Random displacement and acceleration responses of vehicles with uncertainty

Dai, Jun; Gao, Wei; Zhang, Nong

doi:10.1007/s12206-011-0308-0

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…Việc ứng dụng mô hình toán học vào phân tích gia tốc người lái và chuyển vị tương đối hệ thống treo từ lâu đã được nghiên cứu 5,8 . Trong đó, nghiên cứu phân tích gia tốc thân xe với mô hình 1 4 xe 2DOF chịu kích thích mặt đường ngẫu nhiên đánh giá độ êm dịu của hành khách theo tốc độ chuyển động 9,10 . Phân tích đáp ứng gia tốc thân xe và chuyển vị tương đối hệ thống treo xe với mô hình thống treo ghế ngồi người lái xe buýt bằng mô hình 1DOF 13 .…”

Section: Giới Thiệuunclassified

Application of simulation methods on vibration analysis of a bus driver seat using the quarter car 3DOF model subjected under harmonic excitation

TRAN,

Pham

2023

Sci. Tech. Dev. J. - Eng. Tech

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Vibration of bus driver's seat subjected under harmonic excitation, 3DOF (3 degrees of freedom) dynamic model is employed to carry out the calculation by 3 simulation methods. Mathematical model - numerical using Matlab programming language (Numerical model), Multi Body Dynamics (MBD) using Matlab Simmechanics tool (MBD model) and finite element model using Ansys APDL (FEM model) are employed. The strengths and limitations of each method are analyzed through the process of building models and retrieving the resulting data. The evaluation indexes include the response of driver's seat acceleration, response of the seat suspension's relative displacement and the seat suspension's vibration isolation ability according to two investigated cases of natural frequency and damping ratio. The obtained results from all 3 methods have no difference and the evaluation indexes are suitable according to the studies on vehicle vibration response. The Numerical model method requires the user to perform complex mathematical modeling. The MBD model method using Matlab Simmechanics is simpler, using built-in function blocks, requiring declarations to establish the exact initial equilibrium position of the mass elements. The FEM model method using Ansys APDL with keypoints and lines describing the model elements requires precise setting of the displacement of each keypoint. However, both the MBD and FEM model methods are only effective when investigating the response in the time domain for a particular instance of the excitation frequency. When analyzing the response in the frequency domain, which requires accessing and synthesizing data of many cases in the investigated frequency range, these two methods have many limitations in the calculation process, specifically, in performing complex computations with many loops and variables. Solving problems also takes longer than numerical method using mathematical model. The obtained results are analyzed in the time domain, frequency domain, and the value domain of the driver's seat suspension parameters. This result serves as a basis for developing the design of the driver's seat suspension system with nonlinear spring and shock absorber, and the selection of a calculation method suitable for each problem in the field of vehicle vibration.

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Section: Giới Thiệuunclassified

Application of simulation methods on vibration analysis of a bus driver seat using the quarter car 3DOF model subjected under harmonic excitation

TRAN,

Pham

2023

Sci. Tech. Dev. J. - Eng. Tech

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“…Electrodeposition of AuNPs on polymer modified electrode was carried out by potential cycling between 0 to 1.3 V (vs Ag/AgCl) at a scan rate of 0.1 Vs −1 for a total of 20 cycles in 0.05 M H 2 SO 4 solution containing 1.0 × 10 −3 M HAuCl 4 . 30 The gold nanoparticle modified GCE (AuNP/GCE) was prepared by the same procedure.…”

Section: Preparation Of Aunp/poly(p-absa)/gce-prior To Use Gcementioning

confidence: 99%

Electrochemical Sensor for Propyl Gallate, Based on Synergic Effect of Gold Nanoparticle and Poly(p-aminobenzenesulfonic Acid)

Cyriac

Thomas

Vikraman

et al. 2016

J. Electrochem. Soc.

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The present work reports the application of gold nanoparticle (AuNP)/poly(p-aminobenzenesulfonic acid) [poly(p-ABSA)] composite modified glassy carbon electrode (GCE) for the electrochemical determination of propyl gallate (PG). The AuNP/poly(p-ABSA) composite showed excellent electron transfer ability for the oxidation of PG by lowering the oxidation potential and remarkably enhancing the current response. Experimental parameters such as effect of pH, number of cycles of electro deposition, thickness of polymer film and scan rate were optimized. The calibration curve showed that the oxidation peak current was proportional to the concentration of PG in the range 1.0 × 10 −4 to 9.0 × 10 −6 M, with a correlation coefficient of 0.997 and limit of detection of 1.9 × 10 −7 M. Diffusion coefficient of 2.3 × 10 −6 cm 2 s −1 was calculated from chronoamperometric measurements. The designed sensor shows excellent reproducibility and stability. The developed sensor was successfully used to determine PG in edible vegetable oils and recoveries were between 98.9 and 101.3%.

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“…The most accurate of these is Monte Carlo(MC) simulation, but this often requires thousands of deterministic simulations to obtain uncertainty statistics, which is infeasible for computationally expensive CFD simulations (Dodson and Parks (2015)). Dai et al (2011) applied MC method to the field of automobile suspension and considered the sprung mass, unsprung mass, suspension damping, and tire stiffness as random variables. The mean value, standard deviation and variation coefficient of the vehicle's natural frequencies and mode shapes are obtained by using the MC method.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty Analysis of Quasi-Zero Stiffness Air Suspension based on Polynomial Chaos Method

Liu

Jiang

et al. 2021

Preprint

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In order to improve the vibration isolation performance of suspensions, various new structural forms of suspensions have been proposed. In this paper, a quasi-zero stiffness isolator is used in automotive suspensions to form a new suspension-quasi-zero stiffness air suspension(QZSAS).Due to the strong nonlinearity and structural complexity of quasi-zero stiffness suspensions, changes in structural parameters may cause dramatic changes in suspension performance, so it is of practical importance to study the effect of structural parameter uncertainty on the performance of such suspensions. In order to solve this problem, three suspension structural parameters d0,L0,Pc0 are selected as random variables in this paper, and the polynomial chaos expansion(PCE) theory is used to solve the suspension performance parameters such as body acceleration, suspension dynamic deflection, and wheel relative dynamic load response under different excitation. The sensitivity of the performance parameters to different structural parameters was discussed and analysed in the frequency domain. This paper verifies the feasibility of the PCE method for solving the uncertainty problem of complex nonlinear systems, and the research in this paper can provide a reference for the future structural design and optimization of such suspension systems.

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Random displacement and acceleration responses of vehicles with uncertainty

Cited by 9 publications

References 23 publications

Application of simulation methods on vibration analysis of a bus driver seat using the quarter car 3DOF model subjected under harmonic excitation

Application of simulation methods on vibration analysis of a bus driver seat using the quarter car 3DOF model subjected under harmonic excitation

Electrochemical Sensor for Propyl Gallate, Based on Synergic Effect of Gold Nanoparticle and Poly(p-aminobenzenesulfonic Acid)

Uncertainty Analysis of Quasi-Zero Stiffness Air Suspension based on Polynomial Chaos Method

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