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HSEA MODEL
CREATTION

From Model Creation to Operation

About HSEA Model

Hybrid SEA Model(HSEA Model)

Analytical SEA Model

SEA model created using the theoretical formula of SEA based on the material information of panels and soundproof materials

Analytical SEA Model

Experimental SEA model

SEA model that has adjusted SEA parameters to describe the transfer function measured by speaker / hammer excitation

Experimental SEA model

Various contents can be accurately analysed by combining the 2 models.

Role of HSEA Model

Use the Statistical Energy Analysis (SEA) model to calculate useful outputs for a variety of inputs

Imput Example
  • Road noise
  • Engine noise
  • Gear/motor noise
  • Wind noise
  • On Road Driving noise
  • Clutch noise
  • Power seat noise
HSEA model
Output Example
  • Sound Pressure Level(SPL)
  • Vibration Velocity Level(VVL)
  • Contribution
  • Power Flow
Advantages of the HSEA model

It is possible to investigate the effects of soundproof materials modification and create specification proposals to achieve the target performance with hight accuracy and without additional experiments.

Experimental man-hours and costs significant reductions are possible

Model creation

Analytical SEA Model

Analytical SEA Model

Experimental SEA model

Experimental SEA model

Design Modification Process
(DM experiment)

Compare the changes in specification modification between model predictions with experiment
 - Removal of soundproof material
 - Adding soundproof material
 - Leak masking

Example: Floor carpet removal

Design Modification Process(DM experiment)

Guaranteed accuracy of
HSEA models

Final HSEA model
completed

Final HSEA modelcompleted

Experimental SEA model (Overview)

➀ TDLF and ➁ CLF are adjusted to experimental results in Experimental SEA model

➀ TDLF

Determined by the magnitude of decay of Energy with respect to time.

① TDLF

➁ CLF

Determined by multiple transfer function measurements. Model is performed by extracting only the direct components (= indirect component removal)

② CLF

Experimental SEA model (excitation experiment and sensors)

Speaker
Excitation

Speaker Excitation

Measurement data

・Acoustic-acoustic transfer function
・Acoustic-Vibration transfer function

Hammer
Excitation

Hammer Excitation 01

Measurement data

・Acoustic-acoustic transfer function

Hammer Excitation 02

Measurement data

・Acoustic-acoustic transfer function
・Acoustic-Vibration transfer function

Speaker, hammer, interior/exterior microphones, accelerometer photo

Speaker, hammer, interior/exterior microphones, accelerometer photo

Example:
Number of sensors
(Vehicle model: K and A created in 2020)」
 Microphones: 131 (inside: 39, outside: 92)
 Accelerometers: 259

Analytical SEA model and experimental SEA model

Important features of the HSEA model
Allows performance evaluation on the entire vehicle body of specification changes

The following methods are used to evaluate the performance of the entire vehicle body by combining the analytical SEA model with the experimental SEA model.

Example: Modification of Dash insulator specification

1. Calculate the parameters before and after the specification change using the analytical SEA model.

Calculate the parameters before and after the specification change using the analytical SEA model.

Predicted parameters of the experimental SEA model after specification changes.

Predicted parameters of the experimental SEA model after specification changes.

DM experiment

Example:
Comparison of SPL in vehicle before and after removal of the dash insulator

Comparison of SPL in vehicle before and after removal of the dash insulator 01

Comparison of SPL in vehicle before and after removal of the dash insulator 02

Confirmation that the amplitude of worsening with insulator removal is predictable.

Guaranteeing accuracy of HSEA model by DM experiment

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