Topology and modular size optimization of small electric vehicle frame based on cross-section contribution analysis

2021 ◽  
Author(s):  
Jielin Chen ◽  
Yein Kwak ◽  
Moran Xu ◽  
Rendi Kurniawan ◽  
Changping Li ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Cross Section ◽  
Size Optimization ◽  
Contribution Analysis

Size Optimization of a Weight-Balanced Haptic Device

2014 ◽  
Vol 945-949 ◽  
pp. 1417-1420
Author(s):  
Xi Ye Niu ◽  
Chen Zhao ◽  
Hua Wang
Keyword(s):  
Cross Section ◽  
Haptic Device ◽  
Simplified Model ◽  
Size Optimization ◽  
Apparent Mass ◽  
Mechanical Parts ◽  
Circular Tubes ◽  
Optimization Result ◽  
Factors Influencing ◽  
Design Requirements

A size optimization is performed to a weight-balanced haptic device. Firstly design requirements for mechanical parts of haptic devices are summarized. After analyzing factors influencing force-reflecting accuracy, a basic idea is got that the device should be weight-balanced and should have minimum apparent mass while keeping certain stiffness. Then a simplified model is got for the prototype and apparent mass and stiffness is analyzed and expressed in terms of variables based on the simplified model. With link cross section set to be circular tubes, an optimization is done to find link diameters and wall thicknesses with lowest apparent mass and given stiffness. At last the optimization result is analyzed and the model is proved to be reasonable.

scholarly journals Size optimization of rectangular cross section members subject to fatigue constraints

2017 ◽  
pp. 547
Author(s):  
Juan Manuel González Mendoza ◽  
Samuel Alcántara Montes ◽  
José De Jesús Silva Lomelí ◽  
Juan Alejandro Flores Campos
Keyword(s):  
Cross Section ◽  
Rectangular Cross Section ◽  
Size Optimization ◽  
Fatigue Constraints

A Lightweight Body Frame Conceptual Design of a Mini Electric Vehicle

2014 ◽  
Vol 952 ◽  
pp. 223-226 ◽  
Author(s):  
Da Feng Jin ◽  
Xiao Qi Chen
Keyword(s):  
Topology Optimization ◽  
Electric Vehicle ◽  
Conceptual Design ◽  
Size Optimization ◽  
Static Stiffness ◽  
Body Frame ◽  
Load Paths ◽  
Design Variables ◽  
Lightweight Structure ◽  
Continuous And Discrete Variables

To realize the lightweight structure, a car body frame conceptual design of a mini electric vehicle was performed with topology optimization and size optimization. Topology optimization was used to search load paths and size optimization was applied to model a simplified structure. Static stiffness, crash safety and free vibration conditions were considered simultaneously in both of the optimization phases. Due to the feature of conceptual design, crashworthiness cases were regarded as static stiffness ones with inertia relief analysis for a linear equivalent. The objective function in multi-objective topology optimization was defined by Compromise Programming Method in OptiStruct. Because of the characteristic of the geometry and the manufacturing constraints of profiles, the design variables in size optimization were defined as both continuous and discrete variables. The resultant structure outperforms the original one in many structure responses and most significantly, it reduces weight by 36%, which demonstrates the efficiency of the proposed method.

Electric Vehicle Interior Noise Contribution Analysis

2016 ◽  
Author(s):  
Yuntao Cao ◽  
Dengfeng Wang ◽  
Tonghang Zhao ◽  
Xining Liu ◽  
Chao Li ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Interior Noise ◽  
Vehicle Interior ◽  
Vehicle Interior Noise ◽  
Contribution Analysis ◽  
Noise Contribution

XUV Absorption Spectra of Carbon Ions

1988 ◽  
Vol 102 ◽  
pp. 71-73
Author(s):  
E. Jannitti ◽  
P. Nicolosi ◽  
G. Tondello
Keyword(s):  
Absorption Spectra ◽  
Cross Section ◽  
Theoretical Calculations ◽  
Photoionization Cross Section ◽  
Carbon Ions

AbstractThe photoabsorption spectra of the carbon ions have been obtained by using two laser-produced plasmas. The photoionization cross-section of the CV has been absolutely measured and the value at threshold, σ=(4.7±0.5) × 10−19cm2, as well as its behaviour at higher energies agrees quite well with the theoretical calculations.

Elastic Scattering in Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 252-253
Author(s):  
J. Langmore ◽  
M. Isaacson ◽  
J. Wall ◽  
A. V. Crewe
Keyword(s):  
Electron Microscopy ◽  
Elastic Scattering ◽  
Cross Section ◽  
Quantum Noise ◽  
Dark Field ◽  
Elastic Cross Section ◽  
Biological Molecules ◽  
Dark Field Microscopy ◽  
Field Systems ◽  
Effects Of Radiation

High resolution dark field microscopy is becoming an important tool for the investigation of unstained and specifically stained biological molecules. Of primary consideration to the microscopist is the interpretation of image Intensities and the effects of radiation damage to the specimen. Ignoring inelastic scattering, the image intensity is directly related to the collected elastic scattering cross section, σɳ, which is the product of the total elastic cross section, σ and the eficiency of the microscope system at imaging these electrons, η. The number of potentially bond damaging events resulting from the beam exposure required to reduce the effect of quantum noise in the image to a given level is proportional to 1/η. We wish to compare η in three dark field systems.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

Electron Irradiation Effects in Polyoxymethylene Crystals Grown Inside Trioxane Crystals

1971 ◽  
Vol 29 ◽  
pp. 78-79
Author(s):  
J. P. Colson ◽  
D. H. Reneker
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Detailed Examination ◽  
The Other ◽  
Electron Micrograph ◽  
Irradiation Effects ◽  
Threefold Axis ◽  
Typical Sample ◽  
Polymer Crystals ◽  
Chain Axis

Polyoxymethylene (POM) crystals grow inside trioxane crystals which have been irradiated and heated to a temperature slightly below their melting point. Figure 1 shows a low magnification electron micrograph of a group of such POM crystals. Detailed examination at higher magnification showed that three distinct types of POM crystals grew in a typical sample. The three types of POM crystals were distinguished by the direction that the polymer chain axis in each crystal made with respect to the threefold axis of the trioxane crystal. These polyoxymethylene crystals were described previously.At low magnifications the three types of polymer crystals appeared as slender rods. One type had a hexagonal cross section and the other two types had rectangular cross sections, that is, they were ribbonlike.

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