Systemic solutions
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Automobile Industry
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Low Noise Solution For Intake And Exhaust Systems
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Interior Product Performance Optimization And Cost Reduction Solutions
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Low Noise Solution For Hydrogen Fuel Cell System
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Low Noise Solution For Vehicle Electric Drive System
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Low Noise Solution For Vehicle Air Conditioning System
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Vehicle Damping Layout Optimization And Lightweight Solutions
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Aviation Industry
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Material Industry
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Other Industry
Vehicle damping layout optimization and lightweight solutions
1. Background introduction
1.1 Introduction to damping materials used on the vehicle and existing problems:
· Damping used in the entire vehicle: butyl damping, asphalt damping, LASD, etc.;
· Existing problems:
· Damping application location, application area; under normal circumstances, the damping application is excessive;
· How to effectively adjust the amount of damping , weight and NVH performance to optimize configuration and optimize weight reduction and cost reduction?
Vehicle damping layout and damping types
1.2 Introduction to conventional vehicle damping layout and optimization methods
· How to effectively combine the damping material characteristics to optimize the damping layout modeling of the entire vehicle?
· Introduction to the differences between the conventional damping layout optimization method and the method jointly launched by BOACH/MSC.
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Comparative item |
Traditional body damping modeling method |
New technology of damping identification modeling based on BOACH |
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Damping material property description |
Considering only the damping mass (NSM), the modal damping ratio |
Material damping coefficient as a function of frequency |
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Damping material location description |
The dissipative characteristics of the material are reflected in the global parameters of the model and are not accurately positioned. |
The dissipative properties of the material are precisely located in the distributed area |
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Damping material thickness description |
Do not simulate solid volume |
Damped solid volume, including shape and thickness, through finite element simulation |
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Simulation tools |
Nastran or Altair Opstruct |
Nastran + Actran |
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Applicability to optimization processes |
A certain degree of optimization can be done, but local optimization of damping cannot be carried out to achieve weight reduction or NVH performance improvement. |
Using Actran with API programming and optimization algorithms, you can design optimization work regarding position, thickness, materials, etc. |
2. BOACH acoustic vehicle damping layout optimization and lightweight forward design and development solutions:
· Identify material types : 1) asphalt damping; 2) nitrile rubber damping; 3) water-based damping; 4) automotive rubber.
· Damping layout optimization goals :
· Conduct lightweight design analysis of the entire vehicle based on the perspective of NVH performance evaluation;
· Develop automated command flow based on ACTRAN to realize automatic optimization of damping layout, and conduct performance verification through testing methods.
3. BOACH acoustic car parts material loss factor detection and performance optimization solutions:
· Evaluation of vibration reduction and sound insulation performance of laminated damping steel plate or laminated glass structure (refined CAE model construction)
· Acquire CAE modeling steel plate output parameters by detecting the Young's modulus and loss factor of the base steel plate;
· Through the Young's modulus of the damping material Detect the Young's modulus and the loss factor that changes with frequency to obtain the definition parameters of the damping material;
· Define the mechanical performance parameters of the glass in the CAE model by testing the Young's modulus of the glass substrate.
4. Application cases of BOACH acoustic damping material detection and systematic optimization solutions:
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