CN104036068B - Automobile collision safety simulation analysis optimization design integrated system - Google Patents
Automobile collision safety simulation analysis optimization design integrated system Download PDFInfo
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Abstract
The invention discloses an integrated system for simulation analysis, optimization and design of automobile collision safety, which drives a virtual actuator to circularly execute, analyze, simulate and analyze, wherein the virtual actuator feeds back a structure to the simulation analysis system through circular execution analysis, the simulation analysis system automatically extracts data to a virtual sensor, and the virtual sensor feeds back an automatic transmission structure to the optimization design system, thereby greatly improving the overall efficiency of automobile analysis and optimization: the existing scheme is based on independent software, data transmission is carried out by adopting files, and a lot of manual operations are needed for extracting results; according to the technical scheme, after the virtual actuators (structural actuators and the like) and the virtual sensors (deformation sensors, B-column acceleration sensors and the like) related to automobile collision are defined, the CAE analysis and result extraction can be directly driven, and data are transmitted inside the system, so that the efficiency is improved.
Description
Technical Field
The invention relates to the technical field of computer simulation application, in particular to an automobile collision safety simulation analysis optimization design integrated system.
Background
Automobile collision accidents account for a large proportion of traffic accidents and are seriously dangerous to the life safety of drivers and passengers. Related laws and regulations are provided in countries around the world to ensure safety in case of collision of automobiles. Each vendor needs to perform collision simulation and evaluation of the design in order to be able to obtain a good rating at the time of certification. And then carrying out optimization design and then carrying out proofreading again. In the automotive field, the work is performed separately, and a large amount of manual statistics and operation are needed in the middle, so that a large amount of time and energy are consumed. With the intensification of market competition, the core competitiveness of various manufacturers is reflected by rapidly providing the automobiles with high-quality designs. This makes the integration problem of how to accelerate the design of structural and attribute parameters, simulation analysis and optimization design of the automobile become a core technical problem.
The current Computer Aided Design (CAD), Computer Aided Engineering (CAE) and optimization design method play an important role in the research, development and manufacture of the fields of automobiles, aviation, aerospace, energy sources and the like. In the industrial product design process, initial structural parameters are generally obtained by design; then, the structure is corrected and verified through an analysis method; and then further carrying out a reverse calculation through an optimization method to obtain the optimal structure or attribute parameters. However, because of the development of CAE and the optimization design as independent subjects, simulation analysis and optimization design mainly exist in a mode of independent software operation at present, and data transmission between the simulation analysis and optimization design is mainly completed through text files or independent parameter files. Although part of software or technical solutions such as Isight realizes driving of the simulation analysis program in the optimization design, due to the independence of the simulation analysis program and the optimization design program, driving can only be realized by modifying the input file of the simulation analysis program at present. This is also achieved by external driving, in essence. Another significant problem with this approach is that the results of the calculations cannot be obtained directly and accurately, particularly when the results are not derived from a single variable value, but rather from a complex calculation of multiple variables.
Disclosure of Invention
The invention aims to solve the existing problems and provide an integrated system for simulating, analyzing and optimally designing the collision safety of the automobile, which can accelerate the integration of the design of structural and attribute parameters, the simulation analysis and the optimal design of the automobile.
The object of the invention is achieved in the following way: an integrated system for simulation, analysis, optimization and design of automobile collision safety, the integrated system comprising: the virtual actuator is used for driving parameter change, and after the relationship is established between the virtual actuator and elements in simulation analysis, parameters can be changed within a specified range, so that the simulation analysis method can be driven to calculate and solve different parameters;
the virtual sensor is a logic unit used for inserting various types of virtual structures into the simulation model to achieve the aim of directly acquiring corresponding results or information;
the simulation analysis system is used for dividing input parameters into units, characteristics and loads, and analyzing and calculating results, and can be represented by a simulation analysis quintuple model;
the optimization design system is used for inputting design variables, design targets and design constraints which can be decomposed into the design variables, and then combining an optimization algorithm and an optimization result, and the optimization design system can be represented by an optimization design quintuple model;
the optimization design system drives the virtual actuator to circularly execute, analyze and simulate the analysis system, the virtual actuator feeds back the structure to the simulation analysis system through circular execution analysis, the simulation analysis system automatically extracts data to the virtual sensor, and the virtual sensor feeds back the automatic transmission structure to the optimization design system.
