Belt Construction Optimization for Tire Weight Reduction Using the Finite Element Method

1993 ◽  
Vol 21 (2) ◽  
pp. 120-134 ◽  
Author(s):  
M. Weiss ◽  
S. Tsujimoto ◽  
H. Yoshinaga
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Weight Reduction ◽  
High Speed ◽  
High Performance ◽  
Ride Comfort ◽  
Rolling Resistance ◽  
The Finite Element Method ◽  
Belt Width ◽  
Element Method

Abstract The influence of five belt constructions on high speed endurance, ride comfort, and rolling resistance was investigated for a high performance 225/50R16 92V radial passenger car tire, using the finite element method. The belt constructions were combinations of belt edge shapes (cut, folded) and reinforcement materials (steel, aramid). The goal was to find optimized belt constructions for tire weight reduction, considering important tire properties like high speed endurance, ride comfort, and rolling resistance. A full aramid belt construction with a folded belt around a cut belt was chosen for design parameter variation calculations to reduce rolling resistance. This leads to a tire with smaller belt width, increased folding width, additional center cap ply, and reduced non-skid base and depth. The effect of inflation pressure and speed on rolling resistance was evaluated for this construction.

scholarly journals Design and Structural Analysis of a SWATH type vessel using the Finite Element Method and its response to Slamming events

2020 ◽  
Vol 14 (27) ◽  
pp. 55-66
Author(s):  
Hugo Leonardo Murcia Gallo ◽  
Richard Lionel Luco Salman ◽  
David Ignacio Fuentes Montaña
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Speed ◽  
Load Condition ◽  
Structural Response ◽  
Water Area ◽  
The Finite Element Method ◽  
Short Period ◽  
Classification Society ◽  
Element Method

The main objective of this study is to analyze the structural response of a boat during a slamming event using the Finite Element Method in a Small Water Area Twin Hull (SWATH) type boat.  In the mentioned load condition, the acceptance criteria established by a classification society must be fulfilled, taking into account the areas where this event affects the structure such as the junction deck, the pontoons and other structural members established by the standard, all this generated by the high pressure loads in the ship's structure in a very short period of time being an element of study in this type of vessels, as long as they are within the range of high speed vessels. Among the main results of this study were the deformations and stresses in the structure obtained under the reference parameters of the classification society.

Calculation of Heat Distribution in High Speed Cutting Based on Finite Element Method

2009 ◽  
Vol 626-627 ◽  
pp. 249-254
Author(s):  
Wang Yu Liu ◽  
X.K. Liu ◽  
Jing Li ◽  
Yong Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Speed ◽  
Experimental Result ◽  
Analytic Method ◽  
Heat Distribution ◽  
Analytic Model ◽  
The Finite Element Method ◽  
High Speed Cutting ◽  
Element Method

Combined the analytic method with the finite element method, the data necessary for calculating the heat distribution ratio for high speed cutting was mined first, and the experimental result was used to validate the authenticity of finite element modeling. Then, the ratio of heat distribution for high speed cutting based on the analytic model was obtained by customizing the special subroutine developed by the authors, which provides a new method for calculating the heat distribution.

Kinematic Analysis of Flexible Geneva Mechanisms

1988 ◽  
Vol 12 (2) ◽  
pp. 115-118
Author(s):  
R.G. Fenton ◽  
Wu Zhenbiao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Kinematic Analysis ◽  
High Speed ◽  
The Finite Element Method ◽  
Unit Force ◽  
Dynamic Component ◽  
Interactive Process ◽  
Unit Normal ◽  
Element Method

The deformation of Geneva wheels resulting from a unit normal unit force applied at the point of contact between the driving pin and the wheel is determined using the finite element method. The dynamic and static forces driving the Geneva wheel, and wheel deformations are computed. The output of the flexible Geneva wheel is determined with the help of an interpolating polynomial. An interactive process is used to update the dynamic component of the force based on the computed wheel acceleration values. Results indicate that the output of high speed flexible Geneva wheels is different from that obtained for Geneva mechanism having non-deforming links.

Synthesis and Steady State Analysis of High-Speed Elastic Cam Follower Linkages by a Finite Element Method

1991 ◽  
Author(s):  
Hsin-Ting J. Liu ◽  
Donald R. Flugrad
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Speed ◽  
The Finite Element Method ◽  
Linear Ordinary Differential Equations ◽  
Periodic Linear ◽  
Cam Follower ◽  
Cam Profile ◽  
Design Speed ◽  
Element Method

Abstract A cam driving a lumped inertia through an elastic slider-crank follower linkage with a curved beam coupler is considered. An iterative procedure utilizing the finite element method developed by Midha et al. (1978) is used to synthesize the cam profile to produce a desired output motion at a given design speed and damping coefficient. Nonlinear terms are neglected producing inhomogeneous. periodic, linear, ordinary differential equations. Response of the synthesized linkages are simulated and found to be satisfactory at the design conditions.

