How to Reduce Aerodynamic Noise and Vibration Transmission in Electric Vehicle Flat Fork Guard Plate Processing?
Publish Time: 2026-05-13
As a crucial protective structure beneath the battery pack, the electric vehicle flat fork guard plate processing not only provides impact protection but also directly contributes to the overall vehicle's aerodynamic performance. During high-speed driving, the high airflow velocity and complex turbulence in the chassis area easily create pressure fluctuations on the guard plate surface, leading to aerodynamic noise and structural vibration, which are then transmitted to the vehicle body, affecting ride comfort.1. Optimize Surface Streamline Structure to Reduce Airflow SeparationOne of the main sources of aerodynamic noise is airflow separation and eddies on the guard plate surface. When high-speed airflow passes over a flat plate structure, if the surface is too flat or has protrusions, it can cause sudden changes in local air pressure, generating broadband noise. Therefore, in the processing of flat fork guard plates, micro-arc surface designs or streamlined transition structures are typically introduced to allow airflow to pass smoothly through the chassis area, reducing eddy current generation. Simultaneously, chamfering and flow guidance optimization of the edge areas can also effectively reduce airflow separation intensity.2. Enhanced Damping Performance Through Multi-Layer Composite StructureVibration transmission originates not only from airflow excitation but is also closely related to the rigidity of the material itself. A single metal structure easily transmits vibration directly to the vehicle body. Therefore, modern skid plate designs often employ composite structures of metal and polymer materials, introducing damping layers through a sandwich design, allowing vibration energy to be absorbed and attenuated step by step during propagation. This structure effectively reduces high-frequency vibration transmission and improves the overall vehicle NVH performance.3. Optimized Rib Layout Reduces Resonance RiskFlat fork skid plates may experience local resonance under high-speed airflow. If the structure's natural frequency is close to the airflow excitation frequency, noise will be significantly amplified. Therefore, during the manufacturing and design phase, a reasonable arrangement of reinforcing ribs can alter the overall stiffness distribution, raising the structure's natural frequency and preventing it from reaching common aerodynamic excitation frequencies. Simultaneously, asymmetrical rib design can effectively disrupt vibration propagation paths and reduce resonance amplification effects.4. Controlled Manufacturing Accuracy Reduces Surface Disturbance SourcesThe surface processing quality of the skid plate significantly impacts aerodynamic performance. If burrs, ripples, or dimensional deviations exist on the surface, they can create tiny disturbance sources in high-speed airflow, inducing localized noise. Therefore, during processing, it is necessary to improve stamping and forming precision and refine the surface through processes such as spraying, polishing, or coating to make the surface smoother and more continuous, thereby reducing airflow disturbance.5. Optimize Installation Connection Structure to Reduce Structural Noise TransmissionBesides the aerodynamic excitation itself, vibrations are also transmitted to the vehicle body through the installation structure. Therefore, flexible pads or rubber vibration isolation structures are typically used at the connection between the flat fork guard plate and the vehicle body to weaken the vibration transmission path. Simultaneously, optimizing the distribution of fastening points to make the stress more uniform can also reduce vibration concentration caused by localized rigid connections.In high-speed aerodynamic environments, reducing aerodynamic noise and vibration transmission in electric vehicle flat fork guard plate processing requires comprehensive improvements in multiple aspects, including streamlined structure optimization, composite damping design, stiffener layout, processing precision control, and vibration isolation installation structures. Only through the synergistic optimization of aerodynamics and structural mechanics can quieter and more stable vehicle operation be achieved.
