根据运载火箭发射台机械结构及承载的特点,对三维结构进行合理简化并构造了对应的力学模型,在力学模型的基础上提出了刚度设计的解析算法。为验证文中方法的有效性,文中分析了外部载荷、横梁宽度以及横梁高度等关键参数对发射台刚度的影...根据运载火箭发射台机械结构及承载的特点,对三维结构进行合理简化并构造了对应的力学模型,在力学模型的基础上提出了刚度设计的解析算法。为验证文中方法的有效性,文中分析了外部载荷、横梁宽度以及横梁高度等关键参数对发射台刚度的影响,并与有限单元法(Finite Element Method,FEM)计算结果进行对比分析,结果显示解析算法可以有效地预示发射台支腿位置变形量,且计算效率明显优于有限单元法。综合解析算法的计算精度及效率,其在类似结构的刚度设计及结构优化方面具有工程应用价值。展开更多
It＇s June 26th, the day when Chinese space crew orbit back home as scheduled after 15-day space lab mission. Over two weeks ago, Chinese Shenzhou-10 spacecraft, propelled by a Long-March 2F, blasted off to arrow into...It＇s June 26th, the day when Chinese space crew orbit back home as scheduled after 15-day space lab mission. Over two weeks ago, Chinese Shenzhou-10 spacecraft, propelled by a Long-March 2F, blasted off to arrow into the empty cerulean sky from the flat ＆ arid expanse in Gobi Desert of Jiuquan city, China＇s satellite ＆ spacecraft launch centre, remote in the far northwest of the country＇s domain. We were all pulsing with every actuated code of movement designed to set off the rocket at the launch pad, seeing the craft find its way to the right orbit, docking with Tiangong-1 （Celestial Palace-I）, the Chinese space lab already over there. Our pulses were throbbing with these three astronauts all the way through the entire process of this manned space mission, and our hearts rose to the throats when the craft was making the trek in the predetermined direction toward the earth, and our heroes back home, safe and sound.展开更多
文摘根据运载火箭发射台机械结构及承载的特点,对三维结构进行合理简化并构造了对应的力学模型,在力学模型的基础上提出了刚度设计的解析算法。为验证文中方法的有效性,文中分析了外部载荷、横梁宽度以及横梁高度等关键参数对发射台刚度的影响,并与有限单元法(Finite Element Method,FEM)计算结果进行对比分析,结果显示解析算法可以有效地预示发射台支腿位置变形量,且计算效率明显优于有限单元法。综合解析算法的计算精度及效率,其在类似结构的刚度设计及结构优化方面具有工程应用价值。
文摘It＇s June 26th, the day when Chinese space crew orbit back home as scheduled after 15-day space lab mission. Over two weeks ago, Chinese Shenzhou-10 spacecraft, propelled by a Long-March 2F, blasted off to arrow into the empty cerulean sky from the flat ＆ arid expanse in Gobi Desert of Jiuquan city, China＇s satellite ＆ spacecraft launch centre, remote in the far northwest of the country＇s domain. We were all pulsing with every actuated code of movement designed to set off the rocket at the launch pad, seeing the craft find its way to the right orbit, docking with Tiangong-1 （Celestial Palace-I）, the Chinese space lab already over there. Our pulses were throbbing with these three astronauts all the way through the entire process of this manned space mission, and our hearts rose to the throats when the craft was making the trek in the predetermined direction toward the earth, and our heroes back home, safe and sound.
