An Analysis Method of Engine Vibration Excitation Characteristics Based on Unified Mathematical Model
A vibration excitation, mathematical model technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of tedious calculation and analysis, heavy workload, etc.
Active Publication Date: 2015-12-23
TONGJI UNIV
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[0006] From the perspective of traditional modeling and analysis methods, the analysis of the vibration excitation characteristics of the three models requires the application of three different models due to the different layout characteristics. If the vibration excitation characteristics analysis of other types of engines is to continue, more models must be established. Model, the calculation and analysis of performance prediction and scheme comparison are cumbersome and heavy workload
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[0055] Such as Figure 7 As shown, an engine vibration excitation characteristic analysis method based on a unified mathematical model includes the following steps:
[0056] 1) Obtain engine characteristic parameters and engine basic parameters, described engine characteristic parameters include engine cylinder number n, adjacent cylinder center line angle γ and the crank angle of cylinder; Described engine basic parameters include inertial mass m s , crank radius r, crank rotational angular velocity ω and connecting rod length l, where the inertial mass m s Including the mass of piston, piston ring, piston pin and 1 / 4~1 / 3 connecting rod.
[0057] 2) Judge the type of the engine according to the parameters, such as figure 1 As shown, the types of engines include inline engine (figure (1a)), boxer engine (figure (1b)) and V-type engine (figure (1c)).
[0058] 3) if Figure 2-Figure 6 As shown, a mathematical model corresponding to the type of engine is established according...
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The invention relates to an engine vibration excitation characteristic analysis method based on the unified mathematical model. The method comprises the following steps: 1), acquiring an engine characteristic parameter and an engine basic parameter; 2) judging the type of the engine according to the parameter; 3), establishing the mathematical model corresponding to the type according to the type of the engine; and 4), calculating the vibration excitation parameter according to the established mathematical model, and acquiring the vibration excitation characteristic of the engine according to the vibration excitation parameter. Compared with the prior art, the method has the advantages that the efficiency of the early-period development of an automobile is improved, the research and development speed is increased, and the cost is lowered.
Description
technical field [0001] The invention relates to a method for calculating engine characteristics, in particular to an analysis method for engine vibration excitation characteristics based on a unified mathematical model. Background technique [0002] In the research and development of modern cars, in order to meet the needs of different consumers, the same model often needs to be equipped with a variety of different engines. From the perspective of enterprises, in order to save costs, a large number of common components will be used. In the early stage of development, it is often necessary to predict the performance of vehicles equipped with different engines in the digital prototype stage, for example, the vibration isolation performance analysis of the engine mount system to determine the components that can be used and the components that need to be redeveloped. However, the vibration excitation characteristics (such as vibration order, direction and amplitude) of engines ...
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IPC IPC(8): G06F17/50
Inventor 郭荣刘仕伟房怀庆章桐
Owner TONGJI UNIV