scholarly journals Multiobjective optimization of internal and surface structure of high-speed and heavy-duty brake disc

2022 ◽  
Vol 14 (1) ◽  
pp. 168781402110704
Author(s):  
Jian Yin ◽  
Qiang Hao ◽  
Yu Liu ◽  
Shengfang Zhang ◽  
Zhihua Sha
Keyword(s):  
Topology Optimization ◽  
Surface Structure ◽  
High Speed ◽  
Moving Load ◽  
Frictional Resistance ◽  
Optimization Method ◽  
Surface Structures ◽  
Brake Disc ◽  
Heavy Duty ◽  
Topography Optimization

The brake disc plays a crucial role to keep the stable braking of a high-speed and heavy-duty disc brake. There is always high temperature, brake vibration, and even serious deformation under braking pressure and frictional resistance. To improve brake performance, this paper aims to find new internal and surface structures of the brake disc. An equivalent moving load (EML) topology optimization method for internal structure is proposed. Topography optimization method oriented to displacement and stress control for surface structure is carried out. Multiobjective functions containing thermal-structural coupled rigidity and natural frequency of the brake disc are established in the internal and surface structure optimizations. Internal and surface structures of the brake disc are optimized, and the mechanic properties of the brake disc are improved. Thermal-structural coupling and modal analyses are verified with high-speed and heavy-duty brake working conditions. The results show that new brake disc structures meet the requirements, and the effectiveness of the proposed EML topology optimization and topography optimization methods has been proved.

Study on Lightweight of the Engine Piston Based on Topology Optimization

2011 ◽  
Vol 201-203 ◽  
pp. 1308-1311 ◽  
Author(s):  
Fa Rong Du ◽  
Zhi Tao
Keyword(s):  
Topology Optimization ◽  
High Speed ◽  
Gasoline Engine ◽  
Optimization Method ◽  
Variable Density ◽  
Complex Stress ◽  
Density Topology ◽  
Before And After ◽  
Calculation Results ◽  
Hyper Works

The topology optimization and analysis were studied on the area of piston pin boss for a high-speed gasoline engine based on the variable density topology optimization method. Firstly, the model of the variable density topology optimization was founded. Then, the topology optimization and topology deconstruction on the piston pin boss were carried out by using Hyper Works. In this process, the minimum mass of piston was pursued as an objective function and the displacements of specified nodes on the piston skirt were made as constraints. Based on the topology optimization, the piston configuration of curved rod frame was designed. The complex stress of the piston before and after optimization was calculated respectively by ANSYS. The calculation results indicate that the piston mass can be lightened by 30% through optimizing under the same level of maximal stress, with satisfying the strength requirements. Therefore, the aim of piston lightweight is achieved, and there is no stress concentration in the area of the optimizing piston pin boss, which is propitious to the deformation compatibility of the piston pin boss.

Topology Optimization of Thin-Shell Frame with Surface Loads

2013 ◽  
Vol 483 ◽  
pp. 484-488
Author(s):  
Yong Guo Ke ◽  
Li Ma ◽  
Yuan Yuan Du
Keyword(s):  
Topology Optimization ◽  
Thin Shell ◽  
Lightweight Design ◽  
Mathematic Model ◽  
Optimization Method ◽  
Dump Truck ◽  
Heavy Duty ◽  
Shaped Container ◽  
Surface Loads ◽  
Topology Optimization Method

A topology optimization method of thin-shell frame with surface loads is proposed in this paper and the mathematic model of this topology optimization method is introduced. Based on this proposed method, the procedure of lightweight design for special-shaped container is introduced, then, the lightweight design of 30t special-shaped container of heavy-duty dump truck is carried out. The result shows that the proposed method is very practicable and effective.

