Reliability Test of Taxis Based on Typical User Road

2014 ◽  
Vol 505-506 ◽  
pp. 343-348
Author(s):  
San Xia Wang ◽  
Lu Zhang ◽  
Chong Bo Zhang ◽  
Wen Liang Li ◽  
Wei Zhou
Keyword(s):  
Load Distribution ◽  
Test Method ◽  
Reliability Test ◽  
Fatigue Reliability ◽  
Counting Method ◽  
Load Spectrum ◽  
The Road ◽  
Calculation Results ◽  
Quantitative Basis ◽  
Typical User

In order to study the fatigue reliability of taxis, a test method that correlated typical user road with proving ground reliability road is proposed. According to the result of investigation, after taking the road test on the user road, the load spectrum of taxis on the condition of typical user road is obtained. Then the rain flow counting method is used to obtain the load distribution matrixes through analyzing the two groups of data that are tested above , and with pseudo damage as a quantitative basis for the calculation of taxis fatigue damage that generated from load spectrum, an equivalent relationship is established between the two. The calculation results indicate that the ratio of damage of the typical user road to proving ground reliability road is 1 to 148.8, if regarding 600,000 km as total scrapped mileage of a taxi, 4,000 km reliability test on proving ground can achieve the same damage.

Study on Road Simulation Test of Motorcycle

2010 ◽  
Vol 29-32 ◽  
pp. 1556-1561
Author(s):  
Xiao Hui Shi ◽  
Xi Hong Zou ◽  
Ping Yang
Keyword(s):  
Strain Gauge ◽  
Rear Axle ◽  
Test Method ◽  
Parameter Control ◽  
Load Spectrum ◽  
Simulation Test ◽  
The Road ◽  
Road Load ◽  
Simulator Test ◽  
Gravel Road

The principle of remote parameter control(RPC) and test method of road simulator test are analyzed, and the road simulation test of motorcycle is implemented with road simulator produced by MTS company. Firstly, by disposing strain gauge and accelerometer, the load spectrum of motorcycle is sampled when the motorcycle runs on gravel road and concrete road with constant speed. Then using the front and rear axle acceleration as desired response signals, the simulation iteration and road simulation test are conducted. At last, the key problems of motorcycle road simulation test are solved. The result shows that the desired response signals and the monitor signals are well matched, and the road load spectrum of motorcyle is accurately reproduced.

Study on Reliability Test Method of Heavy Duty Vehicle Based on Proving Ground

2012 ◽  
Vol 614-615 ◽  
pp. 460-463
Author(s):  
Yu Zhuo Men ◽  
Hai Bo Yu ◽  
Xin Pan
Keyword(s):  
Load Distribution ◽  
Correlation Equation ◽  
Test Method ◽  
Reliability Test ◽  
Test Results ◽  
Heavy Duty ◽  
Test Specifications ◽  
Heavy Duty Vehicle ◽  
Load Carrying ◽  
Cumulative Fatigue Damage

A new method for correlation test was presented to study the reliability of a heavy duty vehicle, and the method can combine the real customer usage with the enhancement test on proving ground, and avoid the test blindness. Aiming at the data that were tested on the typical pavements of the customer and enhancement roads of proving ground, the rain-flow counting method was used to obtain the load distribution matrixes , according to the correlation equation, the cumulative fatigue damage and loading spectrums of the 90% customer and proving ground were optimized and calculated. Through the correlation analysis, the pavements enhancement coefficient and the reliability test specifications were obtained. The test results indicate that the new specifications can predict the potential failures of the load carrying structures quickly, shorten the test cycles.

