CN104978454A - Method for solving front windshield glass calculation errors in CAE offset impact - Google Patents

Abstract

The invention relates to a method for solving front windshield glass calculation errors in CAE offset impact. The method comprises the following steps of: 1) establishing a model: on the basis of an existing front windshield glass finite grid, copying the same parts, forming double-layer front windshield glass structures, and connecting the double-layer structures in a node coupling mode, wherein the thickness is 5 mm; 2) setting the material texture: endowing front windshield glass with two material properties, endowing a glass-layer I part with an MAT123 MAT_MODIFIED_PIECEWISE_LINEAR_PLASTICITY material model in ls-dyna software, and endowing a glass-layer II part with an MAT7_BLATZ-KO_RUBBER material model in the ls-dyna software; and 3) debugging the model: debugging, calculating, analyzing and viewing a post-processing result.

Description

Solve the method for CAE offset collision windshield glass miscount

Technical field

The invention belongs to automobile manufacturing field, is a kind of method solving the miscount of CAE offset collision windshield glass specifically.

Background technology

In recent decades, the real train test of vehicle collision security is the authoritative means of examination Vehicle Passive Safety always.Under the guiding of guidance system, vehicle hits honeycomb aluminum obstacle.Whole collision process is recorded by high-speed camera equipment so that playback is to reproduce at a slow speed, arranged by the data of electrical measuring systems by the sensor collection be arranged in car, the result obtain arrangement and standard contrast, to examine the collision performance of tested vehicle.In reality, the collision physical test cycle is long, and costly, image data exists limitation.Along with the development of technology of numerical simulation, become the important method improving Vehicle Passive Safety gradually.

Windshield glass is generally an indispensable part in the process of complete automobile collision model buildings.Modern windshield can not become fragment, also still can maintain a monoblock, only directly pierced through by powerful power even if be subject to breaking.Windshield is the same with the effect of roof, is supplied to the extra one deck protection of car when overturning traffic accident.And in complete automobile collision modeling process, can the modeling of windshield glass affect whole vehicle model and calculate and restrain.The method that tradition connects is in business pre-processing software, and direct utility command carries out stress and strain model, then gives MAT32 material.But the method front windshield with send out cover left hinge there is fierce collision time, windshield glass easily occurs and makes mistakes and cause calculating and stop, therefore existence calculating not easily convergence, result debug time are long, cause the problem that the project cycle is long.

Summary of the invention

The object of this invention is to provide a kind of method solving the miscount of CAE offset collision windshield glass, fundamentally solve the problems referred to above.

For achieving the above object, the invention provides following technical scheme: the method for this solution CAE offset collision windshield glass miscount, its technical essential comprises the following steps:

1) build model: on the limited grid basis of existing windshield glass, copy identical parts, forming double-deck windshield glass is structure, is connected by this double-decker by node coupling scheme, and thickness is 5mm;

2) setting material: give windshield glass bi-material attribute, material MAT123 MAT_MODIFIED_PIECEWISE_LINEAR_PLASTICITY material model in ls-dyna software given by glassy layer I part, and MAT7_BLATZ-KO_RUBBER material model in ls-dyna software given by glassy layer II part;

3) debugging model:debug, calculate, analyze and check aftertreatment result.

Simple to operate, computational convergence is high, and car and SUV all can use, and shorten the project cycle greatly, can avoid causing because windshield glass is made mistakes in offset collision calculating stopping.

Accompanying drawing explanation

Fig. 1 is schematic flow sheet of the present invention;

Fig. 2 is the structural representation of windshield glass; Fig. 3 is the position relationship schematic diagram sending out lid side chain and windshield glass.

Description of reference numerals: 1 glassy layer I, 2 glassy layer II, 3 lids, 4 colliding parts, 5 gussets, 6 windshield glass.

Embodiment

Below in conjunction with Fig. 1 ~ 3, describe content of the present invention in detail by specific embodiment.The method of this solution CAE offset collision windshield glass miscount, comprises the following steps:

1) build model: on existing windshield glass finite element grid basis, copy identical parts, now, windshield glass is double-decker, is connected by this double-decker by node coupling scheme, and thickness is 5mm.

2) setting material: give windshield glass bi-material attribute, material MAT123 MAT_MODIFIED_PIECEWISE_LINEAR_PLASTICITY material model in ls-dyna software given by glassy layer I part, and MAT7_BLATZ-KO_RUBBER material model in ls-dyna software given by glassy layer II part.

3) debugging model:debug, calculate, analyze and check aftertreatment result.

Claims (1)

1. solve a method for CAE offset collision windshield glass miscount, comprise the following steps:

1) build model: on the limited grid basis of existing windshield glass, copy identical parts, forming double-deck windshield glass is structure, is connected by this double-decker by node coupling scheme, and thickness is 5mm;

2) setting material: give windshield glass bi-material attribute, material MAT123 MAT_MODIFIED_PIECEWISE_LINEAR_PLASTICITY material model in ls-dyna software given by glassy layer I part, and MAT7_BLATZ-KO_RUBBER material model in ls-dyna software given by glassy layer II part;

3) debugging model:debug, calculate, analyze and check aftertreatment result.