摘要
本研究以折流板及輕量化兩種主要砲口制退器設計，進行砲口流場分析模擬，得到砲口周圍之壓力、氣流速度、密度及溫度等分佈狀況；並利用模擬所獲得之數據配合已知之砲口條件衝擊砲口制退器之折流板，造成火砲後座部份向前之動量，用以降低後座力，求出火砲裝置砲口制退器後，以砲口效率為主之各項相關參數。 經以單板、雙板及三板共三種折流板式砲口制退器進行流場模擬後應力分析及模態分析，所得之等效應力與材料降服強度相比得安全係數，分別為2.5、2.1及4.8，第一組模態之自然頻率分別為12.08Hz、11.64Hz及9.95Hz，砲口效率則分別為31.5%、38.6%及33.7%。 輕量化折流板砲口制退器設計，除效率高達39.4%之外，尚有重量輕及製造容易等優點，經成功的引用拓樸最佳化原理，得知此砲口制退器低應力部份位於氣孔後方，約可移除70%體積，進而使裝配時間縮短，達到DFA之目的。
並列摘要
Two main types of muzzle brakes named baffle type and light weight type have been designed for carrying out the simulation and analysis of muzzle flow in this research. The utilizing of parameters from simulations and some given conditions to impact deflectors of muzzle brakes to make the recoil part get a momentum to move forward in order to lower recoil force have been expressed in this research as well. Via performing flow field simulation, stress analysis and modal analysis of single baffle, double-baffle and triple-baffle muzzle brakes, safety factors were 2.5, 2.1 and 4.8 respectively, nature frequencies were 12.08Hz, 11.64Hz and 9.95Hz respectively, and muzzle efficiencies were 31.5%, 38.6% and 33.7% respectively. The light weight muzzle brake owns a high efficiency to 39.4%, in the same time it owns benefit by light weight and easy manufacture. Through the using of topology theory, the lower stress area could be removed about 70% volume and shorten assembly time to reach the goal of DFA.