Method for calculating vehicle body A column obstacle angle

A calculation method and obstacle technology, applied in the direction of calculation, geometric CAD, instruments, etc., to shorten the design cycle and speed up the design process

Active Publication Date: 2017-07-28
JILIN UNIV
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Problems solved by technology

However, there is currently no analytical calculatio

Method used

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  • Method for calculating vehicle body A column obstacle angle
  • Method for calculating vehicle body A column obstacle angle
  • Method for calculating vehicle body A column obstacle angle

Examples

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Example Embodiment

[0092] Examples:

[0093] The following uses Toyota Camry body-in-white as an example to calculate the binocular obstacle angle of the A-pillar of the vehicle model to introduce the implementation effect of the present invention.

[0094] (1) Determination of key points

[0095] First, determine the R point (seat reference point) at the hinge point between the torso and the thigh of the dummy model, and then take the R point as the origin of the spatial coordinates, and determine the driver's head rotation center point P according to the collective position relationship of the key points 1 ,see Image 6 .

[0096] (2) Horizontal section S 1 , S 2 OK

[0097] N 1 , N 2 The two points are the upper and lower fixed points of the A-pillar of Camry body, N 1 The point coordinates are (373.8,184.0,725.6), N 2 The point coordinates are (1039.8,361.6,364.3), see Figure 7 .

[0098] P m (43.36,0.00,627.00) on the plane P 0 The equation is: z=627; the horizontal section S is obtained from equatio...

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Abstract

The invention relates to a method for calculating a vehicle body A column obstacle angle, and belongs to the field of vehicle body design of automobiles. The method includes: firstly determining a driver head key point Pm, rotating a plane upward and downward to acquire a plane P1 and a plane P2; acquiring an intersection point according to the plane P1 and a spatial linear equation of an upper fixing point and a lower fixing point of an A column, using a z coordinate of the intersection point as an equation of a horizontal cross section S1; acquiring a linear equation of a random point C of an upper and lower fixing point cross section and a corresponding point C' according to the spatial linear equation of the upper fixing point and the lower fixing point of the A column, calculating an intersection point D1 between the A column and the horizontal cross section S1 through simultaneous solution of the CC' linear equation and the horizontal cross section S1, and projecting the point to a horizontal plane P0 to acquire a projection point D1'; approximatively determining an inner tangent point a and an outer tangent point b, determining coordinates of a left eye point E1 and a right eye point E2 of a driver according to a geometrical relationship formed by an inner tangent line and an outer tangent line, and calculating an included angle alpha as a dual eye obstacle angle of a vehicle body A column. The method is suitable for all the passenger vehicles, can provide a new method for design of enterprise vehicle body A columns, can shorten the design cycle of A column cross sections, and can accelerate the design process.

Description

technical field [0001] The invention relates to the field of automobile body design, in particular to a calculation method for an A-pillar obstacle angle of a vehicle body. Background technique [0002] At present, computer-aided design and analysis technology has been widely used in the automobile industry, and various aspects of passenger car body-in-white can be designed and checked through computers. However, there is currently no analytical calculation method that can calculate the A-pillar obstruction angle. Contents of the invention [0003] The purpose of the present invention is to provide a method for calculating the obstacle angle of the A-pillar of the vehicle body, which fills up the gap in the industry. The invention provides a calculation method for the obstacle angle of the A-pillar of a passenger car in combination with national standards. The invention of this calculation method can provide a new method for the design and verification of the A-pillar of ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15
Inventor 左文杰卢亚运白建涛马洪刚桂春阳王威
Owner JILIN UNIV
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