The simulation analysis quintuple model in the technical scheme respectively comprises: element: the generalized unit is a real object of simulation analysis (i.e. an analysis carrier), and the carrier is mainly an actual structure or part (such as a front wall plate, a bumper or a whole automobile and the like) which exists physically; property: the characteristics are static common attribute information on some analysis objects, such as materials, sections and the like; load: the load is external influence factors or conditions loaded on the analysis loads, such as stress load, temperature load, boundary conditions and the like; analysis: the analysis is various specific simulation analysis methods and evaluation methods; and (4) Result: calculated data and tables, clouds, reports based on data processing.
The integrated system for simulation analysis and optimization design of the automobile collision safety comprises the following five-tuple models: variable: the design variables are identifiers of variable quantities in the model, and comprise structural parameters, characteristic parameters, load parameters and the like; target: the design objective is the index or the processing result of the index which is finally used for measuring the quality or the reasonability of the model; constraint: design constraints are rules that the system needs to comply with when considering optimization, such as safety margins needing to meet minimum requirements; OptAlgorithm: the optimization design method is a specific algorithm for various optimization designs; OptResult: and obtaining the optimal value of the design variable by optimizing and calculating the optimization result.
The integrated system for the simulation analysis, optimization and design of the automobile collision safety comprises design variables, design targets and design constraints, wherein the related elements in a simulation analysis system have direct or indirect corresponding relations, the established corresponding relations between the elements can break the gap between the two modules, the optimization design system can drive the simulation analysis system, and desired data can be directly obtained from the simulation analysis system, so that the efficiency and the data quality are greatly improved.
The virtual sensor comprises a general virtual sensor and a special virtual sensor, wherein the general virtual sensor comprises a temperature sensor, a deformation sensor, a B-column acceleration sensor, a front wall plate intrusion sensor and a collision assessment sensor; and the special virtual sensor is a B-column acceleration sensor in a car collision safety system and an intensity sensor in an engine optimization design system related to a specific system.
In the above technical solution, the temperature sensor includes a three-dimensional coordinate which is node position information acting on the temperature sensor, and the deformation sensor: the method comprises the steps of including an original reference point and deformation position point information; the B-pillar acceleration sensor comprises node position information on a B-pillar component; the front wall intrusion amount sensor comprises an original reference point and a plurality of intrusion amount detection points; the collision assessment sensor comprises index data defined in various regulations, and the data need to be extracted and stored independently when the collision assessment sensor is implemented.
The virtual actuator comprises a virtual unit actuator, a virtual characteristic actuator and a virtual load actuator.
According to the technical scheme, the virtual actuator defines a related object, and the structural actuator can be related to parts; and meanwhile, providing driving variables associated with specific parameters of the structural component, and defining the type, the range and the value length of the variables.
The invention has the advantages that: 1) great promotion the whole efficiency of automobile analysis and optimization: the existing scheme is based on independent software, data transmission is carried out by adopting files, and a lot of manual operations are needed for extracting results; according to the technical scheme, after virtual actuators (structural actuators and the like) and virtual sensors (deformation sensors, B-column acceleration sensors and the like) related to automobile collision are defined, CAE analysis and result extraction can be directly driven, data are transmitted inside the system, and therefore efficiency is improved;
2) have higher data consistency: seamless connection and transmission of simulation analysis data and optimization design data are realized through modeling technologies such as a 'generalized model' and a 'proxy model', the data exist in the system as an integral system, error probability possibly introduced by importing/exporting is reduced, and the system constructed by the technical scheme has higher consistency and integrity;
3) reduce and use the degree of difficulty, promote user experience: the technical scheme of the invention provides technical support for constructing a targeted integrated system of automobile collision simulation analysis and optimization design, and can reduce the difficulty in use. The system constructed by the technical scheme of the invention has stronger pertinence and practicability, and can be used more effectively by a user without having deep knowledge and requirements on an optimization design theory and the like.
4) The method has good expandability: the technical scheme provided by the invention aims at the simulation analysis and optimization design of the automobile collision, but the framework system adopting the technical scheme provided by the invention can adapt to different requirements in different fields through the high extraction of the CAE simulation analysis and optimization design, and has good expandability.
