scholarly journals Weight-Vibration Pareto Optimization of a Triple Mass Flywheel for Heavy-Duty Truck Powertrains

Machines ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 50
Author(s):  
Viktor Berbyuk
Keyword(s):  
Total Mass ◽  
Optimization Method ◽  
Pareto Optimization ◽  
Design Parameters ◽  
Vibration Absorber ◽  
Optimized Design ◽  
Heavy Duty ◽  
Mean Values ◽  
Input Shaft ◽  
Heavy Duty Truck

Enhanced efficiency of heavy-duty truck powertrains with constraints imposed on noise, vibration, and harshness requires novel solutions for torsion vibrations attenuation. In the paper, the weight-vibration Pareto optimization problem for a novel vibration absorber, a triple mass flywheel, for application in heavy-duty truck powertrains is considered. Global sensitivity analysis and Pareto optimization method are used to design a novel vibration absorber. The optimization method attempts to minimize oscillations of the torque at the transmission input shaft as well as to minimize total mass inertia of the absorber. It is shown that there exists a Pareto front between the measure of the attenuation of oscillations of the torque and the total mass inertia of a triple mass flywheel. The optimized design parameters for the absorber are obtained that provide the best attenuation of oscillations of the torque at the transmission input shaft for different mean values of the engine driving torque. The analysis shows real evidence of the feasibility of the application of this concept of vibration absorbers in heavy-duty truck powertrains. It is also shown that optimized design parameters of a triple mass flywheel put this concept in a superior position in comparison with a dual mass flywheel.

scholarly journals Design Optimization of Torsional Vibration Absorbers for Heavy-Duty Truck Drivetrain Systems

Vibration ◽  
2019 ◽  
Vol 2 (3) ◽  
pp. 240-264 ◽  
Author(s):  
Viktor Berbyuk
Keyword(s):  
Energy Efficiency ◽  
Torsional Vibration ◽  
Optimization Method ◽  
Design Parameters ◽  
Vibration Absorbers ◽  
Heavy Duty ◽  
Input Shaft ◽  
Heavy Duty Truck ◽  
Engine Order ◽  
Show Evidence

In this paper, the feasibility of the application of a dual mass flywheel (DMF) for heavy-duty truck drivetrain systems was studied. The third engine order vibration harmonic was in the focus of analysis as one of the most significant contributions to the oscillatory response in the drivetrain systems of heavy-duty trucks. Global sensitivity analysis (GSA) and Pareto optimization were used for designing torsional vibration absorbers in an operating engine speed range of 600–2000 rpm. The optimization method attempted both to minimize the oscillations of the torque at the transmission input shaft and to maximize the energy efficiency of the vibration absorber. The GSA enabled the appropriate scanning of the domain of design parameters by varying all the parameters at the same time. It provided deep insight into the design process and increased the computational efficiency of the optimization. The results obtained show the following: the solution of the bi-objective optimization problem for torsional vibration absorbers does exist; Pareto fronts were obtained and analyzed for the DMF, presenting a trade-off between the measure of the attenuation of the oscillations of the torque at the transmission input shaft and the measure of the energy efficiency of the absorber; the optimized mass inertia, stiffness and damping parameters of a DMF do exist, providing the best attenuation of the torque oscillations; the performance of a DMF was further enhanced by incorporating a torsional tuned mass damper with appropriate optimized parameters. Finally, the results show evidence of the feasibility of the application of dual mass flywheels in heavy-duty truck drivetrain systems.

Analysis of power split vibration absorber performance in heavy-duty truck powertrains

2020 ◽  
Vol 234 (10-11) ◽  
pp. 2509-2521 ◽  
Author(s):  
Lina Wramner
Keyword(s):  
New Technology ◽  
Installation Space ◽  
Design Parameters ◽  
Vibration Absorber ◽  
Combustion Engines ◽  
Heavy Duty ◽  
Heavy Duty Truck ◽  
Power Split ◽  
Speed Range ◽  
Efficient Combustion

