Arrangement structure for rear floor ribs of car

Abstract

The invention relates to an arrangement structure for rear floor ribs of a car. The arrangement structure for the rear floor ribs of the car comprises a first transverse rib arranged at the lower left portion of a rear floor of the car, a second transverse rib arranged above the first transverse rib, a third transverse rib arranged at the upper left portion of the rear floor of the car, a plurality of rows of transverse ribs arranged in the middle of the rear floor of the car from top to bottom, and a vertical rib which is arranged at the left side of the rear floor of the car and communicated with the rows of transverse ribs. The arrangement structure for the rear floor ribs of the car is characterized in that a plurality of columns of vertical ribs are arranged in the middle of the rear floor of the car from left to right and are vertically communicated with the rows of transverse ribs. The arrangement structure for the rear floor ribs of the car has the advantages of only changing the arrangement method of the rear floor ribs but not increasing the mass, enabling the rigidity of the rear floor to be better than that adopting an existing arrangement structure of the rear floor ribs of the car, largely improving the result of the noise transfer function, improving NVH performance, being suitable for arrangement of all flat floor ribs, and being suitable for arrangement of ribs of a high-floor micro bus on a large plane.

Description

technical field [0001] The invention relates to automobile parts, in particular to an arrangement structure of rear floor ribs of automobiles. Background technique [0002] The noise transfer function, that is, the noise level at which a unit load is applied at the attachment point of the chassis and the engine system and the body, and the sound pressure at the human ear is measured, is an important indicator to measure the NVH performance of a vehicle. The quality of the rear floor structure has a direct impact on the noise transfer function of each attachment point. In the existing rear floor structure, the distribution of the ribs is unreasonable, and the distribution method of the ribs is single, with only horizontal ribs and no vertical ribs. The defects of this structure will lead to insufficient local rigidity of the rear floor, so that the mode of the rear floor and the mode of the acoustic cavity are at specific frequencies. There is a serious coupling phenomenon a...

AI Technical Summary

Problems solved by technology

In the existing rear floor structure, the distribution of the ribs is unreasonable, and the distribution mode of the ribs is single. There are only horizontal ribs but no vertical ribs. The defects of this structure will lead to insufficient local stiffness of the rear floor, so that the mode of the rear floor and the mode of the acoustic cavity are at a specific frequency. There is a serious coupling phenomenon, which leads to unsatisfactory results of the noise transfer function and affects the ride comfort of the driver and passengers

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