CN113204833B - Transmission design system - Google Patents
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- CN113204833B CN113204833B CN202110484573.6A CN202110484573A CN113204833B CN 113204833 B CN113204833 B CN 113204833B CN 202110484573 A CN202110484573 A CN 202110484573A CN 113204833 B CN113204833 B CN 113204833B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/02—Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/04—Ageing analysis or optimisation against ageing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a transmission design system, which relates to the technical field of mechanical design and comprises a parameter input module, a transmission ratio analysis module, a material analysis module, a load analysis module, a shaft analysis module, a result output module and a processor, wherein the parameter input module is used for inputting a parameter of a transmission ratio; analyzing the load file through a load analysis module according to the load file information input by the parameter input module; analyzing the basic information of the material through a material analysis module so as to obtain the reliability of the material; analyzing the transmission data of the shaft through a transmission analysis module so as to obtain the transmission ratio data of the multi-stage shaft; the shaft parameters are analyzed through the shaft analysis module, so that the deformation coefficient and the vibration coefficient of the shaft are obtained, the design result can be simulated according to different data before formal transmission design is carried out, reference is provided for design work, and the transmission design efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of mechanical design, and particularly relates to a transmission design system.
Background
The helicopter is one of the unique creations of 20 th century aviation technology, has the flight characteristics of fixed-wing aircrafts and other aircrafts, and is widely applied to multiple fields of military transportation, patrol, tourism, rescue and the like. The transmission system is one of three key moving parts of the helicopter, and the performance of the transmission system directly influences the performance and reliability of the helicopter. Practice shows that the development period of the transmission system is long, the technical difficulty is high, and the performance quality of the transmission system directly influences the success or failure and the performance level of helicopter development.
Patent document CN110276130B discloses a modeling design system and method for a transmission system, which realizes the construction of a two-dimensional topological model of the transmission system by using component-based drag modeling to determine the topological relation between units from power input to power output in the conceptual design stage of the transmission system. In the transmission system concept design stage, under the condition of not considering the space layout and the structural constraint of the system, the transmission series and the transmission form of the transmission system are determined, a topological structure model of the transmission system is established, and the transmission ratio distribution and the power flow calculation of the transmission system are carried out on the basis. The system and the method can quickly obtain the initial configuration scheme of the transmission system, remarkably improve the design efficiency of the transmission system and lay a foundation for the detailed design of the transmission system.
In the prior art, when a transmission system is designed, people often experience and continuously adjust the transmission system in the design process, the process is time-consuming and labor-consuming, the design efficiency of the transmission system is influenced, and in order to solve the problems, the transmission design system is provided.
Disclosure of Invention
It is an object of the present invention to provide a transmission design system.
The technical problem to be solved by the invention is as follows: how to simulate the transmission design result before formally carrying out the transmission design and obtain reference data, thereby providing enough reference for the transmission design and improving the design efficiency.
The purpose of the invention can be realized by the following technical scheme: the transmission design system comprises a parameter input module, a transmission ratio analysis module, a material analysis module, a load analysis module, a shaft analysis module, a result output module and a processor;
the parameter input module is used for inputting load file information, material basic information, transmission data of a shaft and shaft parameters;
the load analysis module is used for analyzing the load file information, and the specific analysis process comprises the following steps:
step Z1: continuously counting the input load file information;
step Z2: generating a load spectrum according to the processed load file information;
step Z3: a gear load analysis unit which guides the load spectrum into a load analysis module;
step Z4: obtaining a gear contact equivalent load value ZJ and a gear bending equivalent load value ZW respectively through formulas ZJ-b-m and ZW-b-n; wherein m and n are respectively a contact long-life coefficient and a bending long-life coefficient;
the material analysis module is used for analyzing the reliability of the gear, and the specific analysis process comprises the following steps:
step C1: obtaining a material stress value S according to a formula S-N-c-alpha-beta/d, wherein alpha and beta are respectively the elongation and the local safety factor of the material, and 0 & ltalpha & lt 1, beta & gt 1;
step C2: respectively generating an S-N curve graph and a Haff diagram of the material according to a formula S-N-c-alpha-beta/d; .
