Engine crankshaft dynamic analysis method
A technology of dynamic analysis and analysis method, which is applied in the field of engine crankshaft dynamic analysis, and can solve problems such as lengthening the development cycle and increasing costs
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[0021] The analysis method of the present application will be further described in conjunction with the accompanying drawings.
[0022] 1. Mesh division:
[0023] 1.1 Mesh division of crankshaft system
[0024] When meshing the crankshaft system, in order to ensure the smooth progress of the dynamic analysis of the crankshaft system and high calculation accuracy, it is necessary to ensure sufficient mesh accuracy at the fillet, as shown in Figure 1. Due to the large model of the crankshaft system and many calculation conditions, the calculation of the crankshaft system adopts the substructure analysis method, that is, the modal compression method.
[0025] 1.2 Simple main bearing wall finite element model
[0026] The simple main bearing wall FE model adopts hexahedral mesh, and the number of unit layers in the main bearing wall hole is required to be the same as that on the crankshaft main journal, which must be equally divided and equally spaced. as shown in picture 2.
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