A Method for Recognition of Vehicle Load Spectrum Based on Axle Structure Stress Test
A vehicle load and stress test technology, applied in the field of vehicle engineering, can solve problems such as the identification of the load spectrum of the axle head, and achieve the effect of correct cost and low cost
Active Publication Date: 2020-01-24
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the problem of identifying the load spectrum of the axle head of the automobile axle, and propose a method for identifying the load spectrum of the automobile based on the stress test of the axle, which can replace the expensive wheel six Force component, solving the problem of testing the main component force load spectrum of the wheel axle head
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[0052] A method for vehicle load spectrum identification based on axle stress testing, the specific steps of which include:
[0053] front bridge
[0054] Step one, such as image 3 As shown, four groups of strain sensors are arranged on the cantilever beam structure on the left side of the front axle: the first group is the upper and lower surface strain sensors on the left side of the front axle (measuring point 1) - the average vertical distance from the left tire landing point is R, The left and right horizontal distance is a, the front and rear horizontal distance is 0; the second group is the upper and lower surface strain sensor on the left inner side of the front axle (measurement point 3) - the average vertical distance from the left tire landing point is r, the left and right horizontal distance is c, The front and rear horizontal distance is 0; the third group is the front and rear surface strain sensors on the left side of the front axle (measurement point 2) - th...
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The invention provides a vehicle load spectrum recognizing method based on axle structure stress testing. The method specifically includes the steps of firstly, establishing the transmission relationof six component force of a wheel spindle nose and force of a plurality of key testing points of an axle; secondly, attaching stress sensors to the key testing points on the axle and a transmission shaft, and conducting stress calibrating to obtain a calibration coefficient; finally, measuring the stress signals of the key testing points on the axle and the transmission shaft under the driving working condition of a vehicle, calculating the spindle nose six component force value under a vehicle one-piece coordinate system according to the calibration coefficient and the measured stress signalson the basis of the transmission relation of the force, and recognizing a wheel load spectrum. By means of the method, an expensive wheel six component force instrument can be replaced, and the problem of testing the main component load spectrum of the wheel spindle node is solved.
Description
technical field [0001] The invention belongs to the technical field of vehicle engineering, and in particular relates to a vehicle load spectrum identification method based on vehicle bridge structural stress testing. Background technique [0002] In the past, due to the lack of wheel road load spectrum identification technology and test equipment, domestic and foreign automobile design and development personnel often simply use the parameters such as the vibration acceleration spectrum of the wheel axle head measured during the road test of the car as design input to carry out the loading process. Dynamic design and lightweight design and development of key automotive assemblies or complete vehicles. In addition, due to limited conditions, when conducting road simulation tests, the acceleration or strain signal of the wheel axle head measured in the road test is generally used as the iterative target signal, and the bench and RPC technology are used to reproduce the actual ...
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IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 李惠彬郑召伟王丽荣刘业刚孙立东仇大印王欣
Owner BEIJING INSTITUTE OF TECHNOLOGYGY