Method for predicting rigid body modal based on cooling module shock pad compression amount model

A cooling module, rigid body modal technology, applied in vehicle suspension/shock absorber testing, measuring device, elasticity testing, etc., can solve problems such as large errors, avoid resonance, quickly guide product development, and avoid analysis errors. Effect
CN113252259APending Publication Date: 2021-08-13JIANGLING MOTORS
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
JIANGLING MOTORS
Publication Date
2021-08-13

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Abstract

The invention belongs to the field of automobile vibration and noise control (NVH), and particularly relates to a method for predicting rigid body modal based on a cooling module shock pad compression amount model. Based on the actual equivalent dynamic stiffness and the actual mass of the dynamic model, the rigid body modal of the dynamic model can be calculated, and rigid body modal analysis errors caused by inaccurate input dynamic stiffness are effectively avoided. According to the determination of the rigid body modal prediction method based on the cooling module shock pad compression amount model, the risk of resonance caused by vehicle idle speed coupling can be avoided, a judgment basis is provided for vehicle development, and product development is rapidly guided.
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Description

technical field

[0001] The invention belongs to the field of automobile vibration and noise control (NVH), and in particular relates to a method for predicting a rigid body mode based on a cooling module shock pad compression model. Background technique

[0002] For the structural NVH requirements of the cooling system, the rigid body mode of the cooling module belongs to the object of our key assessment. The rigid body mode of the cooling module involves excitation coupling between the cooling system, the engine and the fan, which can easily lead to vibration of the whole vehicle.

[0003] The rigid body mode of the cooling module is mainly determined by the quality of the cooling module and the rubber dynamic stiffness of the shock pad. However, the dynamic stiffness of the cooling module is often related to the preload force and vibration amplitude. In the early stage of project development, by using the mass of the cooling module as the preload, there are large errors i...

Claims

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