Reduction of Stresses and Mass of an Engine Rubber Mount Subject to Mechanical Vibrations

Dávalos, Omar; Caldiño-Herrera, Uzziel; Cornejo-Monroy, Delfino; Tenango-Pirin, Oscar; García, J. C.; Basurto-Pensado, M. A.

doi:10.5545/sv-jme.2020.7051

Cited by 4 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in the powertrain mounting system, the shape of rubber mounts is mostly irregular. 12,13 For double isolation rubber mounts with irregular shapes, the finite element method is mostly used to analyze the high-frequency dynamic characteristics. Hazra and Janardhan Reddy 14 calculated the high-frequency (50–2k Hz) dynamic stiffness of the double isolation rubber mount, and compared it with the dynamic stiffness of the conventional rubber mount.…”

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of high-frequency dynamic characteristics of double isolation rubber mounts

Liu

Sun

Shi

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

Rubber mounts are the vital component to reduce the vibration translated from the powertrain to the vehicle body. The dynamic stiffness of the conventional rubber mount increase with the increase of the excitation frequency, and form a peak under high-frequency excitation in the battery electric vehicle (BEV). So the double isolation rubber mount has gradually been used in the BEV powertrain to improve the vibration isolation performance in the high-frequency range. Compared with conventional rubber mounts, the double isolation rubber mount has smaller dynamic stiffness in the high-frequency range. However, the traditional simulation model of the dynamic characteristics cannot consider the influence of the metal bracket of the double isolation rubber mount on the dynamic characteristics. Therefore, it is necessary to carry out the modeling and analysis of the dynamic characteristics simulation model of the double isolation rubber mount. In this paper, a general dynamic model of double isolation rubber mounts is proposed to describe the high-frequency dynamic characteristics. In this general dynamic model, the complex stiffness element representing the viscoelasticity of rubber is expressed using the fractional derivative model and the Maxwell model, respectively, and two high-frequency dynamic models are established. Two model parameter identification methods are proposed for high-frequency dynamic models of double isolation rubber mounts, and the identification results are compared and analyzed. Then, two high-frequency dynamic models are used to simulate the high-frequency dynamic characteristics of double isolation rubber mounts. The simulation results show that both high-frequency dynamic models can calculate the high-frequency dynamic characteristics of double isolation rubber mounts. Among them, the dynamic model based on fractional derivative elements has relatively high accuracy, and the dynamic model based on Maxwell elements has relatively high stability. The high-frequency dynamic characteristic modeling method of double isolation rubber mounts presented in this paper is helpful to the vibration and noise analysis of electric vehicle powertrain systems under high-frequency excitation.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of high-frequency dynamic characteristics of double isolation rubber mounts

Liu

Sun

Shi

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

An optimum structural design method for a torque sensor measuring the control moment of the micro flapping-wing robot

Wang,

Song,

Zhang

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

This paper presents an optimum structural design method for a sensor capable of measuring the control torque of the micro flapping-wing robot. The method focuses on the development of a multi-objective optimization method based on the surrogate model to solve the sensor indicator design issues, for example, increasing sensitivity while meeting bandwidth requirements. Initially, Latin hypercube sampling was applied to the choice of the characteristic parameters of the sensor. Based on finite element techniques, the surrogate models describing deformation displacement and characteristic frequency were established to characterize the sensor indicators, and a mul-ti-objective optimization was conducted. According to the optimization results, the sensor struc-ture was manufactured, and a torque measurement platform was set up. Calibration experiments and frequency response experiments demonstrated a high level of consistency between theoretical analysis results and experimental data. Under a given torque, the error between the theoretical displacement deformation and experimental values of the sensor was approximately 2%, while the error between the theoretical and experimental values of the frequency response was 7.47%. This indicates that the optimum structural design method can be utilized for the theoretical guidance design of high-resolution torque sensors, thus laying the foundation for the control torque meas-urement of micro flapping-wing robots.

show abstract

Research on fatigue life of all-terrain vehicle control arm based on measured load spectrum

Zou¹,

Zhou²,

Xiao³

et al. 2022

Cobot

View full text Add to dashboard Cite

Background: All-terrain vehicles are mostly used in poor driving environments. A key part of the suspension mechanism of all-terrain vehicles, the lower control arm, bears various loads when the vehicle is driving. This component is prone to be fatigue and failure, which affects the performance of the entire vehicle. Therefore, in order to improve the performance of all-terrain vehicles, the fatigue life of the lower control arm was studied based on the measured force load spectrum. Methods: Firstly, the finite element model of the lower control arm is established, the free modal simulation analysis is carried out, and the experimental research is carried out by building a modal test system. Then combining the calculated modal and experimental modal results, the finite element model is verified. Next, through the road load spectrum acquisition test in the automobile proving ground, the force time history of the lower control arm is obtained, and the signal is processed and analyzed to verify the reliability of the force load signal. On this basis, the boundary constraints of the lower control arm are established based on the actual working conditions of the all-terrain vehicle, and the dynamics simulation analysis is carried out with the measured force as input. Finally, according to stress-strain signal in dynamic analysis results, combining the modified local stress-strain method and the Landgrave damage criterion, the fatigue life of the lower control arm is calculated. Results: The minimum fatigue cycle life of the lower control arm on the test roads is 3.56×105 km, and its fatigue life meets the design and use requirements. Conclusions: The result shows that based on the actual driving load spectrum, the actual driving fatigue life can be calculated and forecasted more accurately.

show abstract

Reduction of Stresses and Mass of an Engine Rubber Mount Subject to Mechanical Vibrations

Cited by 4 publications

References 25 publications

Modeling and analysis of high-frequency dynamic characteristics of double isolation rubber mounts

Modeling and analysis of high-frequency dynamic characteristics of double isolation rubber mounts

An optimum structural design method for a torque sensor measuring the control moment of the micro flapping-wing robot

Research on fatigue life of all-terrain vehicle control arm based on measured load spectrum

Contact Info

Product

Resources

About