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Non-linear dynamic model for frontal crash of vehicles

A technology of nonlinear dynamics and mechanical models, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the inability to obtain the digital model of the entire vehicle, the lack of the geometric model of the entire vehicle, etc.

Active Publication Date: 2010-06-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the conceptual design stage of the car, on the one hand, it is necessary to establish different substructure parameter libraries (including the size and stiffness of the body structure, material properties, connection methods and related mechanical properties, etc.) There is also a lack of a detailed geometric model of the entire vehicle used to establish a digital virtual prototype, so a complete digital model of the entire vehicle cannot be obtained

Method used

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  • Non-linear dynamic model for frontal crash of vehicles
  • Non-linear dynamic model for frontal crash of vehicles
  • Non-linear dynamic model for frontal crash of vehicles

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Embodiment Construction

[0035] The following first explains the modeling principle:

[0036] 1. Analysis of collision process of automobile frontal barrier:

[0037] When the car collides head-on with the fixed barrier at a certain initial speed, as the contact between the car and the fixed barrier occurs, a collision between the car and the barrier begins. With the generation of relative displacement between the occupant and the vehicle body, the occupant restraint system starts to work to provide the occupant with deceleration force.

[0038] Since the occupant is very likely to have a secondary collision with the steering mechanism in the event of a frontal collision, the energy-absorbing characteristics of the steering mechanism can be considered in the design of the steering shaft, the steering shaft release device, and the steering wheel.

[0039] In the present invention, it is assumed that the airbag has been deployed when a frontal collision occurs. When the relative displacement between t...

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Abstract

The invention provides a non-linear dynamic model for frontal crash of vehicles, which is integrated with lumped parameter models IPSIM of frontal primary crash and frontal secondary crash of the vehicles, and is used for designing crash safety performance in a vehicle new model developing process, and is also used for studying primary and secondary crash processes of the frontal crash of the vehicles. At a concept designing stage of the vehicles, designers disintegrate functions and crash performance of each sub-system and structural parts of the vehicles by adopting the dynamic model, design the characteristics of the crash performance and a passenger restriction system of the model according to actual requirements, and analyze and evaluate the structure crashworthiness of the whole vehicle or certain parts and the safety of the passengers according to related standard of crash safety so as to guide optimization of the vehicle structure.

Description

technical field [0001] The present invention relates to a simplified automobile centralized parameter model, in particular to a nonlinear dynamic model of automobile frontal collision, which is a centralized parameter model IPSIM (Integrated Primary and Secondary ImpactModel) which integrates automobile frontal primary and secondary collisions. In the conceptual design stage of new models, design the characteristics of the structural components and restraint systems of the car, analyze and evaluate the frontal collision performance between the car and the rigid barrier and the safety of the occupants, and further guide and develop safety-based car structures Optimized design. Background technique [0002] The frontal collision of a car includes two processes, namely "primary collision" and "secondary collision". The primary collision refers to the collision between the car and the fixed barrier, while the secondary collision refers to the collision between the occupants in ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 吴光强盛云王平鞠丽娟
Owner TONGJI UNIV