CN-121997465-A - I-beam connecting rod section parameter determination method and device, electronic equipment and medium

CN121997465ACN 121997465 ACN121997465 ACN 121997465ACN-121997465-A

Abstract

The invention relates to the technical field of I-beam connecting rods, in particular to a method and a device for determining section parameters of an I-beam connecting rod, electronic equipment and a medium. The method comprises the steps of obtaining an initialization parameter set corresponding to a shaft cross section in a target I-beam connecting rod, calculating initial quality reduction amount and initial safety coefficient corresponding to the target I-beam connecting rod based on the initialization parameter set according to a preset mathematical formula, updating the initialization parameter set based on the initial quality reduction amount and the initial safety coefficient to obtain a plurality of groups of update parameter sets corresponding to the target I-beam connecting rod, verifying each update parameter set, updating each update parameter set based on a verification result to obtain a standby parameter set, and determining the standby parameter set as a final parameter set corresponding to the shaft cross section in the target I-beam connecting rod. The optimization closed loop of the cross section parameters of the whole rod body is completed, the accuracy of the determined cross section parameters of the I-beam connecting rod is ensured, and the engineering practicability of the target I-beam connecting rod is further ensured.

Inventors

XIE YAN
ZENG QINGQIANG
Ran Shaohui
CHENG JIAN

Assignees

重庆长安汽车股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260409

Claims (12)

