Computer Simulation Analysis of Light Vehicle Lateral/Directional Dynamic Stability

Author(s):  
R. Wade Allen ◽  
Theodore J. Rosenthal ◽  
David H. Klyde ◽  
Jeffrey R. Hogue
1990 ◽  
Author(s):  
R. Wade Allen ◽  
Henry T. Szostak ◽  
Theodore J. Rosenthal ◽  
David H. Klyde

2006 ◽  
Vol 18 (Supplement) ◽  
pp. 123-123
Author(s):  
AOI OZAKI ◽  
KAZUYUKI MITSUI ◽  
SHIN INADA ◽  
NITARO SHIBATA ◽  
MARK R. BOYETT ◽  
...  

2014 ◽  
Vol 988 ◽  
pp. 315-318
Author(s):  
Bo Yan ◽  
Bin Hu ◽  
Ya Yu Huang ◽  
Tao Yong Zhou

Railway ballast dynamic stability operations is an important work in the line maintenance and repair operations, the selection of dynamic parameter is usually dependent on field trials and practical experience, for lack of theoretical basis. This paper creates discrete element analysis model of railway ballast using the discrete element method, the numerical simulations are carried out to study the lateral ballast resistance during dynamic stability process. We focus on the influence of vibration frequency during dynamic stability process; an optimal vibration frequency of the simulation analysis is obtained and compared with the recommended vibration frequency of a product of a China Railway Large Maintenance Machinery Company, it is found that the two vibration frequencies are basically consistent. This result verifies the correct validity of the discrete element analysis model of railway ballast during dynamic stability process.


Author(s):  
Y. Ito ◽  
H. Komizo ◽  
T. Meguro ◽  
Y. Daido ◽  
I. Umebu

1994 ◽  
Vol 42 (4) ◽  
pp. 467 ◽  
Author(s):  
OJ Reichman ◽  
E Roberts

A number of hypotheses have been proposed to explain the mechanisms that promote coexistence among sympatric rodents in North American deserts. In an effort to determine how the distribution of seeds influences foraging patterns and coexistence in a three-species community of heteromyid rodents, we developed a computer simulation model that determines the efficiency of foraging for animals of different sizes. Specifically, the simulation determines how long it would take a forager to gather sufficient energy for 24 h if the animal stopped at seed patches of certain densities. The analyses were conducted for naturally occurring seed distributions and densities, for simulated normal and uniform distributions at natural densities, and for natural distributions at seed densities one-third those known to occur naturally. The results indicate that, under natural distributions and densities, each of the three species possessed unique optima for utilising seed patches of different density. However, when either the seed distribution or density differed from actual values, all three species had identical optima. The implications of these results for promoting coexistence are discussed.


1988 ◽  
Vol 27 (Part 2, No. 3) ◽  
pp. L444-L447 ◽  
Author(s):  
Yoshihide Kimura ◽  
Hee Jae Kang ◽  
Ryuichi Shimizu

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