scholarly journals A study of vectorization for matrix-free finite element methods

2020 ◽  
Vol 34 (6) ◽  
pp. 629-644
Author(s):  
Tianjiao Sun ◽  
Lawrence Mitchell ◽  
Kaushik Kulkarni ◽  
Andreas Klöckner ◽  
David A Ham ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Performance ◽  
Practical Significance ◽  
Peak Performance ◽  
The Finite Element Method ◽  
Wide Range ◽  
Local Assembly ◽  
Matrix Free ◽  
Element Method

Vectorization is increasingly important to achieve high performance on modern hardware with SIMD instructions. Assembly of matrices and vectors in the finite element method, which is characterized by iterating a local assembly kernel over unstructured meshes, poses difficulties to effective vectorization. Maintaining a user-friendly high-level interface with a suitable degree of abstraction while generating efficient, vectorized code for the finite element method is a challenge for numerical software systems and libraries. In this work, we study cross-element vectorization in the finite element framework Firedrake via code transformation and demonstrate the efficacy of such an approach by evaluating a wide range of matrix-free operators spanning different polynomial degrees and discretizations on two recent CPUs using three mainstream compilers. Our experiments show that our approaches for cross-element vectorization achieve 30% of theoretical peak performance for many examples of practical significance, and exceed 50% for cases with high arithmetic intensities, with consistent speed-up over (intra-element) vectorization restricted to the local assembly kernels.

The Analysis of Vibration for Ballastless Track-Bridge Base on a Hybrid FE-SEA Method

2013 ◽  
Vol 405-408 ◽  
pp. 3213-3217
Author(s):  
Wen Jun Luo ◽  
Xiao Yan Lei ◽  
Song Liang Lian
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Vibration Analysis ◽  
High Performance ◽  
Beam Model ◽  
The Finite Element Method ◽  
Frequency Method ◽  
Ballastless Track ◽  
Track Bridge ◽  
Element Method

In this study, the methods for combining statistical energy analysis (SEA) and the finite element method (FEM) for the vibration analysis of structures are studied. Using the two methods simultaneously isnt entirely extend a primarily low frequency method, the finite element method, and high frequency method, SEA, to the mid frequency region are addressed. This approach is intended to extend the frequency range for a FEM based vibration analysis . A new finite element elementl for elevated slab ballastless track is proposed in which the new model can be used for modeling the track structural constituents of elevated slab ballastless track. Using finite element method and Hamilton theory, the coupled equation of vehicle-track-bridge can be established. In calculating example, both the rail displacement induced by single four-layer beam model. Specifically, it showed that the method yields very good result and high performance in the numerical example of previous research.

scholarly journals Optimal Design of a High-Speed Single-Phase Flux Reversal Motor for Vacuum Cleaners

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3334 ◽  
Author(s):  
Vladimir Dmitrievskii ◽  
Vladimir Prakht ◽  
Vadim Kazakbaev ◽  
Sergey Sarapulov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Optimal Design ◽  
High Speed ◽  
Single Phase ◽  
The Finite Element Method ◽  
Flux Reversal ◽  
Motor Efficiency ◽  
Rotor Structure ◽  
Element Method

This paper describes the design of a single-phase high-speed flux reversal motor (FRM) for use in a domestic application (vacuum cleaner). This machine has a simple and reliable rotor structure, which is a significant advantage for high-speed applications. An FRM design in which the inner stator surface is entirely used allows it to decrease its volume and increase its efficiency. The mathematical modeling, based on the finite element method, and the optimal design of the high-speed single-phase FRM are described. The criterion of optimization and the selection of a proper optimization algorithm are discussed. Since the finite element method introduces a small but quasi-random error due to round-off accumulation and choosing the mesh, etc., the Nelder-Mead method, not requiring the derivatives calculation, was chosen for the optimization. The target parameter of the optimization is built for the motor efficiency when operating at different loads. Calculations show that the presented approach provides increasing motor efficiency during the optimization, particularly at underload.

Synthesis and Steady State Analysis of High-Speed Elastic Cam-Actuated Linkages by a Finite Element Method

1993 ◽  
Vol 115 (4) ◽  
pp. 800-807 ◽  
Author(s):  
Hsin-Ting J. Liu ◽  
D. R. Flugrad
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Iterative Procedure ◽  
High Speed ◽  
The Finite Element Method ◽  
Linear Ordinary Differential Equations ◽  
Periodic Linear ◽  
Cam Profile ◽  
Design Speed ◽  
Element Method

A cam driving a lumped inertia through an elastic slider-crank follower linkage with a curved beam coupler is considered. An iterative procedure utilizing the finite element method developed by Midha et al. (1978) is used to synthesize the cam profile to produce a desired output motion at a given design speed and damping coefficient. Nonlinear terms are neglected producing inhomogeneous, periodic, linear, ordinary differential equations. Responses of the synthesized linkages are simulated and found to be satisfactory at the design conditions.

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