Programming calculation method for sectional inertia moment of engine connecting rod

Abstract

The invention relates to the field of engineering design of engine connecting rods, in particular to a programming calculation method for the sectional inertia moment of an engine connecting rod. The method includes: acquiring section shape and size parameters of the connecting rod through measurement; deriving an equation of each line segment of the connecting rod section through geometry; accurately calculating coordinates of transition points of all line segments of the section of the connecting rod through an equation; performing programming calculation on the connecting rod section inertia moment by applying a definite integral approximation principle; the connecting rod section shape and size parameters comprise transition arc radius, connecting rod section height, vertex angle and the like; the problems that in the prior art, calculation of the sectional inertia moment of the engine connecting rod needs to depend on a connecting rod CAD model, the connecting rod CAD model needs to be regenerated when the sectional shape of the connecting rod is changed, and the sectional inertia moment cannot be automatically calculated according to the sectional parameters of the connecting rod are solved. The invention provides a programming calculation method for the sectional inertia moment of an engine connecting rod. The method has the advantages of parameterization and high calculation efficiency.

Description

technical field [0001] The invention relates to the engineering design field of an engine connecting rod, in particular to a numerical method for an arbitrary section moment of inertia of an engine connecting rod. In particular, the invention relates to a programming calculation method for the section moment of inertia of an engine connecting rod. Background technique [0002] Patent Document 1 (CN201510346424.8) discloses a method for calculating the buckling load of a rod under test with elastic constraints at both ends. The method for calculating the buckling load of a rod to be measured with elastic constraints at both ends, wherein the buckling stress of the rod to be measured (1) does not exceed the proportional limit of the material of the rod to be measured, is characterized in that the method includes the following Steps: Step 1: Obtain the material parameters of the rod to be measured (1); Step 2: Calculate the column end rotation constraint of the rod to be measu...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the calculation of the moment of inertia of the engine connecting rod section in the prior art, which needs to rely on the connecting rod CAD model. Automatically calculate the section moment of inertia of the section parameters, and provide a programming calculation method for the section inertia moment of the engine connecting rod

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