The test shell without projectile belt is widely used in the teaching, inspection and maintenance of modern automatic naval guns. In order to ensure the normal work of each mechanism, it is very important to design the buffer and limit of the test shell during the process of entering the bore. Taking a certain type of medium caliber naval gun as the research object, the design of colloidal fluid damper and cartridge lock was proposed to ensure the reliability of entering the bore and closing the breechblock. By combining the simulation methods of computational fluid dynamics (CFD) and multibody system dynamic (MBD), it was analyzed whether the structural design can meet the engineering requirements. The research results show that the colloidal fluid damper can dissipate a large amount of kinetic energy of the shell, and the cartridge lock can limit the rebound movement. The combination of the two ensures the smooth process of closing the breechblock. The research provides a design method for the process of the test shell entering the bore, and provides theoretical support for the feasibility of the method.

无弹带试验炮弹广泛用于现代自动舰炮的教学、检查和维修。为保证各机构的正常工作，设计试验壳体进孔过程中的缓冲和限位非常重要。以某型中口径舰炮为研究对象，提出了胶体流体阻尼器和弹锁设计，以保证进膛和闭膛的可靠性。通过结合计算流体动力学（CFD）和多体系统动力学（MBD）的仿真方法，分析了结构设计是否满足工程要求。研究结果表明，胶体流体阻尼器可以耗散壳体的大量动能，并且墨盒锁可以限制回弹运动。两者的结合确保了关闭后膛块的顺利进行。该研究为试验壳进入膛内的过程提供了一种设计方法，为该方法的可行性提供了理论支持。