新型重载舰船设备冲击试验台机理分析与仿真

MECHANISM ANALYSIS AND SIMULATION FOR A NOVEL ANTI-SHOCK TESTING SYSTEM FOR HEAVY-WEIGHT SHIPBOARD EQUIPMENT

为了提高舰船及其设备的抗冲击能力,满足最新抗冲击标准的要求,同时提高传统冲击试验机的最大测试能力,提出了一套全液压驱动的新型重载舰船设备抗冲击试验系统模型,以解决系统高能量存储及瞬间释放和避免二次撞击的关键问题,构建了系统非线性动力学模型,并利用数值计算方法考察了在不同冲击速度测试条件下冲击机系统所能达到的预期性能,结果表明:该系统可以产生与最新抗冲击标准BV043/85和MIL-S-901D相吻合的冲击加速度波形,同时可根据不断提高的抗冲击标准以及测试能力要求进行相应的扩展。

In order to improve the shock resistance of shipboard equipment as well as to increase the testing capability of the shock testing system, a novel high-energy hydraulically-actuated anti-shock testing system is proposed. The key techniques to store and release high energy instantly, and to avoid second impacting during shock tests are related with a novel velocity generator. A nonlinear dynamic model of this system is established, which can produce the required shock pulse in a given time duration. Then a numerical simulation about the system is carried out to evaluate the prospective capability of the shock testing machine under different shock velocity inputs. The simulation results show that the shock testing machine proposed in this paper can produce nearly the same shock acceleration waveform as opecified by the new shock resistance standard BV043/85 and MIL-S-901D. Moreover, this shock testing machine can be adjusted conveniently to test different types of equipment and be extended easily to satisfy more severe shock standard and heavier equipment.