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Analysis method for engine crankshaft system torsional vibration

An analysis method and engine technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of not considering the influence of dual-mass flywheel on the crankshaft system, and achieve the effect of optimized design and accurate analysis

Active Publication Date: 2014-10-15
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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AI Technical Summary

Problems solved by technology

Some existing analysis methods regard the crankshaft system at the front end of the flywheel as a rigid body, only analyze the output effect of the secondary flywheel, and do not consider the influence of the dual-mass flywheel on the crankshaft system

Method used

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  • Analysis method for engine crankshaft system torsional vibration
  • Analysis method for engine crankshaft system torsional vibration
  • Analysis method for engine crankshaft system torsional vibration

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0029] Such as figure 1 As shown, an engine crankshaft system torsional vibration analysis method includes the following steps:

[0030] (1) Collect the key parameters of the engine, including: the number of cylinders of the engine, the arrangement, the stroke size, the number of strokes, the length of the connecting rod, the quality of the piston assembly, and the combustion pressure in the next cycle at each speed; construct a three-dimensional model of the crankshaft system, 3D models including crankshaft, shock absorber and flywheel;

[0031] (2) Establish the torsional vibration parameterized equivalent model of the engine crankshaft system in Excite Designer;

[0032] Since the crankshaft system of the engine includes three components, the crankshaft, the shock absorber and the flywheel, the torsional vibration parameterized equivalent m...

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Abstract

The invention discloses an analysis method for engine crankshaft system torsional vibration. The analysis method comprises the following steps: (1) collecting a key parameter of an engine, and constructing a three-dimensional model of a crankshaft system; (2) establishing a parametric equivalent model for the engine crankshaft system torsional vibration; (3) carrying out a torsional vibration calculation to an engine crankshaft system under an action of different revolving speeds and different combustion pressures; and (4) analyzing a result. In an engine designing process, the crankshaft system torsional vibration is analyzed and calculated to quickly confirm an engine crankshaft system torsional vibration situation under various operation working conditions by the analysis method, and an optimal design of the crankshaft system can be realized through parameter optimization. The analysis method for the engine crankshaft system torsional vibration can precisely analyze, the test efficiencies of the engine can be improved, a great quantity of test cost can be safe for a later stage, a direction is pointed for a crankshaft system design, and especially, an effective guidance is provided for matching with the design of a dual-mass flywheel system.

Description

technical field [0001] The invention belongs to the field of computer aided analysis of engine crankshaft system, in particular to an analysis method of torsional vibration of engine crankshaft system. Background technique [0002] The engine crankshaft system is the main system for the engine to output external power. Since the combustion pressure of the engine is constantly changing with the cycle, and all parts of the crankshaft system are flexible bodies, when the engine crankshaft rotates at a high speed, various parts of the crankshaft system will produce large and small Rotational speed fluctuations in different directions, resulting in mutual torsional vibration between various parts of the shafting. The torsional vibration of the crankshaft system has an important impact on all aspects of the performance of the engine, including the stability of the timing system and the performance of the whole machine. If the output torque and speed of the crankshaft system are u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F19/00
Inventor 胡昌良钱多德钱德猛朱凌云路明谈健李波昂金凤王强雷蕾姚炜张超崔宁范习民王军王宏大孙影喻春凤
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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