The transmission ratio analysis module is used for analyzing the transmission ratio of the multi-stage shaft, and the specific process comprises the following steps:
step D1: obtaining a low-speed step gear ratio DB by a formula DB ═ ZC/PS ═ DS/GS;
step D2: obtaining a high-speed gear ratio GB through a formula GB ═ ZC A/PS (DS/GS);
the shaft analysis module is used for calculating the deformation coefficient and the vibration coefficient of the shaft, and the specific calculation process comprises the following steps:
step B1: by the formula BXk＝Q*(WJk-NJk)*ZGk/LkObtaining the deformation system of the shaftNumber BXk(ii) a Wherein Q is a shear deformation influence factor of the shaft, and Q is more than 0 and less than 0.5;
step B2: when BXkWhen the deformation coefficient of the shaft meets the design requirement or more than BX0, carrying out the next step;
step B3: the method comprises the following steps that (1) adding force parameters of an input shaft are input, wherein the adding force parameters comprise an X-axis component and a Y-axis component of concentrated force and an X-axis bending moment and a Y-axis bending moment of concentrated bending moment; and marked as XL, YL, XJ, YJ, respectively;
step B4: the vibration coefficient ZX of the shaft is obtained by the formula ZX ═ (XL XJ)/(YL YJ).
Further, the load file information includes the angular velocity, the load interval value, the maximum interval number of continuous spectrums and the minimum interval number of continuous spectrums at the current time, and the angular velocity, the load interval value, the maximum interval number of continuous spectrums and the minimum interval number of continuous spectrums at the current time are respectively marked as a, b, CXMAX、CXMIN(ii) a And sending the load file information to a load analysis module.
Further, the material basic information comprises a material type, a material load cycle number, a material tensile strength and a material yield strength, and the material type, the material load cycle number, the material tensile strength and the material yield strength are marked as i, N, c and d respectively; the material basis information is sent to a material analysis module.
Further, the transmission data of the shaft specifically comprises the number of parallel shaft stages, a total transmission ratio, an upper limit value of a low-speed-stage width-diameter ratio, an upper limit value of a high-speed-stage width-diameter ratio and a limit value of a single-stage gear ratio of the parallel shaft, the ratio of the low-speed-stage width-diameter ratio to the high-speed-stage width-diameter ratio is obtained, the number of parallel shaft stages, the total transmission ratio, the upper limit value of the low-speed-stage width-diameter ratio, the upper limit value of the high-speed-stage width-diameter ratio and the limit value of the single-stage gear ratio of the parallel shaft are respectively recorded as A, ZC, DS, GS and PS, and the ratio of the low-speed-stage width-diameter ratio to the high-speed-stage width-diameter is DS/GS; the transmission data of the shaft is sent to a transmission ratio analysis module.
Further, the shaft parameters specifically include a shaft serial number, a length of each shaft, an outer diameter of each shaft, an inner diameter of each shaft, and a grid number of each shaft, and the shaft serial numberMarked as a k-th section shaft, k is more than or equal to 1 and is an integer, the length of the shaft is LkThe outer diameter of the shaft is WJkInner diameter NJ of shaftkAnd shaft stiffness ZGk(ii) a The axis parameters are sent to an axis analysis module.
The invention has the beneficial effects that: the transmission design system is provided with a parameter input module, a transmission ratio analysis module, a material analysis module, a load analysis module, a shaft analysis module, a result output module and a processor; inputting load file information, material basic information, transmission data of a shaft and shaft parameters through a parameter input module; analyzing the load file through a load analysis module according to the load file information input by the parameter input module; analyzing the basic information of the material through a material analysis module so as to obtain the reliability of the material; analyzing the transmission data of the shaft through a transmission analysis module so as to obtain the transmission ratio data of the multi-stage shaft; the shaft parameters are analyzed through the shaft analysis module, so that the deformation coefficient and the vibration coefficient of the shaft are obtained, the design result can be simulated according to different data before formal transmission design is carried out, reference is provided for design work, and the transmission design efficiency is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic block diagram of a transmission design system.
Detailed Description
As shown in fig. 1, the transmission design system includes a parameter entry module, a transmission ratio analysis module, a material analysis module, a load analysis module, a shaft analysis module, a result output module, and a processor;
example 1
The parameter input moduleThe method is used for inputting load file information, the load file information comprises the angular velocity, the load interval value, the maximum interval number of continuous spectrums and the minimum interval number of continuous spectrums at the current moment, and the angular velocity, the load interval value, the maximum interval number of continuous spectrums and the minimum interval number of continuous spectrums at the current moment are respectively marked as a, b and CXMAX、CXMIN(ii) a Sending the load file information to a load analysis module;
the load analysis module is used for analyzing the load file information, and the specific analysis process comprises the following steps:
step Z1: continuously counting the input load file information;
step Z2: generating a load spectrum according to the processed load file information;
step Z3: a gear load analysis unit which guides the load spectrum into a load analysis module;
step Z4: obtaining a gear contact equivalent load value ZJ and a gear bending equivalent load value ZW respectively through formulas ZJ-b-m and ZW-b-n; wherein m and n are respectively a contact long-life coefficient and a bending long-life coefficient;
step Z5: and sending the data obtained in the steps Z1-Z4 to a processor, and outputting the load analysis result through a result output module by the processor.
