Numerical modeling and dynamic simulation of automotive power window system with a single regulator

2017 ◽  
Vol 18 (5) ◽  
pp. 833-849
Author(s):  
Choong-Ryung Lee ◽  
Hyun-Yong Jeong
Keyword(s):  
Numerical Modeling ◽  
Dynamic Simulation ◽  
Window System

scholarly journals Comparison of the Spreading Characters of Fire Products in the Typical Metro Stations of Washington, D.C., and Guangzhou

2021 ◽  
Author(s):  
Heng Yu
Keyword(s):  
Numerical Modeling ◽  
Temperature Distribution ◽  
Dynamic Simulation ◽  
Release Rate ◽  
Construction Cost ◽  
Temperature Increment ◽  
Dome Structure ◽  
Height Change ◽  
Evacuation Safety ◽  
Fire Location

AbstractFire is one of the most common disasters that threaten the safety of the crowd in metro stations. Due to the variations in the design of metro stations, the hazard posed by the spreading products of the fire can pose different risks. The typical structures of metro stations in Guangzhou and Washington, D.C., are very different from each other. In Washington, D.C., the “high-dome” structure is predominant in the construction of metro stations, while in Guangzhou, most metro stations have the “flat ceiling” structure. In this article, a numerical modeling for fire dynamic simulation is used to predict and compare the spreading characters of fire products (the smoke height change, the temperature distribution and the visibility change) when fires with 2.5 MW heat release rate occur in the platform center and at the platform end in the two kinds of metro stations. The results show that, in the same fire scenario, the lowest smoke heights monitored in the Guangzhou model is 0.6 m (fire at the platform end) and 0.8 m (fire in the platform center) above the safe smoke height in 360 s after a fire breaks out, while it is 6.15 m (fire in the platform center) and 6.2 m (fire at the platform end) above the smoke height in the Washington model. The temperature increment in the Guangzhou model is 23 °C (fire in the platform center) to 29 °C (fire at the platform end) in 360 s after the fire breaks out, while the temperature increment in the same period in the Washington model is 8.5 °C (fire at the platform end) to 9 °C (fire in the platform center). The visibility of most areas on the platform of the Guangzhou model is about 1 m no matter the fire is in the platform center or at the platform end at 360 s after the fire begins, while in the Washington model, the visibility of most areas is 1.5–13.5 mm (fire at the platform end) to 4–14 m (fire in the platform center) at the same moment. Based on the results, the environment is worse when the fire happens at the end of the platform than that when the fire happens in the platform center of the Guangzhou model. While the fire location has fewer impacts on the smoke height, temperature, and visibility in the Washington model, metro stations with a high-dome structure can be beneficial to fire evacuation safety; however, the construction cost can be high. Metro stations with flat ceiling are widely used in more cities for it has lower construction cost; to compensate for its weaker abilities under fire conditions, it is suggested that smoke exhaust systems should be carefully and fully considered.

Study on One Kind of Antenna Radomes Materials Numerical Algorithm Simulation Based on DBEM

2008 ◽  
Vol 575-578 ◽  
pp. 1471-1476
Author(s):  
Ying Wu Fang ◽  
Yi Wang
Keyword(s):  
Numerical Simulation ◽  
Numerical Modeling ◽  
Boundary Element Method ◽  
Dynamic Simulation ◽  
Reference Value ◽  
Simulation Algorithm ◽  
Simulation Accuracy ◽  
Dynamic Behaviors ◽  
Simulation Based ◽  
Numerical Modeling And Simulation

An approach of numerical modeling and simulation algorithm is presented to predict dynamic behaviors of one kind of antenna radomes materials efficiently. Considering the dynamic behaviors in the lateral and interior of the antenna radomes materials, the dynamic simulation equations of the antenna radomes materials is established based on a dynamic boundary element method (DBEM) by using the domain reducing to decrease computational scale and costs of the equations greatly, and the dynamic behaviors of the antenna radomes materials can be gotten effectively. Numerical simulation calculating and experiments show that the presented method not only saves computational efforts, raises analytical efficiency and simulation accuracy but also can provide the theoretical bases for avoiding the weak pose of the antenna radomes materials. It has very important reference value for improving theoretical calculation and design level of the antenna radomes materials.

Investigation of Morphosedimentary Processes on a Schematic Louisiana Barrier Island Using Process-Based Numerical Modeling

2007 ◽  
Author(s):  
T. Campbell ◽  
B. de Sonneville ◽  
L. Benedet ◽  
D. J. W. Walstra ◽  
C. W. Finkl
Keyword(s):  
Numerical Modeling ◽  
Barrier Island
Sign in / Sign up

Export Citation Format

Share Document