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
I am not so much of a movie-goer as I was many years ago,for time changes everything.It does notnecessarily mean I am suffering a dementia,a cognitive impairment that is genetically-predestined for the aged,but not fo...I am not so much of a movie-goer as I was many years ago,for time changes everything.It does notnecessarily mean I am suffering a dementia,a cognitive impairment that is genetically-predestined for the aged,but not for the man getting on in years,and absolutely not for me at my prime age.A movie titled'You've got amail',starring Tom Hanks and Meg Ryan,is a very impressive one that is explicitly printed and vividly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I am not so much of a movie-goer as I was many years ago,for time changes everything.It does notnecessarily mean I am suffering a dementia,a cognitive impairment that is genetically-predestined for the aged,but not for the man getting on in years,and absolutely not for me at my prime age.A movie titled'You've got amail',starring Tom Hanks and Meg Ryan,is a very impressive one that is explicitly printed and vividly