Example 2
The parameter input module is used for inputting material basic information, wherein the material basic information comprises a material type, a material load cycle number, a material tensile strength and a material yield strength, and the material type, the material load cycle number, the material tensile strength and the material yield strength are marked as i, N, c and d respectively; sending the material basic information to a material analysis module;
the material analysis module is used for analyzing the reliability of the gear, and the specific analysis process comprises the following steps:
step C1: obtaining a material stress value S according to a formula S-N-c-alpha-beta/d, wherein alpha and beta are respectively the elongation and the local safety factor of the material, and 0 & ltalpha & lt 1, beta & gt 1;
step C2: respectively generating an S-N curve graph and a Haff diagram of the material according to a formula S-N-c-alpha-beta/d;
step C3: and sending the data obtained in the steps C1-C2 to a processor, and then outputting the material analysis result through a result output module.
Example 3
The parameter input module is used for inputting transmission data of a shaft, the transmission data of the shaft specifically comprises the number of parallel shaft stages, a total transmission ratio, an upper limit value of a low-speed-stage width-diameter ratio, an upper limit value of a high-speed-stage width-diameter ratio and a limit value of a parallel-shaft single-stage gear ratio, the ratio of the low-speed-stage width-diameter ratio to the high-speed-stage width-diameter is obtained, the number of parallel shaft stages, the total transmission ratio, the upper limit value of the low-speed-stage width-diameter ratio, the upper limit value of the high-speed-stage width-diameter ratio and the limit value of the parallel-shaft single-stage gear ratio are respectively marked as A, ZC, DS, GS and PS, and the ratio of the low-speed-stage width-diameter to the high-speed-stage width-diameter is DS/GS; transmitting the transmission data of the shaft to a transmission ratio analysis module;
the transmission ratio analysis module is used for analyzing the transmission ratio of the multi-stage shaft, and the specific process comprises the following steps:
step D1: obtaining a low-speed step gear ratio DB by a formula DB ═ ZC/PS ═ DS/GS;
step D2: obtaining a high-speed gear ratio GB through a formula GB ═ ZC A/PS (DS/GS);
step D3: and D1-D2, and the processor outputs the analysis result through the result output module.
Example 4
The parameter recording module is used for inputting shaft parameters, the shaft parameters specifically comprise shaft serial numbers, the length of each shaft, the outer diameter of each shaft, the inner diameter of each shaft and the grid number of each shaft, the shaft serial numbers are recorded as kth section shafts, k is greater than or equal to 1 and is an integer, and the length of each shaft is LkThe outer diameter of the shaft is WJkInner diameter NJ of shaftkAnd shaft stiffness ZGk(ii) a Sending the axis parameters to an axis analysis module;
the shaft analysis module is used for calculating the deformation coefficient and the vibration coefficient of the shaft, and the specific calculation process comprises the following steps:
step B1: by the formula BXk＝Q*(WJk-NJk)*ZGk/LkObtaining the deformation coefficient BX of the shaftk(ii) a Wherein Q is a shear deformation influence factor of the shaft, and Q is more than 0 and less than 0.5;
step B2: when BXkWhen the deformation coefficient of the shaft meets the design requirement or more than BX0, carrying out the next step;
step B3: the method comprises the following steps that (1) adding force parameters of an input shaft are input, wherein the adding force parameters comprise an X-axis component and a Y-axis component of concentrated force and an X-axis bending moment and a Y-axis bending moment of concentrated bending moment; and marked as XL, YL, XJ, YJ, respectively;
step B4: obtaining the vibration coefficient ZX of the shaft by the formula ZX ═ (XL XJ)/(YL YJ);
step B5: and B1-B4, and the processor outputs the deformation coefficient and the vibration coefficient of the shaft through a result output module.
The working principle is as follows: inputting load file information through a parameter input module, sending the load file information to a load analysis module, analyzing the load file by the load analysis module according to the angular velocity, the load interval value, the maximum interval number of continuous spectrums and the minimum interval number of continuous spectrums at the current moment in the load file information, and outputting an analysis result through a result output module;
inputting material basic information through a parameter input module, sending the material basic information to a material analysis module, analyzing the material type, the material load cycle number, the material tensile strength and the material yield strength through the material analysis module to obtain the reliability of the material, and outputting the result analyzed by the material analysis module through a result output module;
the transmission analysis module analyzes the number of parallel shafts, the total transmission ratio, the upper limit value of the low-speed-level width-diameter ratio, the upper limit value of the high-speed-level width-diameter ratio and the limit value of the single-stage gear ratio of the parallel shafts to obtain the ratio of the low-speed-level width-diameter to the high-speed-level width-diameter ratio, and obtains the transmission ratio of the multi-stage shafts according to the obtained data, so that the analysis of the transmission ratio of the counter shaft is completed, and the analysis result is output through the result output module;
inputting shaft parameters through a parameter input module; the shaft parameters are sent to a shaft analysis module, the shaft analysis module analyzes the deformation coefficient of the shaft according to the length of each shaft, the outer diameter of each shaft, the inner diameter of each shaft and the grid of each shaft, the additional force parameters of the input shaft are used for obtaining the vibration coefficient of the shaft, namely the X-axis component force and the Y-axis component force of the concentrated force and the X-axis bending moment and the Y-axis bending moment of the concentrated bending moment, and the deformation coefficient and the vibration coefficient of the shaft are output through a result output module; before the transmission design is formally carried out, the design result can be simulated according to different data, and a corresponding simulation result is obtained, so that reference is provided for the design work, and the efficiency of the transmission design is greatly improved.
