scholarly journals Development of Optimal Design Simulation Model for Least Cost Urban Sewer System Considering Risk (II)

2005 ◽  
Vol 38 (12) ◽  
pp. 1029-1037 ◽  
Author(s):  
Sang-Woo Park ◽  
Suk-Hwan Jang
Keyword(s):  
Optimal Design ◽  
Simulation Model ◽  
Sewer System

Optimal Design for Storm Sewer System with Pumping Stations

1991 ◽  
Vol 117 (1) ◽  
pp. 11-27 ◽  
Author(s):  
Jan‐Tai Kuo ◽  
Ben Chie Yen ◽  
Gie‐Ping Hwang
Keyword(s):  
Optimal Design ◽  
Sewer System ◽  
Pumping Stations ◽  
Storm Sewer

Optimal design activated sludge process by means of multi-objective optimization: case study in Benchmark Simulation Model 1 (BSM1)

2014 ◽  
Vol 69 (10) ◽  
pp. 2052-2058 ◽  
Author(s):  
Wenliang Chen ◽  
Chonghua Yao ◽  
Xiwu Lu
Keyword(s):  
Optimal Design ◽  
Activated Sludge ◽  
Simulation Model ◽  
Process Parameters ◽  
Activated Sludge Process ◽  
Multi Objective Optimization ◽  
Cost Index ◽  
Multi Objective ◽  
Performance Indexes ◽  
N Removal

Optimal design of activated sludge process (ASP) using multi-objective optimization was studied, and a benchmark process in Benchmark Simulation Model 1 (BSM1) was taken as a target process. The objectives of the study were to achieve four indexes of percentage of effluent violation (PEV), overall cost index (OCI), total volume and total suspended solids, making up four cases for comparative analysis. Models were solved by the non-dominated sorting genetic algorithm in MATLAB. Results show that: ineffective solutions can be rejected by adding constraints, and newly added objectives can affect the relationship between the existing objectives; taking Pareto solutions as process parameters, the performance indexes of PEV and OCI can be improved more than with the default process parameters of BSM1, especially for N removal and resistance against dynamic NH4+-N in influent. The results indicate that multi-objective optimization is a useful method for optimal design ASP.

SIPSON – Simulation of Interaction between Pipe flow and Surface Overland flow in Networks

2005 ◽  
Vol 52 (5) ◽  
pp. 275-283 ◽  
Author(s):  
S. Djordjević ◽  
D. Prodanović ◽  
Č. Maksimović ◽  
M. Ivetić ◽  
D. Savić
Keyword(s):  
Simulation Model ◽  
Pipe Flow ◽  
Overland Flow ◽  
Field Measurements ◽  
Internal Boundary ◽  
Sewer System ◽  
Buried Structures ◽  
Runoff Hydrographs ◽  
The Mathematical Model ◽  
Looped Network

The new simulation model, named SIPSON, based on the Preissmann finite difference method and the conjugate gradient method, is presented in the paper. This model simulates conditions when the hydraulic capacity of a sewer system is exceeded, pipe flow is pressurized, the water flows out from the piped system to the streets, and the inlets cannot capture all the runoff. In the mathematical model, buried structures and pipelines, together with surface channels, make a horizontally and vertically looped network involving a complex interaction of flows. In this paper, special internal boundary conditions related to equivalent inlets are discussed. Procedures are described for the simulation of manhole cover loss, basement flooding, the representation of street geometry, and the distribution of runoff hydrographs between surface and underground networks. All these procedures are built into the simulation model. Relevant issues are illustrated on a set of examples, focusing on specific parameters and comparison with field measurements of flooding of the Motilal ki Chal catchment (Indore, India). Satisfactory agreement of observed and simulated hydrographs and maximum surface flooding levels is obtained. It is concluded that the presented approach is an improvement compared to the standard “virtual reservoir” approach commonly applied in most of the models.

