditions, simulating the static response of structural parts under extreme loads, so as to solve the problem of indirectly evaluating their ability to resist mechanical impact.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A method for replacing mechanical impact simulation with static strength simulation comprises the following steps:

[0006] Step A, 500m / s 2 Mechanical shock simulation;

[0007] Step A1: Establish an explicit analysis simulation model, mesh the geometric data, set material properties, and export;

[0008] Step A2, setting the mechanical shock simulation boundary conditions, fully constraining the product installation points, loading the entire model with a half-sine wave shock pulse load, and exporting the model to wait for calculation;

[0009] Step A3, solving the calculation;

[0010] Step A4, statistical results;

[0011] Step B, 500m / s 2 Static strength simulation;

[0012] Step B1, establishing an implicit analysis simulation model;

[0013] Step B2: Set the static strength simulation boundary conditions, fully constrain the product installation points, and load the entire model at 10m / s 2 The acceleration of the model is exported and waits for calculation;

[0014] Step B3, solving the calculation;

[0015] Step B4, statistical results;

[0016] Step C: Compare the simulation results, count the stress results of each part in step A and step B, and proportionally convert the static strength simulation of how much acceleration is 500m / s 2 The mechanical shock simulation results are comparable;

[0017] Step D, 750m / s 2 Static strength simulation verification;

[0018] Step D1. Open the model exported in step B2 and change the acceleration of the entire model to 750m / s 2 , X, Y, and Z directions need to be loaded separately, and the model needs to be exported and wait for calculation;

[0019] Step D2, solving the calculation;

[0020] Step D3, statistical results, read the file and count the maximum stress of each part.

[0021] Furthermore, step A1 is specifically as follows: using the finite element simulation pre-processing Hypermesh software Abaqus module to mesh the geometric data, set material properties, and export the inp format model for standby use.

[0022] Further, step A2 is specifically as follows: in the Hypermesh software, the product installation points are fully constrained, and the entire model is loaded with a half-sine wave shock pulse load with an acceleration of 500m / s 2 , duration 6ms, X, Y, Z directions need to be loaded separately, export inp model and wait for calculation.

[0023] Furthermore, steps A4 and B4 are specifically as follows: using Hyperview software, reading the odb file of the previous step, reading and counting the maximum stress of each part for standby.

[0024] Further, step B1 is specifically as follows: using the finite element simulation pre-processing Hypermesh software Abaqus module to open the inp format model exported in step B1, updating all mesh types, and ensuring that the model can be carefully analyzed for static strength.

[0025] Further, step B2 is as follows: in the Hypermesh software, all product installation points are fully constrained and the entire model is loaded at 10m / s 2 The acceleration in the X, Y, and Z directions needs to be loaded separately, and the inp model is exported and waits for calculation.

[0026] Further, step C is as follows: the equivalent static strength of different parts in different directions is different, so simulation verification in three directions is required, and here 750m / s is taken. 2 Serves as an equivalent load for static strength simulation.

[0027] Further, step D1 is specifically as follows: using the finite element simulation pre-processing software Hypermesh Abaqus block to open the inp format model exported in step B2, and changing the acceleration of the entire model to 750m / s 2 , X, Y, and Z directions need to be loaded separately, and the inp model needs to be exported and wait for calculation.

[0028] Furthermore, step D3 is specifically as follows: using Hyperview software, reading the odb file of the previous step, and reading and counting the maximum stress results of each part.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention provides a method for replacing mechanical impact simulation with static strength simulation. By reasonably setting simulation parameters and boundary conditions, the static response of a structural component under extreme loads is simulated, thereby indirectly evaluating its ability to resist mechanical impact. The static strength uses an implicit analysis method, which has a short solution calculation time and is not affected by the minimum grid size, and can simultaneously ensure the solution speed and simulation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 Schematic diagram of implicit analysis simulation model;

[0033] Figure 2 A flow chart of the steps of a method for replacing mechanical impact simulation with static strength simulation according to the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with embodiments:

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] The method of replacing mechanical impact simulation with static strength simulation in the present invention comprises the following steps:

[0038] Step 1: 500m / s 2 Mechanical shock simulation;

[0039] Step 101, establish an explicit analysis simulation model, use the finite element simulation pre-processing Hypermesh software Abaqus (Explicit) module to mesh the geometric data, set material properties, and export the inp format model for standby use.

[0040] Step 102: Set the mechanical impact simulation boundary conditions. In the Hypermesh software, fully constrain the product installation points and load the entire model with a half-sine wave impact pulse load with an acceleration of 500m / s. 2 , duration 6ms, X, Y, Z directions need to be loaded separately, export inp model and wait for calculation.

[0041] Step 103, solve the calculation, use Abaqus software to solve the inp model file exported in the previous step, and obtain the obd format result file.

[0042] Step 104, statistical results, using Hyperview software, read the odb file in the previous step, read and statistically calculate the maximum stress of each part for future use.

[0043] Step 2: 500m / s 2 Static strength simulation;

[0044] Step 201, establish an implicit analysis simulation model, use the finite element simulation pre-processing Hypermesh software Abaqus (Standard3D) module to open the inp format model exported in step 101, update all mesh types, ensure that the model can be carefully static strength analyzed, products such as Figure 1 shown.

