炮口冲击波作用下车载炮驾驶室支撑条件对其内流场超压的影响

打开文本图片集

中图分类号：O389;TJ301 国标学科代码：13035；1302070 文献标志码：A

Abstract：During firing ofa truck-mounted howitzer，the crew compartment structure deforms elasticall due to the muzzle blastload，creating pressuredisturbancesintheinteralflowfieldofcabin.Theresultingoverpressurecausesasignificant threatto personnelandequipmentsafety.Tomeet drivingrequirements，thecrewcompartmentofthe truck-mounted howitzer is suspended onthechassis frame via an elastic support structure.Atthe same time，thestiffnessanddamping of thesupport structureareimportant factors affectingthe deformationresponseof thecabin structureunderthe impact ofthe muzzle blast load.Therefore，adjusting thesupport parameterstooptimize theflow field environment insidethecrewcompartment demonstrateshigh practicalutility.To investigate theeffctsof differentcabin supportconditions onthe flow field overpressure inside thecrewcompartmentofatruck-mounted howitzer，a foreign trade typeof equipment was takenas the object.Anentire path numerical model simulating the shock wave propagation from thecannon's muzle to theinteriorof the cabinunder extreme firing conditions was established.Systematicvalidation tests were conducted，capturing overpresuredata inboththeexteraland intealflowfieldsofthecrewcompartment，aswellastheaccelerationofthecabinstructure.Based onthevalidated numerical model，simulations were performed tocalculatethe structural responsesand intermal flowfield overpressures under eight diferent supportconditions.Theresults indicate that while diferent areas withinthecabin exhibit varyingsnsitivitytochanges insupportconditions，creasingthesupportstifessleads tosignificantreductionsinthepeak accelerationandvelocityofthecabinstructure，aswellasadecrease inthepeakoverpressrewithinthe interal flow field. However，the presence of damping in the support structure significantly enhances the aceleration response of the cabin structure，yetitfurtherdiminishesitsvelocityresponseandlowerthepeakoverpressure intheintealflowfieldofthecrew compartment.

Keywords：truck-mounted howitzer; muzzle blast;flow field inside thecrew compartment; support condition; flow-structure interaction

车载炮是火炮、弹药、轮式军用卡车底盘与信息化系统有机组成的一类轮式自行火炮，射击时，高速、高压的炮口冲击波在驾驶室表面形成恶劣超压分布的同时[2]，会使驾驶室内部流场产生强度较高的压力波动3，严重威胁车内人员和设备安全。（剩余20435字）