全尺寸内埋武器舱舱门铰链力矩测量方法

A hinge moment measuring method for the full scale internal weapon cavity door

全尺寸内埋武器舱舱门铰链力矩测力试验使用真实弹舱模型,为了不破坏武器弹舱的完整性,它既不允许在模型上安装铰链力矩天平来完成铰链力矩的测量,也不允许在舱门表面加工测压孔,通过测压试验的方法进行铰链力矩的测量。根据对全尺寸内埋武器舱舱门的结构特点及受载情况进行分析,提出了全尺寸内埋武器弹舱舱门铰链力矩的测量方法:专门设计的模拟短梁及加载装置,既可以实现单点加载也可以多点同时加载;在旋转作动器的耳片上粘贴A、B 2组应变计,分别组成半桥工作模式;舱门安装前,使用模拟短梁及加载装置,对各个耳片单独施加力和力矩载荷,通过叠加法、均值法求取铰链力矩公式;舱门安装后,利用大小舱门间的转轴及加载装置,对舱门实施单点加载或多点同时施加不同载荷,通过迭代法验证铰链力矩公式的可靠性,较好地实现了真实弹舱舱门铰链力矩的测量。

The real weapon cavity model is used in the hinge moment measurement test of the full scale internal weapon cavity door.It is not allowed to install the special hinge moment balance on the weapon cavity door for measuring the hinge moment.Besides,it is not allowed to process holes on the weapon cavity door＇s surface for measuring the hinge moment by pressure measurement.The hinge moment measurement method for the weapon cavity door is put forward：the simulation short beam and the loading device are specially designed to ensure consistency of the calibration state and the test state and to achieve the single-point loading and multi-point loading simultaneously;the strain gauge is sticked on the ear-flake of actuator,which is made of the half-bridge;before the weapon cavity door installation,varying force and moment are exerted on each ear-flake of the actuator independently to acquire the hinge moment formula by using superposition method and average method,and after the weapon cavity door installation,varying force and moment are exerted on the ear-flake of the actuator at a single-point or multiple-points simultaneously to verify the hinge moment formula by using iterative method.The calibration of hinge moment is accomplished in this way.The hinge moment acting on the weapon cavity door is acquired in wind tunnel test.