The Structure Design and Exhaust Mechanism on Hybrid Supercharger

2013 ◽  
Vol 419 ◽  
pp. 209-216
Author(s):  
Hua Pan Xiao ◽  
Zi Fan Fang ◽  
Jing Fang ◽  
Hui Li ◽  
Kong De He ◽  
...  
Keyword(s):  
Design Theory ◽  
Optimization Design ◽  
Research Result ◽  
Branch Pipe ◽  
Flow Distribution ◽  
Structure Design ◽  
Exhaust Pipe ◽  
Pressure Pipe ◽  
Connection Type ◽  
Parameter Optimization Design

Aiming at solving the problem of underwater exhaust for underwater vehicle, a new underwater exhaust scheme is presented with structure and power supercharger, which the structure design is analyzed and studied. Firstly, the fluid characteristic is analyzed in junction between the exhaust pipe of diesel and the pressure pipe of air compressor. The connection type of them is presented and the exhaust mechanism is proved that low pressure gas can exhaust out from exhaust pipe by entrainment. Subsequently, based on the Bernoulli principle, the flow distribution is analyzed in the branch pipe. Finally, taking exhaust performance as optimum target, the parameter optimization design is carried out for branch pipe by using DOE; the optimal structure size is also obtained for exhaust pipe by regression analysis. The research result predicts that a new underwater exhaust scheme and its design theory are presented in this paper.

The Calculation of the Supporting Stress of Track Plate in Ballastless High-Speed Rail Structure

2011 ◽  
Vol 97-98 ◽  
pp. 3-9
Author(s):  
Yang Wang ◽  
Quan Mei Gong ◽  
Mei Fang Li
Keyword(s):  
Stress Distribution ◽  
High Speed ◽  
Design Theory ◽  
Moving Load ◽  
Structure Design ◽  
Track Structure ◽  
Beam Model ◽  
High Speed Rail ◽  
Slab Track ◽  
Ballastless Track

The slab track is a new sort of track structure, which has been widely used in high-speed rail and special line for passenger. However, the ballastless track structure design theory is still not perfect and can not meet the requirements of current high-speed rail and passenger line ballastless track. In this paper, composite beam method is used to calculate the deflection of the track plate and in this way the vertical supporting stress distribution of the track plate can be gotten which set a basis for the follow-up study of the dynamic stress distribution in the subgrade. Slab track plate’s bearing stress under moving load is analyzed through Matlab program. By calculation and analysis, it is found that the deflection of track plate and the rail in the double-point-supported finite beam model refers to the rate of spring coefficient of the fastener and the mortar.The supporting stress of the rail plate is inversely proportional to the supporting stress of the rail. The two boundary conditions of that model ,namely, setting the end of the model in the seams of the track plate or not , have little effect on the results. We can use the supporting stress of the track plates on state 1to get the distribution of the supporting stress in the track plate when bogies pass. Also, when the dynamic load magnification factor is 1.2, the track plate supporting stress of CRST I & CRST II-plate non-ballasted structure is around 40kPa.

Experimental Study of Urea Depositions in Urea-SCR System

2014 ◽  
Vol 937 ◽  
pp. 74-79 ◽  
Author(s):  
Shu Zhan Bai ◽  
Shuai Guo Lang ◽  
Ke Ping Yuan ◽  
Yang Liu ◽  
Guo Xiang Li
Keyword(s):  
Control Strategy ◽  
Structural Design ◽  
Cyanuric Acid ◽  
Exhaust System ◽  
Structure Design ◽  
Exhaust Pipe ◽  
Front End ◽  
Urea Crystallization ◽  
Exhaust Stream ◽  
Scr System

Avoiding the urea deposition in the exhaust stream is one of the basic requirements for SCR system normal application. Unreasonable structure design, machining and installation position all could lead to urea crystallization on the wall of exhaust pipe and the front end surface of the catalyst, in addition, unreasonable control strategy also could deteriorate this phenomenon. The components of the urea depositions are the urea and cyanuric acid analyzed by thermogravimetry - FTIR technology. The integrated injector mounting is designed to alleviate the urea crystallization based on analysis results. The engine test and the vehicle road test are all shown that the optimal structural design and calibration strategies could avoid crystallization and sedimentation effectively in the exhaust system.

