【摘要】 针对第1代490 N发动机复合材料支架和第2代490 N发动机钛合金支架难以同时满足耐高温和轻量化双重要求的问题，设计一种应用耐高温双马树脂基复合材料的第2代490 N发动机支架，并开展了分析验证和试验验证。验证结果表明：其能够承受各种复杂工况下的力、热载荷，相比第1代490 N发动机复合材料支架，可将耐温能力由100℃提高至200℃,相比第2代490 N发动机钛合金支架，可实现结构质量减小57.7%。耐高温复合材料支架已成功应用于多个航天器，可为航天器高质量发射和精确变轨提供可靠的技术保障。更多还原

【Abstract】 In response to the challenge that the first-generation 490N engine composite bracket and the second-generation 490N engine titanium alloy bracket cannot simultaneously meet the high-temperature resistance and light weight requirements, a second-generation 490N engine bracket is designed by using high-temperature resistant bismaleimide resin composite materials, and analysis verification and test verification are conducted. The verification results demonstrate that this bracket can withstand both mechanical and thermal workloads under complex operating conditions. Compared to the first-generation 490N engine composite material bracket, the heat resis tance has been increased from 100℃ to 200℃, and compared to the second-generation 490N engine titanium alloy bracket, the structure has achieved a weight reduction of 57.7%. This high-temperature resistant composite material bracket has been successfully applied to multiple spacecraft, providing reliable technical support for their high-quality launches and precise orbit adjustments.更多还原