[0045] Step 202: Set the static strength simulation boundary conditions. In the Hypermesh software, fully constrain the product installation points and load the entire model at 10 m / s. 2 The acceleration in the X, Y, and Z directions needs to be loaded separately, and the inp model is exported and waits for calculation.

[0046] Step 203, solve the calculation, use Abaqus software to solve the inp model file exported in the previous step, and obtain the obd format result file.

[0047] Step 204, statistical results, using Hyperview software, read the odb file in the previous step, read and statistically calculate the maximum stress of each part for future use.

[0048] Step 3: Compare the simulation results. Count the stress results of each part in step 1 and step 2, and proportionally convert the static strength simulation of how much acceleration is 500m / s. 2 The mechanical impact simulation results are similar. The statistical results are shown in Table 1. The equivalent static strength of different parts in different directions is different, so simulation verification in three directions is required. Here, 750m / s is taken. 2 Serves as an equivalent load for static strength simulation.

[0049] Table 1

[0050]

[0051] Step 4: 750m / s 2 Static strength simulation verification;

[0052] Step 401: Use the finite element simulation pre-processing software Abaqus (Standard3D) module to open the inp format model exported in step 202, and change the acceleration of the entire model to 750m / s 2 , X, Y, and Z directions need to be loaded separately, and the inp model needs to be exported and wait for calculation.

[0053] Step 402, solve the calculation, use Abaqus software to solve the inp model file exported in the previous step, and obtain the obd format result file.

[0054] Step 403, statistical results, using Hyperview software, read the odb file in the previous step, read and count the maximum stress of each part as shown in Table 2. From the results, it can be seen that 750m / s 2 All static strength simulation results are greater than 500m / s 2 Mechanical shock simulation results.

[0055] Table 2

[0056]

[0057] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for replacing mechanical impact simulation with static strength simulation, characterized in that: The following steps are involved: Step A, 500m / s 2 Mechanical shock simulation; Step A1: Establish an explicit analysis simulation model, mesh the geometric data, set material properties, and export; Step A2, setting the mechanical shock simulation boundary conditions, fully constraining the product installation points, loading the entire model with a half-sine wave shock pulse load, and exporting the model to wait for calculation; Step A3, solving the calculation; Step A4, statistical results; Step B, 500m / s 2 Static strength simulation; Step B1, establishing an implicit analysis simulation model; Step B2: Set the static strength simulation boundary conditions, fully constrain the product installation points, and load the entire model at 10m / s 2 The acceleration of the model is exported and waits for calculation; Step B3, solving the calculation; Step B4, statistical results; Step C: Compare the simulation results, count the stress results of each part in step A and step B, and proportionally convert the static strength simulation of how much acceleration is 500m / s 2 The mechanical shock simulation results are comparable; Step D, 750m / s 2 Static strength simulation verification; Step D1. Open the model exported in step B2 and change the acceleration of the entire model to 750m / s 2 , X, Y, and Z directions need to be loaded separately, and the model needs to be exported and wait for calculation; Step D2, solving the calculation; Step D3, statistical results, read the file and count the maximum stress of each part.

2. The method of replacing mechanical impact simulation with static strength simulation according to claim 1, characterized in that: Step A1 is specifically as follows: using the finite element simulation pre-processing software Abaqus module Hypermesh to mesh the geometric data, set material properties, and export the inp format model for later use.

3. The method of replacing mechanical impact simulation with static strength simulation according to claim 1, characterized in that: Step A2, specifically: in the Hypermesh software, fully constrain the product installation points, and load the entire model with a half-sine wave shock pulse load with an acceleration of 500m / s 2 , duration 6ms, X, Y, Z3 directions need to be loaded separately, export inp model and wait for calculation.

4. The method of replacing mechanical impact simulation with static strength simulation according to claim 1, characterized in that: Steps A4 and B4 are specifically as follows: using Hyperview software, read the odb file of the previous step, read and count the maximum stress of each part for future use.

5. The method of replacing mechanical impact simulation with static strength simulation according to claim 1, characterized in that: Step B1, specifically: use the finite element simulation pre-processing Hypermesh software Abaqus module to open the inp format model exported in step B1, update all mesh types, and ensure that the model can be carefully analyzed for static strength.

6. The method of replacing mechanical impact simulation with static strength simulation according to claim 1, characterized in that: Step B2, specifically: in the Hypermesh software, fully constrain the product installation points and load the entire model at 10m / s 2 The acceleration in the X, Y, and Z directions needs to be loaded separately, and the inp model is exported and waits for calculation.

7. The method of replacing mechanical impact simulation with static strength simulation according to claim 1, characterized in that: Step C, specifically: the equivalent static strength of different parts in different directions is different, so simulation verification in three directions is required, here we take 750m / s 2 Serves as an equivalent load for static strength simulation.

8. The method of replacing mechanical impact simulation with static strength simulation according to claim 1, characterized in that: Step D1, specifically: use the finite element simulation pre-processing software Hypermesh Abaqus block to open the inp format model exported in step B2, and change the acceleration of the entire model to 750m / s 2 , X, Y, and Z directions need to be loaded separately, and the inp model needs to be exported and wait for calculation.

9. The method of replacing mechanical impact simulation with static strength simulation according to claim 1, characterized in that: Step D3 is as follows: using Hyperview software, reading the odb file from the previous step, and reading and counting the maximum stress results of each part.

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