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In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic diagram of an integrated technique and system for simulation analysis and optimization design of automobile collision according to the present invention;
FIG. 2 is a detailed mapping relationship diagram between elements of the present invention;
FIG. 3 is a diagram of the element composition and top level relationship of the present invention.
The specific implementation mode is as follows:
referring to fig. 1, 2 and 3, an integrated system for simulation, analysis, optimization and design of automobile crash safety comprises: the virtual actuator is used for driving parameter change, and after the relationship is established between the virtual actuator and elements in simulation analysis, parameters can be changed within a specified range, so that the simulation analysis method can be driven to calculate and solve different parameters;
the virtual sensor is a logic unit used for inserting various types of virtual structures into the simulation model to achieve the aim of directly acquiring corresponding results or information;
the simulation analysis system is used for dividing input parameters into units, characteristics and loads, and analyzing and calculating results, and can be represented by a simulation analysis quintuple model;
the optimization design system is used for inputting design variables, design targets and design constraints which can be decomposed into the design variables, and then combining an optimization algorithm and an optimization result, and the optimization design system can be represented by an optimization design quintuple model;
the optimization design system drives the virtual actuator to circularly execute, analyze and simulate the analysis system, the virtual actuator feeds back the structure to the simulation analysis system through circular execution analysis, the simulation analysis system automatically extracts data to the virtual sensor, and the virtual sensor feeds back the automatic transmission structure to the optimization design system.
The simulation analysis quintuple model respectively comprises: element: the generalized unit is a real object of simulation analysis (i.e. an analysis carrier), and the carrier is mainly an actual structure or part (such as a front wall plate, a bumper or a whole automobile and the like) which exists physically; property: the characteristics are static common attribute information on some analysis objects, such as materials, sections and the like; load: the load is external influence factors or conditions loaded on the analysis loads, such as stress load, temperature load, boundary conditions and the like; analysis: the analysis is various specific simulation analysis methods and evaluation methods; and (4) Result: calculated data and tables, clouds, reports based on data processing.
The optimization design quintuple model respectively comprises: variable: the design variables are identifiers of variable quantities in the model, and comprise structural parameters, characteristic parameters, load parameters and the like; target: the design objective is the index or the processing result of the index which is finally used for measuring the quality or the reasonability of the model; constraint: design constraints are rules that the system needs to comply with when considering optimization, such as safety margins needing to meet minimum requirements; OptAlgorithm: the optimization design method is a specific algorithm for various optimization designs; OptResult: and obtaining the optimal value of the design variable by optimizing and calculating the optimization result.
The optimized design system comprises design variables, design targets and design constraints, wherein related elements in a simulation analysis system have direct or indirect corresponding relations, the established corresponding relations between the elements can break the gap between two modules, the optimized design system can drive the simulation analysis system, and desired data can be directly obtained from the simulation analysis system, so that the efficiency and the data quality are greatly improved.
The virtual sensors comprise general virtual sensors and special virtual sensors, and the general virtual sensors comprise temperature sensors, deformation sensors, B-pillar acceleration sensors, dash board intrusion amount sensors and collision assessment sensors; and the special virtual sensor is a B-column acceleration sensor in a car collision safety system and an intensity sensor in an engine optimization design system related to a specific system.
The temperature sensor comprises three-dimensional coordinates which are node position information acting on the temperature sensor, and the deformation sensor: the method comprises the steps of including an original reference point and deformation position point information; the B-pillar acceleration sensor comprises node position information on a B-pillar component; the front wall intrusion amount sensor comprises an original reference point and a plurality of intrusion amount detection points; the collision assessment sensor comprises index data defined in various regulations, and the data need to be extracted and stored independently when the collision assessment sensor is implemented.
The virtual actuators include virtual unit actuators, virtual characteristic actuators, and virtual load actuators.
