Automobile back door design optimization method based on overall rigidity

Abstract

The invention relates to an automobile back door design optimization method based on overall rigidity. The method comprises the steps that back door bending rigidity analysis is carried out after back door data processing, six degrees of freedom are restrained through hinges, Z-direction translation is restrained at a supporting rod, force is loaded at the position of a door lock in the Z direction, and the bending rigidity is calculated through Z-direction displacement of a loading point; the hinge restrains six degrees of freedom, and the included angle and the torque are calculated by loading the displacement of the two buffer blocks corresponding to the position of the outer plate, so that the edge restraint torsional rigidity is obtained; the hinge restrains six degrees of freedom, Z-direction translation is restrained at the lock catch, force is loaded at the buffer block on one side in the Z direction, and the middle restraint torsional rigidity is calculated through the position displacement and force of the loading point corresponding to the outer plate; the hinge restrains six degrees of freedom, X-direction translation is restrained at the lock catch, force is loaded in the Y direction, and lateral rigidity is calculated through loading point displacement and force. According to the optimization method, the integral rigidity of the back door is calculated and is continuously modified and optimized, so that the time is greatly saved, and the integral rigidity of the back door is easier to meet the target.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a design optimization method for a back door of an automobile based on the overall rigidity. Background technique [0002] In the design process of the car body-in-white, the stiffness of the back door must meet the stiffness target. If the overall stiffness is low or the stiffness of some areas does not meet the target value, the back door will be twisted and deformed during the opening and closing process, and the back door will be bent after opening. , resulting in lateral deformation during the driver's incorrect opening operation. This not only affects the user experience, but also affects the reputation of the car, which in turn affects the sales of cars. Therefore, calculating whether the overall stiffness of the back door meets the target value by an appropriate method in the design stage is a key step in the body-in-white design. In the past, when verif...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a design optimization method for the back door of an automobile based on the overall stiffness to solve the problem of calculating whether the overall stiffness of the back door meets the target value

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