Design Criterion of Damper Component of Passive-Type Mount Module without Using Base Mass-Block

Kim, Chan-Jung

doi:10.3390/en11061548

Cited by 5 publications

(16 citation statements)

References 25 publications

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“…system including the MIMM. The original system model was consistent with those developed in previous studies [23,24]. However, the target system model is an extended version derived from the original by incorporating variable stiffness and damping coefficients in both the upper and lower sub-mounts, as illustrated in Figure 1.…”

Section: Evaluation Strategy For Mimm At Electric Power Generatormentioning

confidence: 97%

“…The experimental frequency response function between the target electric power plant and the mass block was used to update the constructed 3-d.o.f. model in Figure 3, and the detailed selection of the system parameters is explained in an earlier study [23]. A summary of the current system model is listed in Table 1.…”

Section: B + C M (∆)mentioning

confidence: 99%

“…Table 1. Specifications of the theoretical power plant model [23]. The solution for the three displacement variables can be effectively obtained through Fourier transforms, therein the variable 's' is substituted with 'jω' in the Equations ( 1)-( 3) originally formulated in the Laplace domain.…”

Section: B + C M (∆)mentioning

confidence: 99%

“…Alternatively, the viscous damping coefficient can be derived from the high-damping material itself, such as rubber or engineering plastic. Therefore, the mount module can be formulated with several sub-mounts, both spring and damper, and the mass block can be integrated with sub-mounts [23]. This type of mount module is defined as a mass-block integrated mount module (MIMM).…”

Section: Introductionmentioning

confidence: 99%

“…An electric power plant manufactured by the DAEHUNG Electric Machinery Company in South Korea was selected as an example for the modeling of a supported system. The electric power plant was set to generate 750 kW, using a V-type 12-cylinder combustion engine, and operate at a rated speed of 1800 rev/min [23]. The configuration of the overall electric power plant is illustrated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

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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: Evaluation Strategy For Mimm At Electric Power Generatormentioning

confidence: 97%

Section: B + C M (∆)mentioning

confidence: 99%

Section: B + C M (∆)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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Compromised Vibration Isolator of Electric Power Generator Considering Self-Excitation and Basement Input

Park

Kim

2023

Inventions

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A previous study proposed an optimal vibration isolator for self-excitation, but the solution results showed a critical drawback for the basement input. Because the plant system is exposed to self-excitation and basement input, the vibration isolator characteristics must meet all the requirements of both excitation cases. Two performance indices of the vibration isolator were introduced to evaluate the vibration control capability over two excitation cases, self-excitation and basement input, using the theoretical linear model of the electric power generator. The compromise strategy was devoted to enhancing the vibration control capability over the basement input, owing to the acceptable margin for self-excitation. The modification of the mechanical properties of the vibration isolator focused on the isolator between the mass block and the surrounding building. Simulation results revealed that an increase in the spring coefficient and a decrease in the damping coefficient of the vibration isolator beneath the mass block could enhance the vibration reduction capability over the basement input.

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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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Design Criterion of Damper Component of Passive-Type Mount Module without Using Base Mass-Block

Cited by 5 publications

References 25 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

Compromised Vibration Isolator of Electric Power Generator Considering Self-Excitation and Basement Input

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

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