长征五号运载火箭助推器偏置集中与低温内压耦合加载试验技术研究

Eccentric Concentrated Force Loading and Pressure Low Temperature Coupling Test of the Long March 5 Booster

长征五号运载火箭采用了以液体助推器前捆绑接头为主传力点的设计构型,在飞行服役中,助推器捆绑接头将承受2000kN以上的偏置大集中载荷。针对全新构型与全新承载形式带来的助推器试验加载、安全防护以及测量等技术难题,研究了偏置大集中载荷施加与控制技术,开发了大弯矩载荷作用的防倾覆承载与深低温高压穿舱测量等试验装置,并实施完成了多项偏置大集中载荷试验,为新一代运载火箭的成功研制提供了可靠保障。

The front part of liquid-propellant booster is the main structure undertaking and transferring mechanical forces,i.e.axial loading,which would exceed 2000kN during the flight of Long March 5 launch vehicle.The unique design of the booster and its consequent force-loading fashion have brought new technical problems in ground test.The procedures of force loading,sensors development and its calibration and the safety measures are proposed for a more efficient and accurate ground test for the new-era launch vehicle.A specific mechanism for large and focused force loading,an anti-overturn device and a measuring device for deep cold environment have been developed and used in real test successfully.These new technologies and noble devices are essential and curtail for ground test,which would guarantee a prospective first flight of the new-era launch vehicle.