Research On Mechanical Environment Adaptability Design Of Lightweight Torpedo Borne Computer

As an important branch of torpedo,lightweight torpedo is mainly used for anti-submarine warfare.It can be launched by surface ship through launching tube,be delivered by anti-submarine helicopter or anti-submarine fixed wing aircraft,or be used as anti-submarine missile for remote delivery.In charge of torpedo information processing and instruction dispatch,the torpedo borne computer occupies an important role in torpedo borne equipments.The characteristics of multi-platform using of lightweight torpedo determine that the borne computer will experience complex mechanical environment during its whole life cycle.Severe faults such as the failure of borne computer were caused by harsher mechanical environment in the earlier experiments.Therefore,carrying out borne computer mechanical environment adaptability design work via simulation calculation and experimental verification based on combined mechanical environment of lightweight torpedo,and eventually forming a complete set of mechanical environment adaptability design process and method have important theoretical significance and practical value.Supported by relevant theories,the research work is carried out by comparing between numerical simulation and experimental verification.Firstly,the typical mechanical environment is determined by combining multi-platform mechanical environment of lightweight torpedo.Then,the vibration data of the borne computer’s install base is calculated based on the measured data.Thirdly,the performance evaluation and optimization design of the borne computer’s vibration isolation system are carried out using vibration data as design input.Finally,the impact isolation performance of the isolation system is studied and evaluated.The following achievements are obtained in this paper:1)Based on modal theory,the vibration environment calculation model of the lightweight torpedo’s electronic cabinet is established through the method of comparison and correction between finite element calculation result and modal test result.The vibration data of the borne computer’s install base is calculated by using cabinet’s vibration data as input.2)Verificated by the experiment,the performance evaluation model of the borne computer’s vibration isolation system is established.Based on the vibration isolation theory,the optimization targets are put forward by using vibration data as input.The optimization design is carried out by changing material and geometry of the isolator,forming complete vibration isolation process and method.3)According to the highly nonlinear characteristics of impact problems,the impact simulation model of the torpedo borne computer is established based on explicit dynamic algorithm.The modeling method is proved to be correct by comparing the impact response calculation result with the experiment result.And the impact isolation performance of the optimization design scheme is evaluated.4)The optimization scheme of mechanical environment adaptability design is superior to the current design both in vibration and impact isolation.The energy of the main vibration spectrum decreased by 83.2% under flying condition,by 68.5% under running condition.The peak value of acceleration decreased by 34.4% under impact load.The mechanical environment adaptability design has achieved good results.