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fa-link"></i>網絡整理<i class="fa fa-user"></i>夾春卷</div> <div class="logcon"> <p>　　<strong>從一箭三星到一箭二十星</strong></p> <p>　　<strong>揭秘長二丙火箭新“帽子”</strong></p> <p>　　近日，長征二號丙遙五十一運載火箭(簡稱長二丙火箭)搭檔遠征一號S遙二上面級，在酒泉衛星發射中心以“一箭三星”方式，將3顆通信技術試驗衛星成功送入預定軌道。</p> <p>　　本次任務是長二丙火箭新型整流罩的首飛。據長二丙火箭總體主任設計師李君介紹，本次發射的長征二號丙火箭首次應用4.2米直徑整流罩。就像大房間能放更多家具，4.2米直徑整流罩的直徑變大，能給衛星提供更大的可用結構空間，有利于多星發射布局的優化。未來，4.2米直徑整流罩將逐步成為長二丙火箭發射任務的常態配置。 <br /></p> <p>　　據介紹，4.2米整流罩的氣動面積較3.35直徑整流罩大40%，氣動載荷同步增加，保障飛行時的氣動載荷安全成為發射的關鍵環節之一。與此同時，4.2米直徑整流罩的卸車、轉運、吊裝均需采用新方式和新工裝。為此，研制團隊全程采用明確狀態、演練流程、總結優化、正式實施的現場迭代準則，保障了操作到位、結果正確。</p> <p>　　本次發射的長二丙火箭還研制了一項新產品：1.35米直徑中心承力筒。以前衛星與火箭連接時，多采用底部支撐結構，新研制的中心承力筒則通過側掛方式實現火箭與衛星的機械連接。采用多段中心承力筒串聯便可實現多星發射，既避免了串聯方案衛星支撐結構的多次分離風險，也降低了結構重量。如今，中心承力筒結構方案已漸成星座發射任務的趨勢，長征二號丙火箭后續將有一箭二十星的發射任務。</p> <p>　　面對任務周期緊的考驗，長二丙型號隊伍在有效管控技術風險的同時，顯著降低了研制成本、縮短了研制周期。中心承力筒通過選用成熟材料、成熟工藝，直接進入飛行產品生產；4.2米直徑整流罩通過成熟模塊組合，節省了新工裝研制和結構部段試驗驗證環節。如此一來，一年時間內便讓新構型火箭具備了飛行條件，實現了低成本高效率的預期目標。</p> <p>　　今年是長二丙火箭的持續高密度發射之年，試驗隊還將同步開展長征二號丙遙四十一、遠征1S遙四上面級的總裝測試。</p> </div> 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