Road Load Spectrum Collection and Analysis of AMT Actuating Mechanism

2012 ◽  
Vol 605-607 ◽  
pp. 895-898
Author(s):  
Xi Hong Zou ◽  
Kai Qiao ◽  
Xiao Hui Shi
Keyword(s):  
Statistical Analysis ◽  
Boundary Conditions ◽  
Reliability Analysis ◽  
Strain Gauges ◽  
Fatigue Reliability ◽  
Load Spectrum ◽  
The Road ◽  
Road Load ◽  
Computer Aided ◽  
Automated Manual Transmission

Road load spectrum is not only the prerequisites of fatigue reliability analysis and test of AMT(Automated Manual Transmission) actuating mechanism, but also the input and boundary conditions of CAE(Computer Aided Engineering). Based on analysis of AMT motion and force, the measuring points of road load spectrum are determined, and the accelerometers and strain gauges are installed. Then the road load spectrum of AMT actuating mechanism is collected on Xiangfan Automobile Proving Ground according to related standards. At the same time the acquired road load spectrum is analyzed, such as pretreatment, repeatability checking and statistical analysis. The results indicate that the acquired road load spectrum is well reliable and repeatable, which provides effective basic data for design, analysis and verification of AMT actuating mechanism.

Test Analysis and Optimal Design of Fatigue Life for FF Mechanical Transmission

2013 ◽  
Vol 718-720 ◽  
pp. 1468-1471
Author(s):  
Jin Jun Zheng ◽  
Yan Hong Peng
Keyword(s):  
Fatigue Life ◽  
Test Method ◽  
Mechanical Transmission ◽  
Load Spectrum ◽  
Test Analysis ◽  
The Road ◽  
Road Load ◽  
Comprehensive Test ◽  
Bearing Assembly ◽  
The Given

According to the road load spectrum and the given engines parameters of a car, a comprehensive test method which can analyze and optimize the reliability life of gear and bearing assembly for FF mechanical transmission has put forward. This test method can diagnose the fatigue damaged components of the transmission and provide experimental support for optimizing the structure of the transmission as well as improving the transmission performance and the overall fatigue life.

The Vibration Response Analysis for a Car Left Front Shaft Head Based on User Conditions

2011 ◽  
Vol 52-54 ◽  
pp. 1187-1192
Author(s):  
Zhi Ping Guo ◽  
Lian Lei Wang ◽  
Wei Zhou ◽  
Wen Liang Li ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Spectral Density ◽  
Response Analysis ◽  
Load Spectrum ◽  
Density Data ◽  
The Road ◽  
Power Spectral ◽  
Quantitative Results ◽  
Left Front ◽  
Typical User ◽  
User Condition

As one of the main reason of fatigue failure, vibration has received more attention in reliability and comfort research on vehicles. The shock from bumpy roads has a great impact to the fatigue of vehicle parts and components. The method of survey user conditions is described for the road test in the article, and three accelerating data of X, Y, Z directions of a vehicle left shaft position have been obtained with the typical user condition. Through studied the data, we have obtained the load spectrum and the power spectral density data of one car. The obtained quantitative results from the analysis can be used for evaluating the comfort of using vehicle.

Investigations of Road Wear Caused by Studded Tires

2014 ◽  
Vol 42 (1) ◽  
pp. 2-15
Author(s):  
Johannes Gültlinger ◽  
Frank Gauterin ◽  
Christian Brandau ◽  
Jan Schlittenhard ◽  
Burkhard Wies
Keyword(s):  
Traffic Safety ◽  
Test Bench ◽  
Operating Conditions ◽  
Test Method ◽  
Analytical Models ◽  
The Road ◽  
Driving Speed ◽  
Major Factors ◽  
Tire Friction ◽  
Variable Operating Conditions

ABSTRACT The use of studded tires has been a subject of controversy from the time they came into market. While studded tires contribute to traffic safety under severe winter conditions by increasing tire friction on icy roads, they also cause damage to the road surface when running on bare roads. Consequently, one of the main challenges in studded tire development is to reduce road wear while still ensuring a good grip on ice. Therefore, a research project was initiated to gain understanding about the mechanisms and influencing parameters involved in road wear by studded tires. A test method using the institute's internal drum test bench was developed. Furthermore, mechanisms causing road wear by studded tires were derived from basic analytical models. These mechanisms were used to identify the main parameters influencing road wear by studded tires. Using experimental results obtained with the test method developed, the expected influences were verified. Vehicle driving speed and stud mass were found to be major factors influencing road wear. This can be explained by the stud impact as a dominant mechanism. By means of the test method presented, quantified and comparable data for road wear caused by studded tires under controllable conditions can be obtained. The mechanisms allow predicting the influence of tire construction and variable operating conditions on road wear.