The virtual actuators define associated objects, and the structural actuators may and may only be associated with parts; and meanwhile, providing driving variables associated with specific parameters of the structural component, and defining the type, the range and the value length of the variables.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an automobile collision security simulation analysis optimal design integration system which characterized in that: the integrated system includes: the virtual actuator is used for driving parameter change, and after the relationship is established between the virtual actuator and elements in simulation analysis, parameters can be changed within a specified range, so that the simulation analysis method can be driven to calculate and solve different parameters;
the virtual sensor is a logic unit used for inserting various types of virtual structures into the simulation model to achieve the aim of directly acquiring corresponding results or information;
the simulation analysis system is used for dividing input parameters into generalized units, characteristics and loads, and analyzing and calculating results, and can be represented by a simulation analysis quintuple model;
the optimization design system is used for inputting design variables, design targets and design constraints which can be decomposed into, and then the optimization design method and the optimization result are combined, so that the optimization design system can be represented by an optimization design quintuple model;
the optimization design system drives the virtual actuator to circularly execute, analyze and simulate the analysis system, the virtual actuator feeds back the structure to the simulation analysis system through circular execution analysis, the simulation analysis system automatically extracts data to the virtual sensor, and the virtual sensor feeds back the automatic transmission structure to the optimization design system.
2. The integrated system for the simulation, analysis and optimization design of the automobile collision safety according to claim 1, characterized in that: the simulation analysis quintuple model respectively comprises: element: the generalized unit is a real object of simulation analysis, namely an analysis carrier, and the carrier is a physical existing actual structure or part, including a front wall plate, a bumper or a whole automobile of the automobile; property: the characteristics are static common attribute information on some analysis objects, including materials and sections; load: the load is external influence factors or conditions loaded on the analysis loads, and comprises stress load, temperature load and boundary conditions; analysis: the analysis is various specific simulation analysis methods and evaluation methods; and (4) Result: calculated data and tables, clouds, reports based on data processing.
3. The integrated system for the simulation, analysis and optimization design of the automobile collision safety according to claim 1, characterized in that: the optimization design quintuple model respectively comprises: variable: the design variables are identifiers of variable quantities in the model and comprise structural parameters, characteristic parameters and load parameters; target: the design objective is the index or the processing result of the index which is finally used for measuring the quality or the reasonability of the model; constraint: design constraints are rules that the system needs to comply with when considering optimizations, including safety margins that need to meet minimum requirements; OptAlgorithm: the optimization design method is a specific algorithm for various optimization designs; OptResult: and obtaining the optimal value of the design variable by optimizing and calculating the optimization result.
4. The integrated system for the simulation, analysis and optimization design of the automobile collision safety according to claim 1, characterized in that: the optimized design system comprises design variables, design targets and design constraints, wherein related elements in a simulation analysis system have direct or indirect corresponding relations, the established corresponding relations between the elements can break the gap between two modules, the optimized design system can drive the simulation analysis system, and desired data can be directly obtained from the simulation analysis system, so that the efficiency and the data quality are greatly improved.
5. The integrated system for the simulation, analysis and optimization design of the automobile collision safety according to claim 1, characterized in that: the virtual sensors comprise a general virtual sensor and a special virtual sensor, and the general virtual sensor comprises a temperature sensor, a deformation sensor, a B-pillar acceleration sensor, a front coaming intrusion sensor and a collision assessment sensor; and the special virtual sensor is a B-column acceleration sensor in a car collision safety system and an intensity sensor in an engine optimization design system related to a specific system.
6. The integrated system for the simulation, analysis and optimization design of the automobile collision safety according to claim 5, wherein: the temperature sensor comprises three-dimensional coordinates which are node position information acting on the temperature sensor, and the deformation sensor: the method comprises the steps of including an original reference point and deformation position point information; the B-pillar acceleration sensor comprises node position information on a B-pillar component; the front wall intrusion amount sensor comprises an original reference point and a plurality of intrusion amount detection points; the collision assessment sensor comprises index data defined in various regulations, and the data need to be extracted and stored independently when the collision assessment sensor is implemented.
7. The integrated system for the simulation, analysis and optimization design of the automobile collision safety according to claim 1, characterized in that: the virtual actuators include virtual unit actuators, virtual characteristic actuators, and virtual load actuators.
8. The integrated system for the simulation, analysis and optimization design of the automobile collision safety according to claim 7, wherein: the virtual actuators define associated objects, the virtual actuators may and may only be associated with the parts; and meanwhile, providing driving variables associated with specific parameters of the structural component, and defining the type, the range and the value length of the variables.
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