The above formulas are all calculated by removing dimensions and taking numerical values thereof, the formula is a formula which is obtained by acquiring a large amount of data and performing software simulation to obtain the closest real situation, and the preset parameters and the preset threshold value in the formula are set by the technical personnel in the field according to the actual situation or obtained by simulating a large amount of data.
The foregoing is illustrative and explanatory of the structure of the invention, and various modifications, additions or substitutions in a similar manner to the specific embodiments described may be made by those skilled in the art without departing from the structure or scope of the invention as defined in the claims. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Claims (5)
1. The transmission design system is characterized by comprising a parameter input module, a transmission ratio analysis module, a material analysis module, a load analysis module, a shaft analysis module, a result output module and a processor;
the parameter input module is used for inputting load file information, material basic information, transmission data of a shaft and shaft parameters;
the load analysis module is used for analyzing the load file information, and the specific analysis process comprises the following steps:
step Z1: continuously counting the input load file information;
step Z2: generating a load spectrum according to the processed load file information;
step Z3: a gear load analysis unit which guides the load spectrum into a load analysis module;
step Z4: obtaining a gear contact equivalent load value ZJ and a gear bending equivalent load value ZW respectively through formulas ZJ-b-m and ZW-b-n; wherein m and n are respectively a contact long-life coefficient and a bending long-life coefficient;
the material analysis module is used for analyzing the reliability of the gear, and the specific analysis process comprises the following steps:
step C1: obtaining a material stress value S according to a formula S-N-c-alpha-beta/d, wherein alpha and beta are respectively the elongation and the local safety factor of the material, and 0 & ltalpha & lt 1, beta & gt 1;
step C2: respectively generating an S-N curve graph and a Haff diagram of the material according to a formula S-N-c-alpha-beta/d;
the transmission ratio analysis module is used for analyzing the transmission ratio of the multi-stage shaft, and the specific process comprises the following steps:
step D1: obtaining a low-speed step gear ratio DB by a formula DB ═ ZC/PS ═ DS/GS;
step D2: obtaining a high-speed gear ratio GB through a formula GB ═ ZC A/PS (DS/GS);
the shaft analysis module is used for calculating the deformation coefficient and the vibration coefficient of the shaft, and the specific calculation process comprises the following steps:
step B1: by the formula BXk＝Q*(WJk-NJk)*ZGk/LkObtaining a shaftCoefficient of deformation BXk(ii) a Wherein Q is a shear deformation influence factor of the shaft, and Q is more than 0 and less than 0.5;
step B2: when BXkWhen the deformation coefficient of the shaft meets the design requirement or more than BX0, carrying out the next step;
step B3: the method comprises the following steps that (1) adding force parameters of an input shaft are input, wherein the adding force parameters comprise an X-axis component and a Y-axis component of concentrated force and an X-axis bending moment and a Y-axis bending moment of concentrated bending moment; and marked as XL, YL, XJ, YJ, respectively;
step B4: the vibration coefficient ZX of the shaft is obtained by the formula ZX ═ (XL XJ)/(YL YJ).
2. The transmission design system of claim 1, wherein the load file information includes angular velocity, load interval value, a maximum interval fraction of persistent spectrum, and a minimum interval fraction of persistent spectrum at a current time.
3. The transmission design system of claim 1, wherein the material basis information includes a material type, a number of material load cycles, a material tensile strength, and a material yield strength.
4. The transmission design system according to claim 1, wherein the transmission data of the shaft specifically includes the number of parallel shaft stages, the total transmission ratio, the upper limit value of the low-speed stage width-to-diameter ratio, the upper limit value of the high-speed stage width-to-diameter ratio, and the limit value of the parallel shaft single-stage gear ratio, and the ratio of the low-speed stage width-to-high-speed stage width-to-diameter is obtained.
5. The transmission design system of claim 1, wherein the shaft parameters specifically include a shaft number, a length of each shaft, an outer diameter of each shaft, an inner diameter of each shaft, and a mesh count of each shaft.
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