Design optimization method and optimization device of power assembly mounting system

A powertrain and mounting system technology, applied in the power field, can solve problems such as the inability to achieve optimal mounting performance optimization

Active Publication Date: 2012-07-25
BAIC MOTOR CORP LTD
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  • Abstract
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a design optimization method and an optimization device for a powertrain

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  • Design optimization method and optimization device of power assembly mounting system
  • Design optimization method and optimization device of power assembly mounting system
  • Design optimization method and optimization device of power assembly mounting system

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Embodiment Construction

[0025] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0026] An embodiment of the present invention provides a design optimization method for a powertrain mount system, such as figure 1 shown, including:

[0027] Step 101, establish the differential equation of the space six degrees of freedom vibration model of the powertrain mount system according to the force analysis model,

[0028] M is the mass matrix of the powertrain mount system, C is the damping matrix of the powertrain mount system, K is the stiffness matrix of the powertrain mount system, q is the generalized coordinate column vector, {F(t)} is The column vector of the excitation force on the powertrain suspension system, is the first derivative of the generalized coordinate column vector, is the second derivative of the generalized coord...

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Abstract

The invention provides a design optimization method and an optimization device of a power assembly mounting system. The design optimization method comprises the steps of establishing a differential equation of a space six-freedom degree vibration model of the power assembly mounting system; analyzing to obtain an inherent frequency, an inherent vibration mode and vibration energy coupling among six freedom degrees according to inherent characteristics of the differential equation for the power assembly mounting system; establishing a multiple target optimization function of the power assembly mounting system according to each order inherent frequency, inherent vibration mode and vibration energy coupling; and carrying out optimization design with a particle swarm optimization algorithm. A dynamical model and the optimization function of the power assembly mounting system are established, the multiple target optimization function with reasonable distribution of mounting modal frequency and decoupling degree of energy as targets is determined, and a parallel optimization multiple target algorithm is subsequently adopted to obtain a multiple target optimization scheme set of the power assembly mounting system so that the designed power assembly mounting system can best meet the performance requirements of energy decoupling and modal distribution.

Description

technical field [0001] The invention relates to power technology, in particular to a design optimization method and an optimization device for a power assembly suspension system. Background technique [0002] The noise and vibration (NVH, Noise, Vibration & Harshness) performance of automobiles has become an important part of the vehicle technology level, and people are also putting forward higher and higher requirements for the NVH of the whole vehicle. The engine is the most important source of vibration and noise of the vehicle, and the mount is the vibration system connecting the engine and the chassis, which plays a very important role in the NVH of the vehicle. The NVH performance of the whole vehicle can be improved to a large extent by optimizing the design of the suspension system. [0003] In the prior art, most suppliers or university scientific research institutes use Adams and other multi-body dynamics software or Matlab mathematical software as tools to study ...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李波鲁平汤林生叶子青
Owner BAIC MOTOR CORP LTD
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