Design method of loading compartment for tractor test

Abstract

The invention relates to the technical field of vehicle tests, and discloses a design method of a loading compartment for a tractor test, and the method comprises the steps: carrying out the strain-force relation calibration of a plate spring guide arm, a transverse thrust rod and a plate spring; loading the calibrated parts on a vehicle, and then measuring the load spectrum of the suspension during the loading test of the tractor; establishing a whole tractor power simulation model; simulating the carrying and hanging state of the tractor, and correcting the model according to an actually measured stress result; removing the trailer of the model, modeling the loading compartment, taking the length, width and height of the loading compartment as variables, setting a convergence judgment condition of loading compartment parameter optimization, performing optimization until the loading compartment converges, extracting the length, width and height of the optimized loading compartment, recording the density of the loading compartment, and designing the loading compartment; according to the invention, the equivalent design of the loading compartment can be realized, the reliability of the reliability test of the loading of the back compartment of the tractor at the saddle is effectively improved, and the abnormal damage of chassis parts caused by the non-equivalence of the loading test of the back compartment of the tractor and the loading test of the tractor carrying and hanging is avoided.

Description

technical field [0001] The invention relates to the technical field of vehicle testing, in particular to a design method of a loading compartment for tractor testing. Background technique [0002] Vehicle reliability test is an important method to test vehicle quality. The general tractor reliability test roads include: test ground reinforced roads, mountain roads, and expressways. At present, many domestic automobile factories use the method of loading the back of the saddle instead of the trailer loading when conducting the reliability test of the tractor on the test site to strengthen the road. The main reasons are as follows: [0003] (1) The test site is limited by the strengthened road in the test site. If the turning radius is not large enough, the tractor with a trailer is long and difficult to turn. Therefore, some test sites in China recommend the back of the tractor for testing; [0004] (2) The test of the tractor with a trailer has high requirements on the dri...

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Problems solved by technology

[0005] (3) The trailer of the tractor often breaks down in the reliability test, resulting in longer test time and increased test cost

[0007] In the reliability test, the test results of the vehicle, especially the chassis load-bearing parts, are quite different by using the loading box for loading and using the trailer for loading. Some parts that have been verified for many times by using the trailer for loading tests have no problem after using the loading method. The main reason is that the loading process generally only considers the mass equivalent, that is, the loading mass is basically the same as the saddle mass of the trailer on the saddle of the tractor, but the moment and lateral force are not considered. effect, the design of the loading compartment is more random

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