1. A method for determining parameters of a cross section of an i-beam connecting rod, the method comprising: acquiring an initialization parameter set corresponding to a shaft cross section in a target I-beam connecting rod, wherein the initialization parameter set comprises a plurality of initialization parameters; based on the initialization parameter set, calculating an initial mass reduction amount and an initial safety coefficient corresponding to the target I-beam connecting rod by means of a preset mathematical formula, wherein the mathematical formula comprises at least one of a cross-sectional area calculation formula, a mass calculation formula, a stress calculation formula and a safety coefficient deduction formula; Calculating the quality reduction contribution degree of each initialization parameter in the initialization parameter set to the initial quality reduction amount respectively, and the safety coefficient contribution degree of each initialization parameter to the initial safety coefficient respectively; selecting at least one of the initialization parameters, wherein the quality reduction contribution degree is greater than a preset contribution degree threshold value and/or the safety coefficient contribution degree is greater than the preset contribution degree threshold value, as an updatable core parameter; Updating the initialization parameter set based on each updatable core parameter to obtain a plurality of groups of update parameter sets corresponding to the target I-beam connecting rod, wherein each group of update parameter sets comprises a plurality of update parameters; Verifying each update parameter set, and updating each update parameter set based on a verification result to obtain a standby parameter set; And determining the standby parameter set as a final parameter set corresponding to the cross section of the rod body in the target I-beam connecting rod.
2. The method according to claim 1, wherein the calculating the initial mass reduction amount and the initial safety factor corresponding to the target i-beam link based on the initialization parameter set by means of a preset mathematical formula includes: calculating the initial shaft cross section area corresponding to the target I-beam connecting rod based on the initialization parameter set; The initial mass reduction amount and an initial safety factor are calculated based on the initial shaft cross-sectional area.
3. The method of claim 2, wherein calculating an initial shaft cross-sectional area for the target i-beam link based on the set of initialization parameters comprises: Splitting the initial shaft cross-sectional area into a plurality of sub-cross-sectional area regions based on the initialization parameter set; and calculating the initial shaft cross-sectional area corresponding to the target I-beam connecting rod based on each sub cross-sectional area.
4. The method of claim 2, wherein the initial shaft cross-sectional area includes a plurality of sub-cross-sectional area regions, wherein calculating the initial safety factor based on the initial shaft cross-sectional area includes: Calculating sub-moments of inertia corresponding to the sub-cross-sectional area areas; calculating a total moment of inertia corresponding to the initial shaft cross-sectional area based on each of the sub-moments of inertia; The initial safety factor is calculated based on the total moment of inertia.
5. The method of claim 4, wherein said calculating said initial security coefficient based on said total moment of inertia comprises: Calculating the compression stress in the swing plane and the compression stress in the vertical swing plane corresponding to the target I-beam connecting rod based on the total inertia moment; Based on the compressive stress in the swinging plane, calculating a safety coefficient in the swinging plane corresponding to the target I-beam connecting rod; based on the compressive stress in the vertical swing plane, calculating a safety coefficient in the vertical swing plane corresponding to the target I-beam connecting rod; and calculating the initial safety coefficient based on the safety coefficient in the swinging plane and the safety coefficient in the vertical swinging plane.
6. The method of claim 1, wherein verifying each of the update parameter groups and updating each of the update parameter groups based on a verification result to obtain a backup parameter group comprises: Calculating an update quality reduction amount and an update safety coefficient corresponding to each update parameter group; Detecting whether the updated safety coefficient corresponding to each updated parameter set meets a preset safety coefficient threshold value or not; if the updated safety coefficient meets the preset safety coefficient threshold value, the updated parameter set is used as a candidate parameter set; and adjusting each candidate parameter set to obtain the standby parameter set.
7. The method of claim 1, wherein determining the set of backup parameters as the set of final parameters corresponding to the shaft cross-section in the target i-beam link comprises: constructing a connecting rod finite element strength analysis model based on the standby parameter set, and calculating the strength corresponding to the target I-beam connecting rod constructed based on the standby parameter set; based on the standby parameter set, a buckling analysis model is established, and buckling corresponding to the target I-beam connecting rod constructed based on the standby parameter set is calculated; Constructing a connecting rod finite element strength analysis model based on the standby parameter set, and calculating the dynamic oil film thickness corresponding to the target I-beam connecting rod constructed based on the standby parameter set; Constructing a connecting rod constraint buckling mode model based on the standby parameter set, and calculating a buckling mode corresponding to the target I-beam connecting rod constructed based on the standby parameter set; detecting whether the strength, the buckling, the dynamic oil film thickness and the buckling mode all meet corresponding preset requirements; And if the strength, the buckling, the dynamic oil film thickness and the buckling mode all meet the corresponding preset requirements, determining the standby parameter set as a final parameter set corresponding to the cross section of the rod body in the target I-beam connecting rod.
8. The method of claim 7, wherein the method further comprises: If at least one of the strength, the buckling, the dynamic oil film thickness and the buckling mode does not meet the corresponding preset requirements, the standby parameter set is adjusted based on a detection result; Until the strength, the buckling, the dynamic oil film thickness and the buckling mode obtained by calculation after calculation and adjustment all meet corresponding preset requirements, obtaining a target parameter set; and determining the target parameter set as a final parameter set corresponding to the cross section of the rod body in the target I-beam connecting rod.
9. An i-beam link cross-section parameter determination apparatus, the apparatus comprising: The system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring an initialization parameter set corresponding to a shaft cross section in a target I-beam connecting rod, and the initialization parameter set comprises a plurality of initialization parameters; The calculation module is used for calculating the initial mass reduction amount and the initial safety coefficient corresponding to the target I-beam connecting rod based on the initialization parameter set and by means of a preset mathematical formula, wherein the mathematical formula comprises at least one of a cross-sectional area calculation formula, a mass calculation formula, a stress calculation formula and a safety coefficient derivation formula; The system comprises a first updating module, a plurality of updating parameter groups, a first updating module, a second updating module, a first updating module and a second updating module, wherein the first updating module calculates the quality reduction contribution degree of each initializing parameter in the initializing parameter groups to the initial quality reduction amount respectively and the safety coefficient contribution degree of each initializing parameter to the initial safety coefficient respectively; The second updating module is used for verifying each updating parameter set and updating each updating parameter set based on a verification result to obtain a standby parameter set; and the determining module is used for determining the standby parameter set as a final parameter set corresponding to the cross section of the rod body in the target I-beam connecting rod.
10. An electronic device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the i-beam link cross-section parameter determination method of any one of claims 1 to 8.
11. A computer-readable storage medium having stored thereon computer instructions for causing a computer to perform the i-beam connecting rod section parameter determination method of any one of claims 1 to 8.
12. A computer program product comprising computer instructions for causing a computer to perform the i-beam link section parameter determination method of any one of claims 1 to 8.

