Simulation analysis method of on-board movement mechanism

Abstract

The invention provides a simulation analysis method for an on-board movement mechanism. A three-dimensional model of a movement mechanism device is utilized, a movement simulation and analysis module of related software is used, simulation analysis is conducted on a mechanical device of the movement mechanism on the ship by combing the simulation process and steps of the movement mechanism, and therefore the actual device installation and assembly process is mapped through a simulation conclusion, and the movement mechanism device installation and assembly process is optimized. Establishing a motion mechanism model, setting initial positions of main components of the mechanism, defining mechanism analysis, setting analysis conditions, finally performing motion simulation analysis, and performing comprehensive analysis and judgment on the ship motion mechanism. Various problems of the on-board movement mechanism in the mounting, assembling and working operation processes are verified through simulation by means of the three-dimensional model of the movement mechanism, various problems of the on-board movement mechanism in the working process can be solved, risks can be released in advance, and therefore a solid foundation is laid for improvement of the mounting, assembling and operation work quality and efficiency of the movement mechanism.

Description

Technical Field

[0001] The invention relates to the field of simulation technology, and in particular to a simulation analysis method for a motion mechanism on board a ship. Background Art

[0002] Mechanism motion analysis runs through the entire ship design and assembly process, and is crucial to speeding up the ship construction cycle. Mechanism motion analysis is the basis of mechanism dynamic analysis and the premise of assembly design and simulation. It makes the components move to simulate the actual movement of the ship mechanism. The motion trajectory of the driving mechanism is obtained by the law of motion. The simulation analysis of the ship motion mechanism is crucial for the assembly of ship components. my country has a relatively short research time in the field of ship motion mechanism simulation. It was not until the late 1980s that the simulation technology began to be studied, and it was gradually systematized to form a professional team for technical research in this area. Domestic scholars have done some innovative work in this field and achieved important results, which are used to guide the design and assembly of ship motion mechanisms. The initial method was to make a simple simulation device, but this type of device has a simple structure and it is difficult to accurately simulate the motion trajectory of the motion mechanism. In addition, the joint form of the motion mechanism is unstable. For example, the process of creating rotation joints, spherical joints, and prismatic joints cannot achieve accurate fit. Therefore, the accuracy of the parameter-driven assembly transfer process is not high. When adjusting the angle value, there is also manual deviation, which further increases the assembly error transmission rate.

[0003] The present invention utilizes a three-dimensional model of a motion mechanism device and uses motion simulation and analysis modules of relevant software to sort out the simulation process and steps of the motion mechanism to simulate and analyze the motion mechanism, especially the motion mechanism on board, such as a rudder, a water hole opening and closing device and other motion mechanism mechanical devices, so as to map the actual device installation and assembly process through the simulation conclusion, and optimize the motion mechanism device installation and assembly process. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a simulation analysis method for a shipboard motion mechanism in view of the problems in the installation, assembly and operation of the shipboard motion mechanism. The method can improve various problems in the work of the shipboard motion mechanism and release risks in advance by using the three-dimensional model of the motion mechanism for simulation verification, thereby laying a solid foundation for improving the quality and efficiency of the installation, assembly and operation of the motion mechanism and solving the technical problems of the shipboard motion mechanism.

