Overall Parameters Design and Optimization System for Gun and Bullet

Abstract

The choosing of overall parameters, in the conceptual design stage, has been shown decisive, for developing efficient and reliable final gun and bullet products. Aimed at the feature that multidisciplinary knowledge will be related in the overall parameters design process, and in order to meet the various design requirement and aim, a multidisciplinary design optimization system is proposed to automatically acquire the optimized overall design parameters in this paper. Based on the empirical methods of individual disciplines including mechanics, ballistics, dynamics, the analyzing procedures for each discipline are developed, the coupling relations between disciplines are analyzed, and the integral analytic and optimized model of overall parameters are presented, then an integrated multidisciplinary design optimization system is built through integrating each analyzing procedure as well as the optimization software iSIGHT. Taking the 7.62mm semi-automatic gun and bullet system as a verification example, the gun's firing rate and the bullet's destination kinetic energy are obviously improved compared to the initial values , which proves the feasibility and effectiveness of the proposed integration system in overall parameter design and optimization for gun and bullet system. Index Terms-Gun and bullet system, integration system, multidisciplinary design optimization, overall parameters. Zhifang Wei was born in China and obtained her PhD degree in artillery, automatic gun and ammunition engineering in North University of China in 2008. She joined the College of Mechatronic Engineering, North University of China in 1997 and now is an associate professor. Her research interests are focused on virtual design in arms engineering. Fang Wang was born in China and obtained his master's degree in artillery, automatic gun and ammunition engineering in North University of China in 2014. His research interests are focused on simulation technology in arms engineering.

Modified enhanced collaborative optimization method for artillery launching dynamic model with sequential process

“…Step 5: Obtain the system-level feasible solution by the gradient optimizer and calculate the distance Δd j of each design variable by equation (19) and figure out the new design variable boundaries by penalty design variable boundary method of equation ( 19) for Δd j < ε.…”

“…So far, few studies have focused on the complete optimization of the different stages of the projectile-barrel interaction. It is worth noting that Wei and Wang 19 utilized Isight ® to establish a multidisciplinary design optimization (MDO) model of light weapon with interior, exterior, and terminal ballistics. Despite their primary consideration of the overall performance of the full trajectory rather than of the projectile-barrel interaction, the MDO optimization method has been used to solve the sequential launch problem in the bore, which has offered an effective enlightenment for us.…”

Multi-Stage Multidisciplinary Design Optimization Method for Enhancing Complete Artillery Internal Ballistic Firing Performance

“…g pm ≤ 0, g vxm ≤ 0, g ym ≤ 0, g zm ≤ 0, g ym ≤ 0, g zm ≤ 0 (20) where the design variable x consists of the shared design variable x b and the local design variable x Lb = [l bd l RB l p d p W 0 ]; J subb is the consistency constraint function, and is the optimization objective of the PAM subsystem; g pm , g vxm , g ym , g zm , g ym and g zm are constraint functions from the Eqs. ( 10) ∼ (15).…”

“…The third approach is to consider each stage as a different subsystem and adopt a multidisciplinary design optimization (MDO) method to coordinate the shared design variables among these subsystems, so as to achieve the integrated optimization of the performance of the whole process [20,21]. For example, Xie et al [22] successfully coordinated the two subsystems of projectile engraving and chambering motion by applying the modified Enhanced Collaborative Optimization (ECO) method, which provides a new approach for solving the optimization problem of complex system models.…”

Ecotoxicity Effects of Lead Bullets in Human and Wildlife: The Consequences of Environmental Pollution, Low Intelligence Quotient, Brain Damage and Brain Overclaim Syndrome

“…Velocity of 150-170 fps is required by bullet to penetrate skin [121]. But bones change the speed of bullets greatly, by changing their course and slowing them down [159]. Origin of bullet can be determined using the major/minor axis which determines the impact angle, although modern laser methods provide better results.…”