A Method of Load Spectrum Construction for Big Operation Vehicle Based on User Goal

Abstract

The traditional design of big operation vehicle mainly depends on the experience due to almost neglecting the influence of reliability in actual operating condition and varying road of roughness. A method of user goal’s load spectrum construction for reliability research of big operation vehicle was proposed. Speed operating condition was established and GPS data of vehicle operation was analyzed based on researching the user information of the passenger transportation enterprise, considering the characteristics of large passenger operation of the line and according to the road type on the running route segments. The change between spectral density of road pavement with using year was regressed and derived based on regression of the relationship between riding quality coefficient with using year, combination with pavement riding quality index and international roughness index, and pavement density dependence index with power spectrum. Load of users’ operating speed condition under different using age and user goal’s load spectrum under design life for big operation vehicle was obtained on the collection of user road load and establishing and verification of vehicle dynamics model. This method can provide reference for reliability research of big operation vehicle.