Comparison of the curve negotiation properties of two different articulated monorail vehicles

Journal of Low Frequency Noise, Vibration and Active Control

Zeng

et al. 2019

Self Cite

Wheel out of round, which has a significant influence on the ride comfort of vehicles, is very difficult to detect, especially for vehicles with rubber tires like a monorail. The prominent feature of wheel eccentricity caused by wheel out of round is that there will be a dominant frequency of the vehicle acceleration that varies with the speed of the vehicle, while the wavelengthes are all equal to the wheel circumference. By studying the experimental results of Chongqing straddle monorail, an indirect detection method of the wheel out of round is put forward. Then a simulation model of the monorail vehicle under the influence of the wheel out of round is established. The numerical analysis and experimental results lead to that the main reason for the abnormal vibration of the vehicle is the wheel out of round. Through the analysis of the vertical dynamic equation of the monorail system, all other factors that may affect the dominant frequency of vehicle vibration are analyzed. Finally, it is concluded this abnormal vibration caused by wheel out of round can only be reduced by increasing the vertical stiffness of the air spring and car body mass other than changing wheels.

Section: Experimental Analysis Of the Results Of The Straddle Monorailmentioning

confidence: 99%

Detection and alleviation of the abnormal vibration of the monorail based on experiment and simulation

Journal of Low Frequency Noise, Vibration and Active Control

Zeng

et al. 2019

Self Cite

“…In the traditional study of railway vehicles, if a single peak frequency of simulation acceleration is consistent with the experiment data, the simulation is successful [14][15][16]. By scaling the amplitude and wavelength of road irregularities and modifying some vehicle parameters, the author [17,18] has made a single peak frequency of the car body simulation acceleration close to the measured value. However, there is a significant error between the scaled road spectrum and the theoretical value.…”

Section: Introduction 11 Backgroundmentioning

confidence: 86%

The intelligent mathematic method in track excitation calculation of monorail based on vehicle signals

Zhang

Chen

et al. 2022

Preprint

Self Cite

This paper put forward an indirect method to measure the road irregularities of the monorail. Parallel computation, fused with the genetic algorithm, is used to calculate road irregularities and detect wheel failure. By intelligently modifying the vehicle parameters, the multi-rigid body model's simulation result could be close to the test data. This method overcomes the problem that the transfer function cannot be applied to the nonlinear system and the shortcoming of significant errors in the simplification process of the mathematical derivation method. Besides, it improves the traditional algorithm to shorten the calculation time and benefit big data processing. The application of the artificial intelligence method, which includes the intelligent detection of the wheel eccentricity, the brilliant weighing of human subjective judgment, the intelligent matching of the peak frequency signals of the simulation and test data, and so on, could be the highlights of this paper. The result shows the road irregularities calculated in this paper are in good agreement with that theoretical value.

“…The traditional modeling method for vehicle system are the multi rigid body dynamic method and vehiclebridge coupling dynamic method. [31][32][33][34][35][36] The dynamic models of the two method are shown in Figure 7:…”

Section: Simulation Process Of the Vehicle-bridge Coupling Dynamicsmentioning

confidence: 99%

Intelligent batch process method for analyzing the effect of the suspension parameters on the vibration of the suspended monorail

Advances in Mechanical Engineering

Zeng

et al. 2014

Self Cite

As for the batch process, it is needed to carry out a unique simulation for each group of parameters. The simplest method to achieve this goal is to uses the Simulink as the integration space. It cannot solve some complicated dynamic model set up in dynamic software. This paper introduces an intelligent batch program to enable the model solved in the dynamic software during the simulation. This paper also put forward the road equation for the suspended monorail, which has not been introduced before. The results of multi rigid body dynamics and vehicle bridge coupling dynamics are compared in this paper. It proves that the bridge vibration has little effect on the vehicle system. Through the batch process method, the effect of different parameters on the vehicle system could be obtained.