Description

I-beam connecting rod section parameter determination method and device, electronic equipment and medium Technical Field The invention relates to the technical field of I-beam connecting rods, in particular to a method and a device for determining section parameters of an I-beam connecting rod, electronic equipment and a medium. Background After the vehicle engine is upgraded in the mixing and range-extending directions, the requirements on energy conservation, emission reduction and light weight of the whole vehicle are more severe, and meanwhile, the cylinder pressure is increased, the length of a connecting rod is increased, the running environment of the connecting rod is obviously deteriorated, and the balance difficulty of light weight and reliability is greatly improved due to the application of technologies such as lean combustion, long travel and the like of the engine. The size head of the connecting rod is limited in light weight allowance, the rod body is used as a mass sensitive area, the structural size and the cross section area of the I-beam become the core of light weight design, and the maximum weight reduction is realized through optimization, and fatigue durability and other damages caused by excessive light weight are avoided. In the prior art, the joint strength simulation optimization is generally carried out by establishing a connecting rod equivalent simplified model, but the simplified model is easy to cause rigidity and mass matrix errors to influence calculation accuracy, so that the determined I-beam connecting rod section parameters are inaccurate, and the engineering practicability is influenced. Therefore, how to ensure the accuracy of the determined section parameters of the I-beam connecting rod, and further ensure the engineering practicability, becomes a problem to be solved urgently. Disclosure of Invention The invention provides a method, a device, electronic equipment and a medium for determining section parameters of an I-beam connecting rod, which are used for solving the problem of how to ensure the accuracy of the determined section parameters of the I-beam connecting rod and further ensure the engineering practicability. The invention provides a method for determining section parameters of an I-beam connecting rod, which comprises the steps of obtaining an initialization parameter set corresponding to a rod section in a target I-beam connecting rod, wherein the initialization parameter set comprises a plurality of initialization parameters, calculating initial mass reduction and initial safety coefficients corresponding to the target I-beam connecting rod based on a preset mathematical formula, wherein the mathematical formula comprises at least one of a section area calculation formula, a mass calculation formula, a stress calculation formula and a safety coefficient derivation formula, updating the initialization parameter set based on the initial mass reduction and the initial safety coefficients to obtain a plurality of update parameter sets corresponding to the target I-beam connecting rod, verifying each update parameter set based on a verification result to obtain a standby parameter set, and determining the standby parameter set as a final parameter set corresponding to the rod section in the target I-beam connecting rod. The method for determining the parameters of the cross section of the I-beam connecting rod provided by the embodiment of the application obtains the initialization parameter set corresponding to the cross section of the rod body in the target I-beam connecting rod. And (3) defining an initial geometric parameter reference of the I-beam connecting rod body section design, providing basic data support for all subsequent performance calculation and parameter optimization, defining an initial range of parameter optimization, and ensuring that the subsequent process has a clear calculation and adjustment object. Based on the initialization parameter set, calculating an initial mass reduction amount and an initial safety coefficient corresponding to the target I-beam connecting rod by means of a preset mathematical formula, wherein the mathematical formula comprises at least one of a section area calculation formula, a mass calculation formula, a stress calculation formula and a safety coefficient deduction formula. The method realizes the light weight and strength dual-target quantitative evaluation of the initialization parameter set, obtains initial reference values of two core targets, provides comparison reference for subsequent parameter updating and optimization, and determines the optimization direction of parameter adjustment (improving the quality reduction amount and ensuring the safety coefficient to reach the standard). And updating the initialization parameter set based on the initial mass reduction amount and the initial safety coefficient to obtain a plurality of groups of update parameter sets corresponding to the target I-bea