Simultaneous topology optimization of supporting structure and loci of isolators in an active vibration isolation system

Zhou, Pingzhang; Du, Jiuyu; Li, Zhenhua

doi:10.1016/j.compstruc.2017.09.006

Cited by 17 publications

(7 citation statements)

References 35 publications

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“…An active-type mount module is advantageous for controlling the mechanical properties as much as possible for different operational conditions, or supporting payloads such that optimal vibration control can be achieved using an efficient control strategy [7][8][9][10]. However, the primary concern for the active-type mount is the fail-safe solution or rigorous system identification, including the actuating mount itself [11][12][13][14][15][16]. The increasing cost of installation or monitoring systems is another hurdle for popular applications.…”

Section: Introductionmentioning

confidence: 99%

Tuning of Two Sub-Mounts in Mass-Block Integrated Mount Module over Self-Excitation and Basement Input

Kim,

Kim

2023

Applied Sciences

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If an unexpected vibration or force is expected to be generated during operation, a vibration mount must be installed beneath the support system. A mass-block can be considered to reduce the structure basement fundamental frequency of the basement. Thus, the efficiency of a single-mount or mass-block can be enhanced by implementing a single-mount module called a mass-block integrated mount module (MIMM). This study addressed the tuning process of multiple mount modules in a supported system by evaluating the mount module using the proposed total performance index, building on a previous evaluation method comprising the first and second performance indices. This index was subsequently applied to assess the control capability of MIMM concerning both the self-excitation of an electric power plant and basement input. The extended 3-degrees-of-freedom (3-d.o.f.) electric power generator model was applied to determine the best selection of the mechanical properties for the MIMM over the various mechanical parameter settings (ranging between 10 and 1000% of the original parameters) of the two sub-mounts. The simulation results demonstrate a reduction in the total performance index from 8.2, as calculated in a previous study, to 0.2. The novelty of the optimal MIMM conditions is confirmed by the simultaneous enhancement of both performance indices.

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Section: Introductionmentioning

confidence: 99%

Tuning of Two Sub-Mounts in Mass-Block Integrated Mount Module over Self-Excitation and Basement Input

Kim,

Kim

2023

Applied Sciences

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“…Within the operational processes of each subcomponent, the mount module tries to mitigate the interference among adjacent subcomponents to the greatest possible extent and minimizes the reactive forces generated during operation, thereby favorably securing the desired dynamic characteristics. Mount modules can be categorized into 'passive' [12][13][14][15][16], 'semi-active' [17][18][19][20], and 'active' [21][22][23][24][25] types based on their operational modes. Passive mounts can encompass a diverse range of forms, such as those utilizing the elasticity of rubber or polyurethane or incorporating geometrically structured coil springs or air springs.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Supporting Mounts of a Three-in-One Electric Drive Unit Using a Hybrid Simulation Model

Park,

Kim,

Kang

2023

Machines

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The 3-in-1 electric drive unit (EDU) has the advantage of increasing the motor size for a larger output, and the reducer can be a compact layout designed to incorporate three key components—the drive motor, inverter, and reducer—into a single main body. This paper explores a hybrid simulation model for a 3-in-1 electromechanical drive unit (EDU) and its supporting components, consisting of the gear drive unit (GDU) mount, the motor mount, and the roll rod mounts. The synthesis of these sub-components, including the 3-in-1 EDU itself, the three supporting mount modules, and a rigid-body finite element model, is presented. The dynamics of the 3-in-1 EDU were determined through an experimental modal test. Meanwhile, the dynamic stiffness and damping coefficients of the three supporting mounts were measured using an elastomer tester across a frequency range from 10 Hz to 1000 Hz. To evaluate the sensitivity of each mount, the total spectral responses of the 3-in-1 EDU were compared under a torque input, considering rigid connections for each mount in contrast to their original dynamic stiffness. Through installing a rollrod mount, the optimal rigid connection was identified to control the dynamic response of the 3-in-1 EDU hybrid model. Furthermore, simulation results for the rigid connections in each mount were validated against experimental findings, confirming that the rigid rollrod mount configuration provided the best results.

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“…There is more design space and degrees of freedom compared with size optimization and shape optimization, which is a hot research direction of structural optimization [22]. Through topology optimization, the structural form of the vibration isolation system can be changed to reduce the vibration transmission [23,24].…”

Section: Introductionmentioning

confidence: 99%

Vibration Analysis and Parameter Optimization of the Longitudinal Axial Flow Threshing Cylinder

Wang

et al. 2021

Symmetry

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The longitudinal axial flow threshing cylinder of the full feeding rice combine harvester is widely used in China and works with violent vibration. To explore the source of the excitation affecting the vibration and to reduce the vibration, a finite element modal analysis and multipoint input and multipoint output (MIMO) modal test were performed to solve the natural vibration characteristics. By analyzing the excitation frequency, we concluded that the main reason for the resonance was the coupling between the rotation frequency of the threshing cylinder and the first natural frequency. To avoid the influence of resonance and realize a lightweight design, we proposed a combination of size optimization and topology optimization. The second rotation orthogonal combination test was designed to analyze the first natural frequency, maximum stress, and maximum deformation of the threshing cylinder, and the threshing cylinder was reconstructed as a central symmetrical structure to balance the rotational inertia force. The field experiment results showed that the amplitudes of the optimized threshing cylinder were significantly lower than those of the original threshing cylinder. This study provides ideas for solving the vibration characteristics of rotating parts and provides an important reference for the design of vibration reduction and weight reduction of key parts in the field of agricultural machinery.

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Simultaneous topology optimization of supporting structure and loci of isolators in an active vibration isolation system

Cited by 17 publications

References 35 publications

Tuning of Two Sub-Mounts in Mass-Block Integrated Mount Module over Self-Excitation and Basement Input

Tuning of Two Sub-Mounts in Mass-Block Integrated Mount Module over Self-Excitation and Basement Input

Evaluation of the Supporting Mounts of a Three-in-One Electric Drive Unit Using a Hybrid Simulation Model

Vibration Analysis and Parameter Optimization of the Longitudinal Axial Flow Threshing Cylinder

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