【摘要】：為分析輸送鏈條的動力學(xué)特性和彈藥的穩(wěn)定性,將所有鏈節(jié)及彈架兩側(cè)雙排滾子簡化為彈簧阻尼單元,采用多體系統(tǒng)動力學(xué)和運(yùn)動彈性動力學(xué)理論,建立輸送鏈條的完整動力學(xué)模型和彈藥的穩(wěn)定性模型。借助Matlab軟件,對輸送鏈條的整體動力學(xué)模型進(jìn)行數(shù)值仿真,并求解彈藥的穩(wěn)定性模型。通過數(shù)值仿真結(jié)果可知:在不同驅(qū)動功率下輸送鏈條的速度、加速度均窄幅波動;軌跡線的形狀特征決定了彈藥離心力的動力學(xué)響應(yīng)和突變特性,離心力的突變特性對彈藥運(yùn)動法線方向穩(wěn)定性具有較大的影響,而彈藥在運(yùn)動切線方向上的穩(wěn)定性主要受自身慣性和輸送鏈條的動力學(xué)參數(shù)影響。根據(jù)彈藥上部的擺動位移響應(yīng)可知,彈藥在運(yùn)動法線方向和切線方向具有較好的動態(tài)穩(wěn)定性。采用試驗(yàn)測量方法,得到輸送鏈條的切線方向加速度與彈架的法線方向加速度值,測量數(shù)據(jù)與仿真結(jié)果較為吻合。
[Abstract]:In order to analyze the dynamic characteristics of the conveying chain and the stability of the ammunition, the double row rollers on both sides of the chain and the frame are simplified as spring damping elements. The theory of multi-body system dynamics and kinematic elastic dynamics is adopted. The complete dynamic model of the conveying chain and the stability model of the ammunition are established. With the help of Matlab software, the whole dynamic model of conveying chain is simulated, and the stability model of ammunition is solved. The results of numerical simulation show that the velocity and acceleration of the conveying chain fluctuate in narrow range under different driving power. The shape characteristic of trajectory line determines the dynamic response and abrupt characteristic of ammunition centrifugal force, and the abrupt characteristic of centrifugal force has a great influence on the stability of the normal direction of ammunition motion. The stability of ammunition in the tangent direction of motion is mainly influenced by its inertia and the dynamic parameters of the conveying chain. According to the swinging displacement response of the upper part of the ammunition, it can be seen that the ammunition has good dynamic stability in the normal direction and tangent direction. The tangent acceleration of the conveying chain and the normal acceleration of the projectile are obtained by using the experimental measurement method. The measured data are in good agreement with the simulation results.
【作者單位】： 北京工業(yè)大學(xué)機(jī)械工程與應(yīng)用電子技術(shù)學(xué)院;北京航空航天大學(xué)機(jī)械工程及自動化學(xué)院;
【基金】：中國博士后科學(xué)基金項(xiàng)目(2016M600021) 國家自然科學(xué)基金項(xiàng)目(61273342、51675008)
【分類號】：TJ810.37
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本文編號：2470051