ANSYS-based trajectory motion simulation method in projectile under forced angular vibration condition

A motion simulation and angular vibration technology, applied in design optimization/simulation, complex mathematical operations, instruments, etc., can solve problems such as inability to consider projectile action at the same time, no flow field, etc., and achieve cost-effective, high safety, and accurate results. Effect

Active Publication Date: 2021-03-12
NANJING UNIV OF SCI & TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

This method can be used to analyze the friction, force and deformation between the gun barrel and the projectile during the vibra

Method used

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  • ANSYS-based trajectory motion simulation method in projectile under forced angular vibration condition
  • ANSYS-based trajectory motion simulation method in projectile under forced angular vibration condition
  • ANSYS-based trajectory motion simulation method in projectile under forced angular vibration condition

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Embodiment

[0121] In order to verify the effectiveness of the scheme of the present invention, the following simulation experiments are carried out.

[0122] A certain type of tracked armored vehicle travels on a raised road to obtain forced angular vibration. Based on the above method, this embodiment simulates the situation of launching a projectile after the forced angular vibration starts 0.1s. The specific steps are as follows:

[0123] First, the equation of the forced angular vibration angular velocity ω changing with time t obtained according to the parameters is:

[0124] ω=54.0535[cos15.56(t+0.1)-cos15.71(t+0.1)]

[0125] Then, establish the three-dimensional geometric model of the gun barrel, projectile and flow field. Considering the symmetry of the flow field, a two-sided symmetric model is adopted to save computing resources. The geometric model used in the present invention is as figure 1 , 2 As shown, a 75mm caliber gun barrel is used, the length is 1.4m, and the actu...

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Abstract

The invention realizes a three-dimensional simulation method for simulating a trajectory motion state and a flow field distribution condition in a projectile under a forced angular vibration conditionby using a bidirectional fluid-solid coupling technology on the basis of an ANSYS software platform. The process from the movement of the projectile in the chamber to the discharge of the projectileout of the chamber is a high-temperature, high-pressure and multi-chemical reaction process, and the actual experimental measurement is difficult. The process is simulated by using a numerical simulation technology, so that the analysis of the motion state and the flow field change of the projectile in the chamber is facilitated. According to the method, a cannon barrel forced angular vibration equation is introduced by using a bidirectional fluid-solid coupling numerical simulation method, and numerical simulation is carried out on the process that the projectile is moved from the static state to the out-of-bore state under the forced angular vibration condition. The result obtained through simulation of the method is beneficial to research of the motion state of the launched projectile and the distribution situation of the flow fields inside and outside the chamber when forced angular vibration is generated in the advancing process of the artillery, and certain significance is achieved for research and development of self-propelled weaponry.

Description

technical field [0001] The invention relates to two-way fluid-solid coupling technology, in particular to an ANSYS-based method for simulating internal ballistic motion of projectiles under the condition of forced angular vibration. Background technique [0002] The shooting capability of self-propelled weapons during marching has become an important index to evaluate the combat performance of self-propelled weapons. In order to meet the needs of the actual situation on the battlefield, self-propelled weapons with artillery need to launch projectiles during high-speed travel, and due to the influence of road excitation during launch, it usually causes certain random vibrations. Random vibration is a complex motion formed by the joint action of various vibration modes. Among them, the forced angular vibration will have a significant impact on the motion of the projectile, which will lead to a decrease in the accuracy of the projectile. Using the two-way fluid-solid coupling...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06T17/20G06F17/13
CPCG06F30/23G06T17/20G06F17/13Y02T90/00
Inventor 刘宗凯唐维铨
Owner NANJING UNIV OF SCI & TECH
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