[0005] The solution adopted by the present invention to solve the technical problem is: A simulation analysis method for a shipboard motion mechanism, using a three-dimensional model of a motion mechanism device, using motion simulation and analysis modules of related software, and combing through the simulation process and steps of the motion mechanism to simulate and analyze the mechanical device of the shipboard motion mechanism, thereby mapping the actual device installation and assembly process through the simulation conclusion, and optimizing the motion mechanism device installation and assembly process; 1. Create a motion mechanism model: Based on Creo motion simulation and analysis, creating a motion mechanism model means assembling the part model by "connection" after the part design is completed; adding a component to the mechanism model in the form of mechanical constraints, and the component has a certain degree of freedom of movement relative to the attached component; adding a connection component is the same as adding a fixed component, that is, after entering the assembly environment, adding a "connection" component to the mechanism device, and adjusting the relative motion relationship and degree of freedom between the component and other components in the device, so that the motion mechanism model can be created; 2. Set the initial position of the main components of the mechanism: After the kinematic mechanism model is created, that is, after the mechanism components are assembled, the initial positions of the main components in the mechanism need to be set, so that each simulation of the mechanism can start from the initial position to ensure the consistency of the motion simulation and the accuracy of the analysis; and set the relevant parameters through option settings to drive the assembly model movement; 3. Define Institutional Analysis: After the kinematic mechanism model is created and the initial positions of the main components of the mechanism are set, the kinematic mechanism type is defined. In the mechanism analysis module, position analysis, kinematic analysis, dynamic analysis, static analysis and force balance analysis are defined. Different analysis types have different requirements for the kinematic environment of the mechanism. After defining the type of kinematic mechanism analysis, proceed to the next step. 4. Set the analysis conditions: In the various conditional analyses of the mechanism, in order to make the analysis results closer to the real level, it is necessary to set the part properties in the mechanism and add some mechanical objects, such as mass properties, to set gravity, damping, moment and torque; in addition to adding attribute analysis conditions, initial conditions should also be added. The initial conditions are the starting state of the mechanism motion simulation. Defining the initial conditions before the start of the motion simulation can make each simulation start from the initial conditions. The initial conditions include the initial position and initial velocity, which can be set in the analysis condition setting module; 5. Motion simulation analysis: In addition to simulating the operation of the mechanism, the simulation of Creo motion mechanism also supports kinematic and dynamic simulation analysis of the mechanism. For a mechanism, multiple groups of analysis can be established, and the analysis results can be saved separately. If different analyses involve different mechanism subjects, the subject that is not currently involved in the analysis can be locked. Using position analysis to simulate the movement of the mechanism, the position data of the locked components under the constraints of all links in the mechanism can be recorded. Position simulation analysis can study the position of the components in the mechanism over time, component interference and the trajectory curve of the mechanism movement. Using kinematic simulation analysis to simulate the movement of the mechanism, the springs, dampers, gravity, torque and torque in the mechanism will not affect the motion analysis. In addition to studying the position of the components in the mechanism over time, component interference and the trajectory curve of the mechanism movement, kinematic simulation analysis can also analyze the velocity and acceleration in the mechanism. Using dynamic simulation analysis, the relationship between the inertial force, gravity and external force acting on each subject in the mechanism can be studied. Using static simulation analysis, the force acting on the subject that has reached a state of equilibrium can be studied. Using force balance simulation analysis, the applied force is obtained from the specific static form, which is a reverse static simulation analysis.

[0006] Positive effect, because the present invention conducts comprehensive analysis and evaluation of the shipboard motion mechanism by creating a motion mechanism model, setting the initial positions of the main components of the mechanism, defining the mechanism analysis, setting the analysis conditions, and finally conducting motion simulation analysis. Various problems in the installation, assembly and operation of the shipboard motion mechanism can be verified by simulating the three-dimensional model of the motion mechanism, which can improve various problems in the work of the shipboard motion mechanism and release risks in advance, thereby laying a solid foundation for improving the quality and efficiency of the installation, assembly and operation of the motion mechanism. It is suitable for application as a simulation analysis method for shipboard motion mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The description of the present invention is given for the purpose of example and description, and is not exhaustive or limits the present invention to the disclosed form. Many modifications and changes are obvious to ordinary technicians in this field. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and enable ordinary technicians in this field to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0008] Figure 1 This is a block diagram of this embodiment. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0010] As shown in the figure, a simulation analysis method for a shipboard motion mechanism conducts a comprehensive analysis and evaluation of the shipboard motion mechanism by creating a motion mechanism model, setting the initial positions of the main components of the mechanism, defining the mechanism analysis, setting the analysis conditions, and finally performing a motion simulation analysis.

[0011] The specific implementation case selects the more important rudder transmission mechanism in the ship's motion mechanism, and uses the connection command to link the part models required for the motion mechanism of the double-cylinder driven rudder transmission device. After copying according to the number of parts, selectively paste them under the same horizontal assembly tree, switch to the Create Motion Mechanism Model command, and select a fixed part as the main part base.

[0012] 1. Create a kinematic mechanism model, switch to the kinematic mechanism module, select the connection module toolbar, create fixed parts and mechanical devices at the same time, select fixed parts as the main part base, other fixed parts can be rigidly joined, create rotational joints, spherical joints, prism joints, etc. Create a spherical joint between the left tiller rod and the left transmission rod, and a spherical joint between the right tiller rod and the right transmission rod, with 2 degrees of freedom. After creating the kinematic mechanism model, you can proceed to the next step.

[0013] 2. Set the initial position of the main parts of the mechanism and set parameters, set the initial position of the tiller lever and the transmission lever, set the initial position of the bulkhead plane, the rudder shaft and the rudder plate, and in the initial position setting module, use the drag command to pull the tiller lever and the transmission lever, the bulkhead plane, the rudder shaft and the rudder plate to the initial position, and save. Set parameters in the option settings, switch to the assembly module, create angle parameters, create the angle between the bulkhead plane and the rudder shaft and the rudder plate and edit the formula, add fixed constraints to the bulkhead, edit the angle parameters, and adjust the angle value to achieve real-time model updates.

[0014] 3. Define the mechanism analysis. After the left and right tiller handle rods, left and right transmission rods, and motion mechanism model are created, and the initial positions of the tiller handle rod, transmission rod, bulkhead plane, rudder shaft, and rudder plate are set, continue to define the motion mechanism type. Define the analysis type of the machine motion mechanism in the mechanism analysis module, define it as motion analysis, then select interference check in motion analysis and proceed to the next step.