Mechanical Study of Carbon Fiber Reinforced Plastic and Thin-walled Metal Liner in Bi-Material COPV Based on Grid Theory Optimization

2021 ◽  
Vol 1027 ◽  
pp. 15-21
Author(s):  
Bin Yu ◽  
Jian Jun Zhang ◽  
Ji Peng Zhao ◽  
Tian Ju Ma
Keyword(s):  
Carbon Fiber ◽  
Design Theory ◽  
Structure Design ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Stress Strain ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced ◽  
Metal Liner

Composite over-wrapped pressure vessel (COPV) with ultra-thin metal liner and high strength carbon fiber reinforced plastic (CFRP) structure was widely used in space system. Meanwhile, there are some difficulties in the calculation of COPV stress-strain state related to the elastic-plastic liner and elastic composite. In this paper a novel design theory was proposed for calculating stress distribution in the bi-material COPV and determining the optimal thickness parameters of COPV based on traditional grid theory optimization. This new theory named Parameters Correspondence Relationship Structure Design Method (PCRSDM) can increase the design precision and structure performance factor of COPV compared to traditional grid theory. The correct models of mechanical characteristic between liner and CFRP are established from the view of optimized grid theory, the present theory is useful to develop a theoretical framework to calculate and design the COPV double shells. The COPV stress-strain behavior is also systemically studied by the ANSYS finite element analysis (FEA), the results show good agreement between FEA simulation and PCRSDM calculation. Both FEA and PCRSDM can meet the design requirements of COPV. A complete design, development and qualification testing of a specialized COPV used to satellite propulsion system was successfully conducted to verify the COPV design in terms of PCRSDM and FEA, the result show that PCRSDM is suitable for the design of COPV.

Energy-Saving Optimization Design Frame System Using Energy Footprint Graphical Model

2016 ◽  
Vol 693 ◽  
pp. 1971-1974
Author(s):  
Ying Tian ◽  
Lei Zhang ◽  
Tai Yong Wang ◽  
Song Ling Tian ◽  
Peng Lin Li
Keyword(s):  
Optimization Design ◽  
Graphical Model ◽  
Structure Design ◽  
Product Families ◽  
Component Structure ◽  
Flow Maps ◽  
Analysis Methodology ◽  
Industrial Distribution ◽  
Energy Footprint ◽  
Frame System

Product’s performance should be sustainable the environment, which is accepted and be accomplished by more and more companies and people. While some of these methods used well in some special fields may damage the environment in the other period of product related lifecycle phrase. This paper propose an integrated solving environmental analysis methodology based on the unified energy footprint graphic model, which can systematic describe all the produce activities impacted with the external environment by tracing the energy footprint in the uniformed energy flow maps. This frame system can also be divided into three ranks, which can be used clearly to deal with the energy-related environmental problem from the product component structure design to the manufactory processes optimization even to the product families’ research and industrial distribution as a whole.

scholarly journals Lightweight Design of Front Suspension Upright of Electric Formula Car Based on Topology Optimization Method

2020 ◽  
Vol 11 (1) ◽  
pp. 15 ◽  
Author(s):  
Jixiong Li ◽  
Jianliang Tan ◽  
Jianbin Dong
Keyword(s):  
Topology Optimization ◽  
Optimization Design ◽  
Lightweight Design ◽  
Geometric Model ◽  
Load Condition ◽  
Optimization Method ◽  
Structure Design ◽  
Front Suspension ◽  
Emergency Braking ◽  
Topology Optimization Method

