一种全复合材料卫星天线承力筒的研制

Development of All-composite Bearing Cylinder for Satellite Antenna

针对卫星天线承力筒轻质、高轴向模量、低轴向热膨胀的需求，文章开展了承力筒总体成型方案设计、材料基础热力学性能测试及产品试制等工作，并通过了实验考核。结果表明：对于材料的热力学性能，按经纬向比例1︰2编织的M40J炭布层压板在常温下纬向拉伸模量为118GPa，纬向拉伸强度为771MPa；在（-190～150）℃范围内，纬向热膨胀系数为（0.3～1.4）×10-6℃-1，经向热膨胀系数为（0.3～5.3）×10-6℃-1。该复合材料承力筒比铝质承力筒质量减少40%以上。复合材料承力筒经过（-170～120）℃/24h、6.5个循环的高低温循环实验考核，产品无残余变形，内部未出现开裂、分层等现象。

According to the demands of light-weight, high axial modulus and low axial thermal expansion, a general process project design, thermodynamics properties test of material, and product manufacture have been carried out. And the product has been checked through experiment. As a result, we get the following thermodynamic properties of material. With regard to M40J carbon cloth laminate that is braided as 1 ： 2 proportion in warp and weft directions, the tension modulus and strength are l lSGPa and 771MPa in weft direction in room temperature respectively; thermal expansion coefficients are between 0.3～10-6℃-1 and 1.4×10-6℃-1 respectively direction and between 0.3×10-6℃-1 and 5.3～10-6℃-1 in warp direction in （-190-150）℃, respectively. All-composite bearing cylinder is lighter above 40% than aluminum bearing cylinder. The bearing cylinder experienced the high ＆ low temperature experiment with the conditions of （-170-120）℃/24h and 6.5 cycles. In the end, the product has no residual deformation, no cracking and no delamination.