Seat hard point and hard point size rapid simulation calculation method

A simulation calculation, hard point technology, applied in design optimization/simulation, sustainable transportation, geometric CAD, etc., can solve the problems of hard point and hard point size error, waste of time and money, etc., to achieve accurate and objective results and low investment , easy to evaluate and improve the effect

Pending Publication Date: 2022-07-08
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the large material and geometric nonlinearity of foam materials, shapes, skeleton springs, etc., there are often unacceptable errors between the actual hard point and hard point size and other parameters and the design target, making the current development method There is a lot of blindness early in the design
It is often found in the later verification that the expected target value has not been achieved, so multiple rounds of design revisions and verification design and development iterations are required, wasting time and money

Method used

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  • Seat hard point and hard point size rapid simulation calculation method
  • Seat hard point and hard point size rapid simulation calculation method
  • Seat hard point and hard point size rapid simulation calculation method

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specific Embodiment approach

[0042] In order to clearly and completely describe the technical solution of the present invention and its specific working process, with reference to the accompanying drawings, the specific embodiments of the present invention are as follows:

[0043] In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] In the...

Embodiment 1

[0046] like figure 1 As shown, this embodiment provides a fast simulation calculation method for seat hard points and hard point sizes, which specifically includes the following steps:

[0047] Step S1: Establish a finite element model of the dummy, including:

[0048]S11: By extracting the contour surface of the standard dummy or the standard human body on the side that is in contact with the seat, as the contour component of the model, and dividing it into finite element meshes by triangular shell elements;

[0049] Among them, the shape of the dummy finite element model is established based on standard dummy tools or standard human body surface. The contour components of the dummy model include shoulder contour, back contour, waist contour and hip contour. The beam components of the dummy model include hip beam, Waist beam, back beam, connecting beam, shoulder beam and trunk beam;

[0050] The size of the shoulder profile is 250mm, the size of the back profile is 150mm, t...

Embodiment 2

[0068] To design and check the seat whose design target population is the 95th percentile of men and has a geometric model, it is necessary to obtain the hard point coordinates and hard point size of the seat.

[0069] The method for fast simulation calculation of seat hard point and hard point size in this embodiment specifically includes the following steps:

[0070] Step S1: Extract the body surface of the 95th percentile man in the sitting posture, including the body surface of the buttocks, waist, back and shoulders; press image 3 and Figure 4 The size of the body surface contour surface is required to be intercepted as each contour component (which is a curved surface rather than a solid body); among them, the shoulder contour height is 250mm, the back contour height is 150mm, the waist contour height is 75mm, the total width is 405mm, and the total length is 500mm. The total height is 595mm; necessary geometric cleaning is performed, and a finite element mesh is draw...

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Abstract

The invention discloses a seat hard point and hard point size rapid simulation calculation method, and belongs to the technical field of seat development, and the method comprises the steps: building a dummy finite element model, building a finite element model of a to-be-tested seat, building a transmission relation, applying a boundary condition, and defining and outputting a simulation result. According to the method, the finite element simulation technology is used for conducting rapid simulation measurement on the hard point and the size of the hard point, when a simulation result and a design target reach a certain consistency degree, a sample piece is manufactured for physical verification, and evaluation and improvement of a design scheme in the concept stage are facilitated. In addition, the method also has the characteristics of low investment, low cost, convenience, rapidness, accurate and objective result, flexible application and the like. An accurate transmission relation between model input and parameter output is found, the complexity of the model is reduced as much as possible, and the accuracy of a result is improved. The simulation technology is utilized to directly avoid multiple times of sample piece trial-manufacturing and testing, and rapid measurement and verification can be rapidly and conveniently carried out at any time in the design process.

Description

technical field [0001] The invention belongs to the technical field of seat development, and in particular relates to a hard point of a seat and a fast simulation calculation method for the size of the hard point. Background technique [0002] In modern society, people have higher and higher requirements for car driving experience. Among them, as a support for the driver and passengers, it provides the driver and passenger with a seat that is easy to operate, comfortable and safe for driving and sitting, and its characteristics such as comfort more and more people are paying attention. To this end, the industry has summarized a lot of key data for designing seats, that is, hard points. Designing and manufacturing a seat with a reasonable hard point is a must for seat comfort. In order to better reverse and verify the key hard points of the seat, a variety of dummy tools have been designed in the industry to physically measure the hard points and hard point dimensions of ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17
CPCG06F30/23G06F30/17Y02T90/00
Inventor 任金东张天明
Owner JILIN UNIV
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