In order to obtain a lightweight front upright of an electric formula car’s suspension, the topology optimization method is used in the front upright structure design. The mathematical model of the lightweight optimization design is constructed, and the geometric model of the initial design of the front upright is subjected to the ultimate load condition. The structural optimization of a front upright resulted in the mass reduction of the upright by 60.43%. The optimized model was simulated and verified regarding the strength, stiffness, and safety factor under three different conditions, namely turning braking, emergency braking, and sharp turning. In the experiment, the uprights were machined and assembled and integrated into the racing suspension. The experimental results showed that the optimized front uprights met the requirements of performance.

scholarly journals Multiobjective Optimization Design for Structural Parameters of TBM Disc Cutter Rings Based on FAHP and SAMPGA

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Laikuang Lin ◽  
Yimin Xia ◽  
Dun Wu
Keyword(s):  
Multiobjective Optimization ◽  
Optimization Design ◽  
Structural Parameters ◽  
Rock Breaking ◽  
Ring Structure ◽  
Structure Design ◽  
Disc Cutter ◽  
Load Bearing ◽  
Geological Conditions ◽  
Weight Coefficients

As a key component of tunnel boring machines (TBMs), the disc cutter ring and its structural parameters are closely related to the TBM tunneling quality. Literature review shows that investigations on optimization design methods for cutter ring structure are seriously insufficient. Therefore, in this paper, a multiobjective optimization design model of structural parameters for disc cutter rings is developed based on the complex geological conditions and the corresponding cutter ring structure design requirements. The rock breaking capability, energy consumption, load-bearing capability, wear life, and wear uniformity of disc cutter are selected as the objectives, and the geometric structure of cutter rings, ultimate load-bearing capability, and cutterhead drive performance are determined as constraints. According to the characteristics of this model, a self-adaptive multipopulation genetic algorithm (SAMPGA) is utilized to solve the optimization problem, and the Fuzzy analytical hierarchy process (FAHP) is employed to calculate weight coefficients for multiple objectives. Finally, the applicability of the proposed method is demonstrated through a case study in a TBM project. The results indicated that the rock breaking performance and service life of the disc cutter are improved after optimization by using the proposed method. The utilization of SAMPGA effectively solves the premature local convergence problems during optimization. The geological adaptability should be considered in the cutter ring structure design, which can be realized by using the proposed method based on the suitable weight coefficients.

The Research and Application on Optimization Design of Lifting Mechanism - The Hydraulic Cylinder Structure Design

2014 ◽  
Vol 945-949 ◽  
pp. 503-508
Author(s):  
Li Xie ◽  
Qi Sun
Keyword(s):  
Optimization Design ◽  
Lower Cost ◽  
Hydraulic Cylinder ◽  
Structure Design ◽  
Optimal Parameters ◽  
Modern Computer ◽  
Optimal Value ◽  
Design Cycle ◽  
General Mechanic ◽  
Modern Computer Technology

As general mechanic designing methods take long design cycle and consume many resources, though it could find a good design, it could not get the optimal one.Optimization design is the fruit of the combination of optimization mathematical method and modern computer technology, which enables to get the optimal parameters under various constrains, so that the optimal value could be achieved. Optimization design is a method to ensure better usability, lower cost and reducing weight and volume when normally use it. This method can also shorten the design cycle and enhance the design efficiency.

The Structure Optimization of Aluminum Alloy Automotive Wheels

2013 ◽  
Vol 753-755 ◽  
pp. 1175-1179
Author(s):  
Bao An Yang ◽  
Xu Hui Li ◽  
Fei Yang ◽  
Zi Ru Niu ◽  
Zhi Hong Wang
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Test ◽  
Optimization Design ◽  
Structure Optimization ◽  
Scientific Basis ◽  
Structure Design ◽  
Bending Fatigue ◽  
Structure Characteristics ◽  
Bending Fatigue Test

The aluminum alloy automotive wheels are widely used and their quality safety is vital. So their structure design should be optimized. Based on the wheel bending fatigue test and the analysis of aluminum alloy automotive wheel's structure characteristics, the wheel's load was discussed and the analysis of the wheel was done by using Solidworks and ANSYS. The analysis result provides scientific basis for the optimization design of the aluminum alloy automotive wheels.

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