Estimation of interfacial forces in time domain for linear systems

Gunduz, Aydin; Singh, Rajendra

doi:10.1016/j.jsv.2010.01.003

Cited by 9 publications

(3 citation statements)

References 26 publications

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“…The values of these parameters are listed in Table 1. 24 According to Newton's second law, the differential motion equation of the multi-path isolation system can be established as follows…”

Section: Modeling Of a Multi-path Vibration Isolation Systemmentioning

confidence: 99%

Vibration source identification of a heavy commercial vehicle cab based on operational transfer path analysis

Zhang

Pan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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Operational transfer path analysis is applied in this study to identify the vibration source and its critical transfer path. A simple analytical five-degrees-of-freedom mechanical isolation system is first taken as an example to illustrate the analysis flow and to validate the accuracy of operational transfer path analysis. The acceleration amplitude spectrum of the receiver is used to prove the accuracy, and the path contribution of each path is used to identify the critical path. Operational transfer path analysis is then applied to the cab mount system of a heavy commercial vehicle to identify the vibration source and its critical transfer path. The vibration energy propagation capabilities from the four cab mounts to the driver’s seat are analyzed by operational transfer path analysis with the path contribution analysis, and the maximum vibration source is identified by the path operation contribution analysis. The analysis and evaluation method of the operational transfer path analysis introduced in this study can provide a research foundation and reference for vibration or noise source identification in mechanical systems.

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Section: Modeling Of a Multi-path Vibration Isolation Systemmentioning

confidence: 99%

Vibration source identification of a heavy commercial vehicle cab based on operational transfer path analysis

Zhang

Pan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Minimization of dynamic forces that are transmitted to rigid, compliant foundations in machines, vehicles and buildings is an important design paradigm in vibration and structure-borne noise control. Yet, the interfacial forces are difficult to measure using direct methods under realistic conditions [1][2][3] . Therefore, indirect methods must be utilized to estimate dynamic forces and moments using the internal states or motions of the isolation paths, vibration sources and receiving structures [1][2][3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

“…Yet, the interfacial forces are difficult to measure using direct methods under realistic conditions [1][2][3] . Therefore, indirect methods must be utilized to estimate dynamic forces and moments using the internal states or motions of the isolation paths, vibration sources and receiving structures [1][2][3][4][5] . Further, most vibration isolators and machinery mounts are inherently nonlinear [6][7][8] and consequently improved system identification models are needed to assess forces from motion and/or internal state measurements.…”

Section: Introductionmentioning

confidence: 99%

Dynamic force transmitted by hydraulic mount: Estimation in frequency domain using motion and/or pressure measurements and quasi-linear models

Yoon¹,

Singh²

2010

Noise Control Eng. J.

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This article proposes indirect methods to estimate dynamic forces that are transmitted by a fixed or free decoupler type hydraulic engine mount to a rigid base. First, the linear system transfer functions that relate the force transmitted to the top chamber pressure and excitation displacement are derived in the Laplace and frequency domains; these clearly identify the roles of rubber and hydraulic force paths up to 50 Hz. Since hydraulic mounts are inherently nonlinear, a quasi-linear model is developed that incorporates amplitudesensitive and spectrally-varying parameters such as top chamber compliance and rubber path properties (stiffness and damping).Alternate schemes based on a quasi-linear fluid system formulation work well as dynamic force spectra over a range of harmonic displacement excitations are successfully predicted given motion and/or pressure measurements; these compare well with measured forces over a range of frequencies and excitation amplitudes. In particular, the force to pressure transfer function model is quite promising. Conversely, the analogous mechanical system model fails as it yields highly inaccurate forces. The force time history is also briefly predicted by applying the Fourier expansion with an embedded quasi-linear fluid model with only the fundamental (excitation) frequency.

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Indirect measurement of dynamic force transmitted by a nonlinear hydraulic mount under sinusoidal excitation with focus on super-harmonics

Yoon¹,

Singh²

2010

Journal of Sound and Vibration

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Estimation of interfacial forces in time domain for linear systems

Cited by 9 publications

References 26 publications

Vibration source identification of a heavy commercial vehicle cab based on operational transfer path analysis

Vibration source identification of a heavy commercial vehicle cab based on operational transfer path analysis

Dynamic force transmitted by hydraulic mount: Estimation in frequency domain using motion and/or pressure measurements and quasi-linear models

Indirect measurement of dynamic force transmitted by a nonlinear hydraulic mount under sinusoidal excitation with focus on super-harmonics

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