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A method and device for establishing a body joint model

A method of building a car body, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as low calculation accuracy, and achieve the effect of improving stiffness calculation accuracy

Active Publication Date: 2017-04-12
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low calculation accuracy when rigid body joint units are used instead of body joints, an embodiment of the present invention provides a method and device for establishing a body joint model

Method used

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  • A method and device for establishing a body joint model
  • A method and device for establishing a body joint model
  • A method and device for establishing a body joint model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The embodiment of the present invention provides a method for establishing a body joint model, see figure 1 , the method flow includes:

[0055] In step 101, a first body joint is intercepted from a body-in-white model.

[0056] Wherein, the first body joint includes at least two branches.

[0057] Wherein, the length of each branch of the intercepted first body joint may be 80-150 mm.

[0058] In step 102, a joint model of a first body joint is established.

[0059] Wherein, the joint model includes several spring groups, the first ends of the several spring groups are connected together and the connection points of the several spring groups are the connection points of the branches of the first vehicle body joint. The number of spring sets is the same as the number of branches of the first body joint, one spring set corresponds to one branch of the first body joint, and the extension direction and length of each spring set are respectively the same as the extension...

Embodiment 2

[0064] The embodiment of the present invention provides a method for establishing a body joint model, see figure 2 , the method flow includes:

[0065] In step 201, a first body joint is intercepted from a body-in-white model.

[0066] Wherein, the first body joint includes at least two branches.

[0067] Wherein, the length of each branch of the intercepted first body joint may be 80-150 mm.

[0068] In this embodiment, the body-in-white model may be a simplified body model established in the early stage of body design. In this simplified model of the body, the main load-carrying bar-beam structural parts of the body, such as A, B and C columns, the peripheral beams of the roof, and the front and rear longitudinal beams and side beams of the underframe, are all simulated by thin-walled beams; Carriers, such as the floor, roof, wheel housings, front and rear panels, and rear fenders, are modeled with plate-shell elements.

[0069] In step 202, a joint model of a first bod...

Embodiment 3

[0092] An embodiment of the present invention provides a device for establishing a body joint model, see Figure 5 , the device includes an intercepting module 301 , an establishing module 302 and a determining module 303 .

[0093] The clipping module 301 is used to clip a first body joint from the body-in-white model, and the first body joint includes at least two branches.

[0094] The establishment module 302 is used to establish a joint model of the first vehicle body joint; wherein, the joint model includes several spring groups, the first ends of the several spring groups are connected together and the connection points of the several spring groups are each of the first vehicle body joint. The connection point of the branch, the number of spring groups is the same as the number of branches of the first body joint, one spring group corresponds to one branch of the first body joint, and the extension direction and length of each spring group are respectively corresponding...

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Abstract

The invention discloses a method and a device for establishing a body joint model, belonging to the field of automobiles. The method includes: intercepting the first body joint from the body-in-white model; establishing a joint model of the first body joint; the joint model includes several spring groups, the first ends of the several spring groups are connected together and the connection points of the several spring groups are the first The connection point of each branch of the body joint, one spring group corresponds to a branch of the first body joint, the extension direction and length of each spring group are respectively the same as the extension direction and length of the corresponding branch, and each spring group includes the first spring and the second spring, the second end of the first spring is fixedly connected with the first end of the second spring; determine the stiffness parameters of each spring in the joint model when simulating the corresponding branch loading condition; the rotational stiffness of the first spring is rigidity and the translational stiffness is the translational stiffness of the corresponding branch; the rotational stiffness of the second spring is the rotational stiffness of the corresponding branch and the translational stiffness is rigid.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method and device for establishing a body joint model. Background technique [0002] Automobile body stiffness is an important index that affects the performance of noise, vibration, and harshness (NVH) and structural durability of automobiles. In order to ensure the high performance of the car, it is very important to analyze and test the body stiffness in the early stage of body design and development. For a long time, building a simplified model of the car body to analyze and test the body stiffness is a common method in the early stage of car body design. In the simplified model of the body, simplified beam elements are used to simulate the beam-like structure in the body, plate and shell elements are used to form the large coverage of the body, and rigid joint elements are used to replace the main joint structure of the body. [0003] In the process of realizing the present in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 聂传红王力叶远林寇世宏
Owner CHERY AUTOMOBILE CO LTD