scholarly journals Laboratory experiment on the nano-TiO2 photocatalytic degradation effect of road surface oil pollution

2020 ◽  
Vol 9 (1) ◽  
pp. 922-933
Author(s):  
Qing’e Wang ◽  
Kai Zheng ◽  
Huanan Yu ◽  
Luwei Zhao ◽  
Xuan Zhu ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Oil Pollution ◽  
Road Surface ◽  
Test Method ◽  
Driving Safety ◽  
The Road ◽  
Road Surfaces ◽  
The Many ◽  
The Impact ◽  
Degradation Effect

AbstractOil leak from vehicles is one of the most common pollution types of the road. The spilled oil could be retained on the surface and spread in the air voids of the road, which results in a decrease in the friction coefficient of the road, affects driving safety, and causes damage to pavement materials over time. Photocatalytic degradation through nano-TiO2 is a safe, long-lasting, and sustainable technology among the many methods for treating oil contamination on road surfaces. In this study, the nano-TiO2 photocatalytic degradation effect of road surface oil pollution was evaluated through the lab experiment. First, a glass dish was used as a substrate to determine the basic working condition of the test; then, a test method considering the impact of different oil erosion degrees was proposed to eliminate the effect of oil erosion on asphalt pavement and leakage on cement pavement, which led to the development of a lab test method for the nano-TiO2 photocatalytic degradation effect of oil pollution on different road surfaces.

Kinematics and Dynamics Simulation Research for Roller Coaster Multi-Body System

2011 ◽  
Vol 421 ◽  
pp. 276-280 ◽  
Author(s):  
Ge Ning Xu ◽  
Hu Jun Xin ◽  
Feng Yi Lu ◽  
Ming Liang Yang
Keyword(s):  
Structural Design ◽  
3D Model ◽  
Structure Design ◽  
Dynamics Simulation ◽  
Body System ◽  
Load Spectrum ◽  
Roller Coaster ◽  
Simulation Research ◽  
Calculation Results ◽  
Multi Body

To assess the roller coaster multi-body system security, it is need to extract the running process of kinematics, dynamics, load spectrum and other features, as basis dates of the roller coaster structural design. Based on Solidworks/motion software and in the 3D model, the calculation formula of the carrying car velocity and acceleration is derived, and the five risk points of the roller coaster track section are found by simulation in the running, and the simulation results of roller coaster axle mass center velocity are compared with theoretical calculation results, which error is less than 4.1%, indicating that the calculation and simulation have a good fit and providing the evidence for the roller coaster structure design analysis.

Load Calculation and Life Prediction for Auto Water Pump Bearing

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Zhengmei Li ◽  
Qiong Zhou ◽  
Jianping Tang ◽  
Jianwen Wang ◽  
Qi An
Keyword(s):  
Load Distribution ◽  
Normal Load ◽  
Analytical Calculation ◽  
Engineering Application ◽  
Water Pump ◽  
Bearing Load ◽  
Calculation Results ◽  
Bearing Design ◽  
Bearing Loads

Taking the water pump bearing with one roller row (WR)-type auto water pump bearing as a research sample, an analytical calculation method is developed to improve the accuracy and efficiency of the current calculations for the bearing loads and life in engineering application. Considering the misalignment due to the deflection of the bearing spindle, the bearing internal loads and deformations under the action of the complicated external space loads are obtained. The bearing fatigue life including the lives of the rollers and the balls is also calculated with considering the non-normal load distribution caused by the spindle deflection and the roller tilt. The bearing load and life calculation results are compared with those calculated by the traditional method in which the deflection of the bearing spindle and the roller tilt are ignored. The effects of the bearing spindle deflection on the load distribution and the life of the auto water pump bearing are analyzed and discussed. The life decrease in the auto water pump bearing is significant due to the deflection of the bearing spindle and it is recommended to give more attention to this deflection for the high quality of the bearing design and calculation.

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