Time domain responses of hydraulic bushing with two flow passages

Chai, Tan; Dreyer, Jason T.; Singh, Rajendra

doi:10.1016/j.jsv.2013.09.037

Cited by 14 publications

(41 citation statements)

References 9 publications

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“…Experimental studies with sinusoidal displacement excitation A laboratory device, as described by Chai et al, 20 is utilized to characterize bushing nonlinearities and to develop a nonlinear mathematical model. As shown in Figure 2(a), 20 this device consists of two similar chambers filled with water and a customized mid-plate which accommodates an external long flow passage and a short flow passage.…”

Section: Inner Metalmentioning

confidence: 99%

“…Also, the short flow passage with diameter d s = 3d i =2 and length l s '9d s is formed by utilizing a needle valve that is embedded in the mid-plate. By adjusting the orifice diameter d o (inside the needle valve), a short passage with different flow restrictions can be constructed (see the paper by Chai et al 20 for more details). To simulate typical real-life fluid-filled bushing designs, five configurations of the prototype, as illustrated in Figure 2(b) to (d), are evaluated.…”

Section: Inner Metalmentioning

confidence: 99%

“…Thus, the Q(v) values (peak to peak) are calculated by using equation (20) from 1 Hz to 60 Hz, with X = 0.1 mm and 1.0 mm, and then compared with the numerical integration results in Figure 11. Both methods yield almost the same results for the long passage (configuration B1), although the peak magnitude predicted by equation (20) with X = 1.0 mm is slightly higher. However, some discrepancies are observed for configuration B2, as shown in Figure 12, especially with the X = 1.0 mm case.…”

Section: Construction Of the Analytical Sinusoidal Solution To The Nomentioning

confidence: 99%

“…Note that, although hydraulic bushings are somewhat similar to the hydraulic engine mount, their application, design, construction, and dynamic performance are different. 1,2,20,21 Hydraulic mounts, which are usually equipped with fixed or free decouplers, are widely employed to support vehicle engines and to control motion mostly at lower frequencies. The excitation is applied to the mount top.…”

Section: Introductionmentioning

confidence: 99%

“…The two fluid chambers are almost identical, and some bushing designs have a leakage (bypass) path in parallel with an inertia track to communicate fluid under high-amplitude deflection. 1,20 Overall, hydraulic engine mount models cannot be directly applied to fluid-filled bushings because of the differences discussed above.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Nonlinear dynamic properties of hydraulic suspension bushing with emphasis on the flow passage characteristics

Chai

Dreyer

Singh

2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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Hydraulic bushings, which are often employed in vehicle suspension systems, exhibit significant excitation-dependent properties. However, previous analyses were mainly based on the linear system theory. To overcome this void, nonlinear characteristics of common hydraulic bushing configurations are examined in this article, with focus on the component properties as excited by sinusoidal or step displacements of various amplitudes. First, a nonlinear model for a laboratory prototype with a long passage and a short passage (in parallel) is developed using a lumped-parameter approach. Then the system parameters and nonlinearities are identified using experimental and computational methods, with an emphasis on characterization of the flow passage resistances. Steady-state harmonic and transient step experiments are conducted on the prototype, and the dynamic pressures inside two fluid chambers and the force transmitted to the base are measured. Numerical solution of the nonlinear model shows that the proposed model predicts both steady-state sinusoidal responses and transient responses well for single-passage and dual-passage configurations; significant improvement over a corresponding linear model is observed. Finally, approximate analytical and semi-analytical solutions of the nonlinear model are obtained by using the harmonic balance method.

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Section: Inner Metalmentioning

confidence: 99%

Section: Inner Metalmentioning

confidence: 99%

Section: Construction Of the Analytical Sinusoidal Solution To The Nomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nonlinear dynamic properties of hydraulic suspension bushing with emphasis on the flow passage characteristics

Chai

Dreyer

Singh

2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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Harmonic amplitude dependent dynamic stiffness of hydraulic bushings: Alternate nonlinear models and experimental validation

Fredette

Dreyer

Rook

et al. 2016

Mechanical Systems and Signal Processing

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The dynamic stiffness properties of automotive hydraulic bushings exhibit significant amplitude sensitivity which cannot be captured by linear time-invariant models. Quasi-linear and nonlinear models are therefore proposed with focus on the amplitude sensitivity in magnitude and loss angle spectra (up to 50 Hz). Since the model parameters of a production bushing are unknown, dynamic stiffness tests and laboratory experiments are utilized to extract model parameters. Nonlinear compliance and resistance elements are incorporated, including their interactions in order to improve amplitude sensitive predictions. New solution approximations for the new system equations (containing both nonlinear compliance and resistance elements) refine the multi-term harmonic balance term method. Quasi-linear models yield excellent accuracy but lack the ability to predict trends in amplitude sensitivity since they rely on available dynamic stiffness measurements. Nonlinear models containing both nonlinear resistance and compliance elements yield superior predictions to those of prior models (with a single resistance or compliance nonlinearity), while also providing more physical insight. Suggestion for further work is briefly mentioned.

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Effect of fractionally damped compliance elements on amplitude sensitive dynamic stiffness predictions of a hydraulic bushing

Fredette

Singh

2018

Mechanical Systems and Signal Processing

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Time domain responses of hydraulic bushing with two flow passages

Cited by 14 publications

References 9 publications

Nonlinear dynamic properties of hydraulic suspension bushing with emphasis on the flow passage characteristics

Nonlinear dynamic properties of hydraulic suspension bushing with emphasis on the flow passage characteristics

Harmonic amplitude dependent dynamic stiffness of hydraulic bushings: Alternate nonlinear models and experimental validation

Effect of fractionally damped compliance elements on amplitude sensitive dynamic stiffness predictions of a hydraulic bushing

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