The current development of more efficient combustion engines leads to an increase in engine torsional vibrations; therefore, new technology is needed for reducing the vibrations transmitted from the engine to the driveline. In this article, the concept of power split vibration absorber is evaluated. A mathematical model of the power split vibration absorber is presented, and an analytical study shows how different design parameters affect the power split vibration absorber performance. Numerical simulations with models representing typical heavy-duty truck powertrains are used in the evaluations. It is concluded that for a low level of damping, the power split vibration absorber can provide significantly lower vibration amplitudes than a corresponding dual mass flywheel within a limited speed range. If the power split vibration absorber is optimised for the critical low engine speeds, an overall decrease in the level of vibration can be obtained, but a larger installation space than with a conventional dual mass flywheel would probably be required.

scholarly journals Analysis and Optimisation of Ride Vibration of a Heavy-Duty Truck Based on a Vertical-Pitch-Roll Driver-Vehicle Coupled Dynamic Model

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Peng Guo ◽  
Jiewei Lin ◽  
Zefeng Lin ◽  
Jinlu Li ◽  
Chi Liu ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Degrees Of Freedom ◽  
Ride Comfort ◽  
Design Method ◽  
Human Model ◽  
Design Parameters ◽  
Heavy Duty ◽  
Heavy Duty Truck ◽  
Heavy Duty Vehicle ◽  
Vehicle Dynamic Model

The ride comfort and the cargo safety are of great importance in the vibration design of heavy-duty vehicle. Traditional ride comfort design method based on the response of components of vehicles or interaction between human and seat overlooks the most direct criterion, the response of occupants, which makes the optimisation not targeted enough. It will be better to conduct the ride comfort design with the biodynamic response of driver. To this end, a 17-degrees-of-freedom (DOFs) vertical-pitch-roll vehicle dynamic model of a three-axle heavy-duty truck coupled with a 7 DOFs human model is developed. The ride comfort of human body under the vertical, the pitch, and the roll vibrations can be evaluated with the weighted root-mean-square (r.m.s.) acceleration of the driver in multiple directions. The flexibilities of chassis and carriage are also considered to improve the accuracy of the prediction of the ride comfort and to constrain the mounting optimisation of cab and carriage. After validation, the sensitivity analysis of the mounting system, the suspensions, and arrangement of sprung masses is carried out and significant factors to ride vibration are identified. The optimal combination of design parameters is obtained with the objective of minimizing the vibration of the driver and carriage simultaneously. The optimisation result shows that the weighted driver vibration is reduced by 27.9% and the carriage vibration is reduced by 31.8% at various speeds.

An Efficient Feasibility Robust Optimization Method Using a Sensitivity Region Concept

2004 ◽  
Author(s):  
S. Gunawan ◽  
S. Azarm
Keyword(s):  
Probability Distribution ◽  
Robust Optimization ◽  
Control Valve ◽  
Optimization Method ◽  
Parameter Variation ◽  
Design Parameters ◽  
Optimized Design ◽  
Large Parameter ◽  
Parameter Variations ◽  
Feasible Domain

We present a new robust optimization method that ensures feasibility of an optimized design when there are uncontrollable variations in design parameters. This method is developed based on the notion of a sensitivity region, which is a measure of how far a feasible design is from the boundary of a feasible domain in the parameter variation space. As the design moves further inside the feasible domain, and thus becoming more feasibly robust, the sensitivity region becomes larger. Our method is not sampling-based so it does not require a presumed probability distribution as input and is efficient in terms of function evaluations. In addition, our method does not use gradient approximation and thus is applicable to problems having non-differentiable constraint functions and large parameter variations. As a demonstration, we applied our method to an engineering example, the design of a control valve actuator linkage. In this example, we show that the method is efficient and the optimum design obtained is robust.

Pareto Optimization of Heavy Duty Truck Rear Underrun Protection Design for Regulative Load Cases

2014 ◽  
Vol 7 (2) ◽  
pp. 726-735 ◽  
Author(s):  
Berna Balta ◽  
Onur Erk ◽  
H. Ali Solak ◽  
Numan Durakbasa
Keyword(s):  
Pareto Optimization ◽  
Heavy Duty ◽  
Heavy Duty Truck

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.