Simulation about Sports Bicycle Frame Based on the Experiments

2010 ◽  
Vol 37-38 ◽  
pp. 1142-1147 ◽  
Author(s):  
Jian Hua Wang ◽  
Jing Nan Zhao ◽  
Yong Sheng Zhao ◽  
Zhe Wang ◽  
Dong Liang Guo
Keyword(s):  
Optimal Design ◽  
Simulation Model ◽  
Static Analysis ◽  
Static Tests ◽  
Bicycle Frame ◽  
Development Processes ◽  
Test Result ◽  
Ansys Workbench

To verify the existing sports bicycle frames design and to achieve the fast and accurate self-design of frames, a simulation model of the frames is established during three development processes. First, the modal and static tests were designed for the study of a particular sports bicycle frame. Second, the initial simulation model of the frame was developed with Pro/Engineer and ANSYS Workbench software, and the simulation model was used to conduct the modal and static analysis on the frame. Finally, based on the comparison of the analysis and test result, the parameters of the simulation model were modified. The results show that the simulation model is consistent with the test result and it can be used for the optimal design of sports bicycle frame.

scholarly journals Study on Optimal Design Based on Direct Coupling Between a FEM Simulation Model and L-BFGS-B Algorithm

2013 ◽  
Vol 49 (5) ◽  
pp. 2149-2152 ◽  
Author(s):  
M. S. Berkani ◽  
S. Giurgea ◽  
C. Espanet ◽  
J. L. Coulomb ◽  
C. Kieffer
Keyword(s):  
Optimal Design ◽  
Simulation Model ◽  
Fem Simulation ◽  
Direct Coupling

Design and Analysis of Hydro-Viscous Winch Hydraulic System

2012 ◽  
Vol 605-607 ◽  
pp. 1317-1321
Author(s):  
Qing Rui Meng ◽  
Shang Fei Lin ◽  
Jian Wang
Keyword(s):  
Optimal Design ◽  
Simulation Model ◽  
Flow Rate ◽  
Theoretical Basis ◽  
Hydraulic System ◽  
Lubricating Oil ◽  
Orifice Diameter ◽  
Disc Brake ◽  
System Pressure ◽  
Oil Flow

A hydro-viscous winch comprises a disc brake and a hydro-viscous brake. The hydraulic system is of utmost importance to the performance of the winch. To verify the validity of the hydraulic system, by using AMESim software, the simulation model of the hydraulic system was built and the performance analyzed. The results show that 1) the pressure and the flow rate of the disc brake hydraulic system are mainly affected by the energy accumulator; 2) Hydro-viscous brake hydraulic system pressure and lubricating oil flow rate are influenced by orifice diameter of the throttle valve; 3) during the braking period, the amplitude of the deceleration is rather small and the hydro-viscous winch hydraulic system can meet the requirements well. Research achievements of this work provides theoretical basis for optimal design of the hydro-viscous winch hydraulic system.

Study on Optimal Design of Case Ejector Mechanism of Tank Autoloader Based on Kinematical Simulation

2013 ◽  
Vol 312 ◽  
pp. 191-195
Author(s):  
Ya Ning Chen
Keyword(s):  
Optimal Design ◽  
Simulation Model ◽  
Computer Technology ◽  
Transmission Factor ◽  
Modern Computer ◽  
Linkage Design ◽  
Novel Method ◽  
The Given ◽  
Modern Computer Technology ◽  
Kinematical Simulation

To make optimal design of case ejector mechanism easier and more efficiency, a novel method based on kinematical simulation and combining modern computer technology with the features of traditional linkage design is presented. By analyzing transmission state of double-rocker mechanism of ejector, establishing a kinematical simulation model and determining the appropriate data of the mechanism, a designer could easily design a case ejector satisfying all the requirements on movement or trajectory in the given conditions. Meanwhile, the transmission factor of the mechanism is highly increased. The results from optimal design of the case ejector of certain type of tank show that the transmission factor of the mechanism is increased by 58.4%.

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