It was identified that the blocked force was predicted even after the change of the receiver’s subsystem because it was independent of the connection characteristics (Fig. 12). On the contrary, the contact force was difficult to apply to a new subsystem because it was related to the connection characteristics of the existing simplified subsystem. Through comparison of these two force transmissibility ratios, it was determined which part to improve or replace. For example, at 127 Hz, since the transmissibility ratios of the transmitted force was large, it was necessary to improve the frame. On the contrary, it was found that it was effective to improve the subframe or bush at 57 Hz.
The Most Effective Noise Reduction Methods for Your Home
In terms of the fixed sections, the distance between the pedals in the front axle was fixed. Toyota’s modular platform fixed the length of the underbody and focused on applying standard parts within the underbody. It is characterized by standardizing large parts that have excellent commonization deployment effects such as engines, transmissions, and suspension parts. In order to maximize these advantages, it is necessary to convert the results of previously developed common parts into databases and use them in the preliminary stage of vehicle development.
1. Vibration Characteristics of Water Elbow
In addition, SBD builds feasible sets by integrating the space considered by each team. And SBD derives results by gradually narrowing the established sets through inter-team communication. Furthermore, uncertainty according to the process progress is controlled through these sets.
Wind Turbine Resonance Control Device with Rotating Vibration Sensor and Adjustable Blade Angle Mechanism
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- The underlying physical mechanism for the formation of multiple ultra-wide band gaps is revealed through novel vibration modes from finite element analyses.
- Vibrational energy is problematic for a variety of reasons; it can make appliances such as washing machines, blenders, vacuums noisy and disruptive for users.
- Consider factors such as motor size, energy efficiency ratings, and the features included in the design to determine which model best meets your needs.
- Studies have been conducted on the product development process to respond quickly to the market.
Therefore, it is necessary to examine the applicability of ANN to predict data that is not in the database when improving parts in the concept development stage of the vehicle development stage. If it is possible to learn using ANN and predict new improvement plans in advance, efficient improvement in product development time and effort is expected. If the improvement of subsystem is preemptively predicted in the concept stage from the perspective of vehicle characteristics, it is expected that the time and effort of detailed-level design and performance verification stage are reduced. Additionally, it is found that at a certain BG, the deformation mechanism of the unit cell remains consistent for both global and local modes across all points of the IBZ, ensuring functionality in all three directions.
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At present, the main calculation methods include the transfer matrix method, plane wave expansion method, finite difference time domain method, multiple scattering method, and concentrated mass method. Phononic crystals are periodic coincidence materials or structures with elastic wave band gaps and can be regarded as an extension of the crystal concept in solid state physics. In essence, the study of phononic crystals is to study elastic wave propagation in periodic inhomogeneous media [9, 10]. Therefore, the lattice and band theory in elastic dynamics and solid state physics is the theoretical basis of phononic crystals. (a) Numerical model of metastructure with input (cyan) and different output probes representing the Γ-X direction and an inclined direction near Γ-M path.
- The displacement fields at these two frequencies, which exhibit similar transmission loss values of approximately − 350 dB, are largely analogous.
- However, the numerical model with the linear solid viscoelastic model in both directions eliminates the flat passbands existing in the linear elastic model in both directions as presented in Fig.
- These and other approaches focus on practical implementations that can be integrated into both new and existing turbine designs to extend component life while reducing acoustic emissions.
Figure 7.
However, the asymmetric structure generates an unbalanced magnetic force (UMF), which results in vibration and noise problems. In discover ProGorki movable floor systems , the vibration and noise of the motor are analyzed and optimized. First, the radial pressure is analyzed, and an optimized structure is proposed. The electromagnetic performance of the motor before and after optimization is analyzed using the finite element method. Second, a three-dimensional model is established, and modal analysis is conducted considering the orthotropy of the stator and effective windings.
2.2. Effect of Fluid Parameters on the Acoustic Field
Environmental factors like hard surfaces around the pump can amplify noise by reflecting and intensifying sound waves. Noise reduction is an essential part of creating comfortable, functional, and healthy environments. By understanding the basics of noise reduction calculation—such as transmission loss, the mass law, NRC, and reverberation time—you can make informed decisions about how to minimize unwanted sound in different settings. Whether you’re designing a quiet backyard, an efficient office, or a soundproof recording studio, these principles will guide you in creating a quieter, more pleasant environment. Materials used for damping must not only reduce noise and vibration but must be able to withstand heat. In this article, we will further explore the significance of damping and the techniques for noise and vibration control that manufacturers must take into account.
Choose Dense Materials Like Composite or Vinyl Panels
