Design method and design device for pushing cushion block of door protection plate

Abstract

The invention relates to the technical field of automobile structure design, in particular to a design method and a design device for a door protection plate pushing cushion block. The method comprises the following steps: S1, determining a chest compression amount target value and a pelvic resultant force required value; s2, constructing a two-dimensional relation curve among the chest compression amount, the pelvic resultant force and the pushing cushion block span point distance; s3, determining a theoretical value range of the cross-point distance of the pushing cushion block; s4, determining a theoretical value range of the action area of the pushing cushion block; s5, constructing a three-dimensional relation curved surface of the chest compression amount, the pushing cushion block span point distance and the pushing cushion block action area; and S6, selecting a proper design value of the cross-point distance of the pushing cushion block and a design value of the action area of the pushing cushion block, and determining the material type of the pushing cushion block. The design method disclosed by the invention is simple and efficient, and the design parameters of the pushing cushion block can be quickly obtained on the premise of meeting the Chinese new vehicle evaluation regulations and vehicle model project development targets.

Description

technical field [0001] The invention relates to the technical field of automobile structure design, in particular to a design method and design device of a door guard plate pushing pad. Background technique [0002] In existing cars, in the event of a side impact, the protection systems in the door guards come into play. In addition to conventional side airbags, push pads are included in the door guards. The push block is a fixed structure fixed in the door guard. Its working principle is that when a side collision occurs, the push block absorbs the collision energy of the door guard and moves into the vehicle, and pushes the occupant's legs to keep the occupant away from the door guard to avoid the collision. This protects occupants from damage caused by intrusion of the door guards. The structure of the conventional push pad is as follows figure 1 Described (already used on a certain model of Dongfeng Citroen on the market), it includes a bottom plate facing the outer p...

AI Technical Summary

Problems solved by technology

Therefore, in the design stage, it is necessary to determine the distance between the push pad and the span of the occupant and the action area of ​​the push pad, and there is no design and determination scheme for this in the prior art

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