Simplified and relatively precise back-calculation method for the pavement excitation of the 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.

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

“…This process will be more difficult for monorail because the monorail structure is much more complex, and any simplification of the actual monorail structure will lead to errors. The author [12] has calculated the monorail road irregularities through the acceleration of the car body and bogie. By neglecting the influence of the vehicle pitch angle, the dynamic equation of the vehicle system is greatly simplified.…”

Section: Introduction 11 Backgroundmentioning

confidence: 99%

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.

“…14,15 The vehicle-bridge coupling dynamics is needed in studying the interaction of the vehicle and bridge. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] Due to the weakness of the traditional integral algorithm, a rather simple finite element (FE) model of the bridge and the dynamic model of the vehicle is built. Through this model, with one-third octave band spectral analysis, Lee et al 31 studied the ride comfort of the straddle monorail.…”

Section: Introductionmentioning

confidence: 99%

Influence of bridge parameters on monorail vehicle–bridge system— A research with multi-rigid body and multi-flexible body coupling theory and Park method

Journal of Low Frequency Noise, Vibration and Active Control

Zeng

et al. 2020

Self Cite

The parameters of the monorail bridge, which have a significant effect on the vehicle, are analyzed in this paper. With Park method, a complicated solver of the second order with a variable step size, equations insolvable to traditional methods can be solved and a more complicated dynamic model could be built. Different from some traditional simulation of vehicle–bridge coupling system, the bridge is divided into the girder and piers. The finite element model of each part is created separately in Ansys and coupled with the vehicle system in UM, which helps the analysis of the interaction forces between flexible components and better simulation accuracy can be obtained. FIALA model is used to calculate the wheel force. These methods make the measurement more precise. The study shows that all the variables except for the stiffener thickness have little effect on the vibration of the vehicle due to the good vibration reduction performance of the vehicle system. The resonance of the girder could be avoided by changing the thickness of the stiffeners and web plates. In addition, high stiffness and damping of the connection point of the girder and pier are helpful in alleviating the vibration of the bridge.