带橡胶缓冲垫的出弹装置碰撞有限元分析

齿轮齿条式出弹装置刚性顶杆与炮弹之间存在瞬时碰撞问题.为减小碰撞力,在顶杆端部增加橡胶缓冲垫.采用Mooney-Rivlin模型建立了橡胶缓冲垫的本构模型,并用有限元ANSYS/Workbench软件对带橡胶缓冲垫的出弹装置和炮弹的接触碰撞特性进行数值模拟研究.分析结果表明:带橡胶缓冲垫的顶杆与炮弹的碰撞过程中,炮弹所受的最大应力为1.2387 MPa,远小于炮弹外壳材料的屈服强度;齿轮和齿条的齿面接触应力安全系数分别为3.77和3.81;齿根接触应力安全系数分别为4.03和3.53,均达到较高可靠度时最小安全系数的要求.

Collision finite element analysis of the jacking shells device with rubber cushion

There exists instantaneous collision problem between the rigid mandrel and shells in the rack and pinion jacking shells device. To reduce the collision force, the rubber buffer is added to the end of the jack. Based on the Mooney-Rivlin model, the constitutive model of rubber cushion is established, and the numerical simulation of the collision characteristics between jacking shells device and shells is researched with ANSYS/Workbench. The analysis results show that in the collision process, the maximum stress of the shells is 1.238 7 MPa, far less than the yield strength of the enclosure material of the shells;the tooth contact stress safety factors of rack and pinion are 3.77 and 3.81, respectively, and the tooth root contact stress safety factors are 4.03 and 3.53, respectively, reaching the mini-mum safety factor in a higher reliability requirement.