A modal analysis of vibration response of a cracked fluid-filled cylindrical shell

Zheng, Shuihua; Yu, Yankun; Qiu, Mianzhen; Wang, Liumin; Tan, Dapeng

doi:10.1016/j.apm.2020.09.040

Cited by 45 publications

(14 citation statements)

References 20 publications

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“…To simplify the matter, some assumptions are made, that is, that the flow field is assumed to be three-dimensional and incompressible. 26,27 The Mixture model is a typical multiphase flow model suitable for simulating uniform multiphase flow with different velocities between phases, and each phase is interpenetrated. Moreover, the abrasive phase (the discrete phase) is treated as a quasi-fluid, mixed with fluid-phase, so there is only a set of momentum equations.…”

Section: Multiphase Flow Modelmentioning

confidence: 99%

Investigation on the flow field regulation characteristics of the right-angled channel by impinging disturbance method

Wang

Yin

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The right-angled constrained channel with square-section is a typical channel configuration in many engineering fields. However, due to the high curvature of the right-angled constrained channel, the flow field parameters are not uniformly distributed, which has an adverse effect on resource utilization or reaction efficiency of the industrial process. To address the above matters, the modeling and solving method for impinging disturbance-based flow field regulation are proposed to regulate the flow field distribution. According to the design criteria of the disturbance channel, a numerical model of impinging disturbance is set up based on the mixture multiphase model and realizable [Formula: see text] turbulence model. And the pressure–velocity coupling solution strategies are conducted to quickly solve the impinging disturbance mechanism. The distribution law of the flow field parameters at different disturbance velocities is obtained to reveal the turbulence variation mechanism caused by impinging disturbance. These research results show that the disturbance vortex produced by the collision between the disturbance flow and the mainstream can affect the parameter distribution characteristics of the flow field in the constrained channel together with the backflow vortex, dean vortex, and the secondary vortex. The disturbance flow can effectively interfere with or control the vortex structure and indirectly regulate the flow field parameters to improve uniformity and energy utilization by actively regulating the disturbance velocity.

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Section: Multiphase Flow Modelmentioning

confidence: 99%

Investigation on the flow field regulation characteristics of the right-angled channel by impinging disturbance method

Wang

Yin

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…Ultrasonic wave in the flow channel mainly produces the corresponding periodic pressure and the cavitation phenomenon [18] [19] . At present, there is no perfect solution to the simulation of ultrasonic cavitation in turbulent flow field.…”

Section: Cavitation Effect and Modification Of Turbulence Modelmentioning

confidence: 99%

EHTT2022: Multi-physical modeling and adjusting for ultrasonic assisted soft abrasive flow processing

Tan

2022

Preprint

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The polishing efficiency of the soft abrasive flow (SAF) method is low, which is not in line with the concept of carbon emission reduction in industrial production. To address the above issue, a two-phase fluid multi-physics modeling method for the ultrasonic assisted SAF processing is proposed. The turbulence kinetic energy at different ultrasonic frequencies are studied. Simulation results show that the ultrasonic vibration can induce cavitation effect in the constrained flow channel and promote the turbulence intensity and uniformity of the abrasive flow. A set of comparative polishing experiments with or without ultrasonic vibration are conducted to explore the performance of the proposed method. It can be found that the ultrasonic assisted SAF method can improve the machining efficiency and uniformity, so as to achieve the purpose of carbon emission reduction.

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“…Based on the above research, the multi-body dynamic model is established through a modeling method with Figure 6 Gearbox numerical model mass points and receives the vibration characteristics under the excitation of the load in the sawing process [76][77][78][79]. The sensitivity of different design variables of the new gearbox was determined via a sensitivity analysis of the objective function.…”

Section: Intelligent Multi-body Dynamic Optimizationmentioning

confidence: 99%

Key Technologies and Development Trends in Advanced Intelligent Sawing Equipments

Wang

Zhang

Tan

2021

Chin. J. Mech. Eng.

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As a starting point in equipment manufacturing, sawing plays an important role in industrial production. Intelligent manufacturing equipment is an important carrier of intelligent manufacturing technologies. Due to the backwardness of intelligent technology, the comprehensive performance of sawing equipments in China is obviously different from that in foreign countries. State of the art of advanced sawing equipments is investigated along with the technical bottleneck of sawing machine tool manufacturing, and a new industrial scheme of replacing turning-milling by sawing is described. The key technologies of processing-measuring integrated control, multi-body dynamic optimization, the collaborative sawing network framework, the distributed cloud sawing platform, and the self-adapting service method are analyzed; with consideration of the problems of poor processing control stableness, low single machine intelligence level, no on-line processing data service and active flutter suppression of sawing with wide-width and heavy-load working conditions. Suggested directions for further research, industry implementation, and industry-research collaboration are provided.

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A modal analysis of vibration response of a cracked fluid-filled cylindrical shell

Cited by 45 publications

References 20 publications

Investigation on the flow field regulation characteristics of the right-angled channel by impinging disturbance method

Investigation on the flow field regulation characteristics of the right-angled channel by impinging disturbance method

EHTT2022: Multi-physical modeling and adjusting for ultrasonic assisted soft abrasive flow processing

Key Technologies and Development Trends in Advanced Intelligent Sawing Equipments

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