[0015] 4. Set the analysis conditions. In the Set Analysis Conditions module, select the interference check type between the two parts, create an interference check, click the Apply button, record the interference value between the left tiller rod and the left guide device, and record the interference value between the right tiller rod and the right guide device. Because the left and right tiller rods can rotate along their own axes, you can adjust the rotation angle and check the interference.

[0016] 5. Motion simulation analysis, because the left and right tiller rods can rotate along their own axis, switch to the motion mechanism Mocha, modify the combination of the left and right tiller rods and the left and right transmission rods, after using the universal universal joint, the degree of freedom is 0, you can perform simulation analysis, select the left and right tiller rods and the left and right transmission rods, create a simulation, modify the angle rotation increment and automatic insertion, check the automatic insertion, modify the rotation box increment, drag the command slider or click the up arrow or press the up and down keys on the keyboard, the command value will be automatically changed, and the animation will be automatically inserted. Click Edit Analysis, generate the swept body and perform a static interference check, add the created interference check in the dialog box, and modify the interference option to stop, that is, the motion mechanism will stop when interference occurs. Check the animation viewpoint to insert the viewpoint at the specified action position, change the viewing angle and zoom lens, click the compile simulation command to generate a replay (you can double-click to play in the structure tree) or generate an animation file, and check the values ​​of each parameter when the mechanism stops, that is, the interference value. Check the "Keep position on exit" to retain the state of each model when the interference occurs, view the interference results on the structure tree, update the interference value after application, and finally optimize and correct the mechanism movement assembly and installation process according to the interference value data.

[0017] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A simulation analysis method for a shipboard motion mechanism, characterized by: By using the 3D model of the motion mechanism device and the motion simulation and analysis modules of the relevant software, the mechanical device of the motion mechanism on board is simulated and analyzed by combing the simulation process and steps of the motion mechanism, so as to map the actual device installation and assembly process through the simulation conclusion and optimize the installation and assembly process of the motion mechanism device; The following steps are involved: 1) Create a motion mechanism model: Based on Creo motion simulation and analysis, creating a motion mechanism model means assembling the part model by "connection" after the part design is completed; adding a component to the mechanism model in the form of mechanical constraints, and the component has a certain degree of freedom of movement relative to the attached component; adding a connection component is the same as adding a fixed component, that is, after entering the assembly environment, adding a "connection" component to the mechanism device, and adjusting the relative motion relationship and degree of freedom between the component and other components in the device, the motion mechanism model can be created; 2) Set the initial position of the main components of the mechanism: After the kinematic mechanism model is created, that is, after the mechanism components are assembled, the initial positions of the main components in the mechanism need to be set, so that each simulation of the mechanism can start from the initial position to ensure the consistency of the motion simulation and the accuracy of the analysis; and set the relevant parameters through option settings to drive the assembly model movement; 3) Define Institutional Analysis: After the kinematic mechanism model is created and the initial positions of the main components of the mechanism are set, the kinematic mechanism type is defined. In the mechanism analysis module, position analysis, kinematic analysis, dynamic analysis, static analysis and force balance analysis are defined. Different analysis types have different requirements for the kinematic environment of the mechanism. After defining the type of kinematic mechanism analysis, proceed to the next step. 4) Set the analysis conditions: In the various conditional analyses of the mechanism, in order to make the analysis results closer to the real level, it is necessary to set the part properties in the mechanism and add some mechanical objects, such as mass properties, to set gravity, damping, moment and torque; in addition to adding attribute analysis conditions, initial conditions should also be added. The initial conditions are the starting state of the mechanism motion simulation. Defining the initial conditions before the start of the motion simulation can make each simulation start from the initial conditions. The initial conditions include the initial position and initial velocity, which can be set in the analysis condition setting module; 5) Motion simulation analysis: In addition to simulating the operation of the mechanism, the simulation of Creo motion mechanism also supports kinematic and dynamic simulation analysis of the mechanism. For a mechanism, multiple groups of analysis can be established, and the analysis results can be saved separately. If different analyses involve different mechanism subjects, the subject that is not currently involved in the analysis can be locked. Using position analysis to simulate the movement of the mechanism, the position data of the locked components under the constraints of all links in the mechanism can be recorded. Position simulation analysis can study the position of the components in the mechanism over time, component interference and the trajectory curve of the mechanism movement. Using kinematic simulation analysis to simulate the movement of the mechanism, the springs, dampers, gravity, torque and torque in the mechanism will not affect the motion analysis. In addition to studying the position of the components in the mechanism over time, component interference and the trajectory curve of the mechanism movement, kinematic simulation analysis can also analyze the velocity and acceleration in the mechanism. Using dynamic simulation analysis, the relationship between the inertial force, gravity and external force acting on each subject in the mechanism can be studied. Using static simulation analysis, the force acting on the subject that has reached a state of equilibrium can be studied. Using force balance simulation analysis, the applied force is obtained from the specific static form, which is a reverse static simulation analysis.

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