Dual-mass flywheels with tuned vibration absorbers for application in heavy-duty truck powertrains

2020 ◽  
Vol 234 (10-11) ◽  
pp. 2500-2508 ◽  
Author(s):  
Lina Wramner
Keyword(s):  
Combustion Engine ◽  
Vibration Absorber ◽  
Torsional Vibrations ◽  
Vibration Absorbers ◽  
Heavy Duty ◽  
Heavy Duty Truck ◽  
Tuned Vibration Absorbers ◽  
Resonance Frequencies ◽  
Tuning Frequency ◽  
Tuned Vibration Absorber

As the heavy-duty combustion engine development goes towards lower rotational speeds and higher cylinder pressures, the torsional vibrations increase. There is therefore a need to identify and study new types of vibration absorbers that can reduce the level of torsional vibrations transmitted from the engine to the gearbox. In this work, the concept of a dual-mass flywheel combined with a tuned vibration absorber is analysed. The tuned vibration absorber efficiently reduces the vibration amplitudes for engine load frequencies near the tuning frequency, but it also introduces an additional resonance into the system. By placing the tuned vibration absorber on an intermediate flange between the two dual-mass flywheels, the introduced resonance frequency will be lower than the tuning frequency and a resonance in operating engine speed range can be avoided. Numerical simulations are used to show how the torsional vibration amplitudes in a heavy-duty truck powertrain are affected by the tuned vibration absorber and how the different parameters of the tuned vibration absorber and the dual-mass flywheel affect the torsional vibrations and the resonance frequencies.

A Feasibility Robust Optimization Method Using Sensitivity Region Concept

2004 ◽  
Vol 127 (5) ◽  
pp. 858-865 ◽  
Author(s):  
S. Gunawan ◽  
S. Azarm
Keyword(s):  
Probability Distribution ◽  
Robust Optimization ◽  
Control Valve ◽  
Optimization Method ◽  
Parameter Variation ◽  
Design Parameters ◽  
Optimized Design ◽  
Large Parameter ◽  
Parameter Variations ◽  
Feasible Domain

We present a robust optimization method that ensures feasibility of an optimized design when there are uncontrollable variations in design parameters. This method is developed based on the notion of a sensitivity region, which is a measure of how far a feasible design is from the boundary of a feasible domain in the parameter variation space. In this method, as the design moves further inside the feasible domain, and thus becoming more feasibly robust, the sensitivity region becomes larger. Our method is not sampling based so it does not require a presumed probability distribution as input and is reasonably efficient in terms of function evaluations. In addition, our method does not use gradient approximation and thus is applicable to problems that have nondifferentiable constraint functions and large parameter variations. As a demonstration, we applied our method to an engineering example, the design of a control valve actuator linkage. In this example, we show that our method finds an optimum design which is feasibly robust.

scholarly journals Performance Optimization of a Diesel Engine with a Two-Stage Turbocharging System and Dual-Loop EGR Using Multi-Objective Pareto Optimization Based on Diesel Cycle Simulation

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4223 ◽  
Author(s):  
Heecheong Yoo ◽  
Bum Park ◽  
Honghyun Cho ◽  
Jungsoo Park
Keyword(s):  
Performance Optimization ◽  
Fuel Efficiency ◽  
Test Procedure ◽  
Dilution Effect ◽  
Optimization Method ◽  
Pareto Optimization ◽  
Design Parameters ◽  
Cylinder Pressure ◽  
Multi Objective ◽  
Cycle Simulation

The effects of an electric supercharger (eS) and a dual-loop exhaust gas recirculation (EGR) system on a passenger car’s diesel engine’s emissions and fuel efficiency under various worldwide harmonized light-duty vehicles test procedure (WLTP) reference operation points were investigated using a one-dimensional engine cycle simulation, called GT-Power. After heavy EGR application, the in-cylinder pressure and temperature declined due to a dilution effect. As eS power and rpm increased, the brake-specific fuel consumption (BSFC) decreased because the effects of the air flow rate increased. However, it was unavoidable that nitrogen oxide (NOx) emissions also increased due to the higher in-cylinder pressure and temperature. To induce more EGR to the intake system, a dual-loop EGR system was applied with eS at different low-pressure EGR (LP-EGR) fractions (0, 0.25, 0.5, 0.75, and 1.0). Under these conditions, a design of experiment (DoE) procedure was carried out and response surface plots of the BSFC and brake-specific NOx (BSNOx) were prepared. A multi-objective Pareto optimization method was used to improve the trade-off in results between the BSFC and BSNOx. Through optimization, optimal Pareto fronts were obtained, which suggested design parameters for eS power and rpm to control the engine under various LP fraction conditions.

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