Topology Optimization and Robust Analysis of Welding Spot Layout for a Heavy Duty Truck Cab Based on Element Strain Energy Density

2014 ◽  
Vol 887-888 ◽  
pp. 1284-1289 ◽  
Author(s):  
An Cui ◽  
Shi Zhan Zhang ◽  
Li Juan Xu ◽  
Hui Zi Liu
Keyword(s):  
Topology Optimization ◽  
Energy Density ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Element Model ◽  
Optimization Method ◽  
Heavy Duty ◽  
Static Stiffness ◽  
Heavy Duty Truck ◽  
Welding Spot

The static stiffness and numerical modal are analyzed with the finite element model of a heavy duty truck cab. Considering the influence of welding spots on static stiffness, strength and first order modal frequency, the welding spots of the heavy duty truck cab are divided into two areas based on element strain energy density. And welding spot layout of the two areas is optimized by topology optimization method respectively. Then the robustness of welding spot layout before and after optimization is analyzed. The results show that the number of welding spots after optimization is reduced with the performance maintained and welding spot layout robustness of the cab is improved.

High Speed Information Network Planning using Stochastic Optimization Method

2013 ◽  
Author(s):  
Ki-Sang Song ◽  
Arun K. Somani
Keyword(s):  
Stochastic Optimization ◽  
Network Design ◽  
Multimedia Information ◽  
High Speed ◽  
Minimum Cost ◽  
Optimization Method ◽  
Multimedia Communication ◽  
Network Design Problem ◽  
Information Network ◽  
Traffic Characteristics

From the 1994 CAIS Conference: The Information Industry in Transition McGill University, Montreal, Quebec. May 25 - 27, 1994.Broadband integrated services digital network (B-ISDN) based on the asynchronous transmission mode (ATM) is becoming reality to provide high speed, multi bit rate multimedia communications. Multimedia communication network has to support voice, video and data traffics that have different traffic characteristics, delay sensitive or loss sensitive features have to be accounted for designing high speed multimedia information networks. In this paper, we formulate the network design problem by considering the multimedia communication requirements. A high speed multimedia information network design alogrithm is developed using a stochastic optimization method to find good solutions which meet the Quality of Service (QoS) requirement of each traffic class with minimum cost.

ELECTRITE COBALT

Alloy Digest ◽  
1960 ◽  
Vol 9 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
High Speed ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Heat Treating ◽  
Heavy Duty ◽  
Steel Company

Abstract ELECTRITE COBALT is a 5% cobalt type high-speed steel recommended for heavy duty cutting tools. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-89. Producer or source: Latrobe Steel Company.

CYCLOPS M4

Alloy Digest ◽  
1978 ◽  
Vol 27 (7) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
High Speed ◽  
Heat Treating ◽  
Heavy Duty ◽  
Maximum Hardness ◽  
Temperature Performance ◽  
Sharp Edges ◽  
Normal Carbon

Abstract CYCLOPS M4 is a deep-hardening steel that was developed to utilize the excellent abrasion resistance that results from higher-than-normal carbon and vanadium contents in the molybdenum-tungsten family of high-speed steels. It is recommended for heavy-duty cutting operations and for sharp edges for fine cuts. Cyclops M4 should always be used at or near maximum hardness. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-335. Producer or source: Cyclops Corporation.

Tribological and dynamical analysis of a brake pad with multiple blocks for a high-speed train

2019 ◽  
Vol 234 (11) ◽  
pp. 1771-1788
Author(s):  
YK Wu ◽  
JL Mo ◽  
B Tang ◽  
JW Xu ◽  
B Huang ◽  
...  
Keyword(s):  
High Speed ◽  
Wear Behavior ◽  
Dynamical Analysis ◽  
Brake Disc ◽  
Brake Pad ◽  
High Speed Train ◽  
Brake Squeal ◽  
Element Analysis ◽  
Single Block ◽  
Middle Ring

In this research, the tribological and dynamical characteristics of a brake pad with multiple blocks are investigated using experimental and numerical methods. A dynamometer with a multiblock brake pad configuration on a brake disc is developed and a series of drag-type tests are conducted to study the brake squeal and wear behavior of a high-speed train brake system. Finite element analysis is performed to derive physical explanations for the observed experimental phenomena. The experimental and numerical results show that the rotational speed and braking force have important influences on the brake squeal; the trends of the multiblock and single-block systems are different. In the multiblock brake pad, the different blocks exhibit significantly different magnitudes of contact stresses and vibration accelerations. The blocks located in the inner and outer rings have higher vibration acceleration amplitudes and stronger vibration energies than the blocks located in the middle ring.

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