摘要
基于三维循环对称有限元模型,阐述飞机刹车副制动过程中温度场的计算方法;讨论边界条件和各相关参数的确定方法;应用有限元软件ANSYS对粉末冶金飞机刹车副温度场进行仿真,研究摩擦材料物性参数对温度场的影响。研究结果表明:1)增大摩擦材料热导率和增大其蓄热能力都能降低刹车副最高温度值,但蓄热能力对刹车副最高温度影响更大;2)测温点最高温度出现时刻主要跟摩擦材料热扩散率有关,热扩散率越大,测温点温度达到最大值所用时间越短;3)保持其他参数不变,增大摩擦材料热导率能降低摩擦片轴向最大温度梯度,而增大其蓄热能力却使摩擦片轴向最大温度梯度增大。
The calculation method of temperature field of brake for aircraft was elucidated on the basis of 3-dimentional cyclic-symmetric finite element model. The temperature field of the brake for aircraft is calculated by applying ANSYS, a kind of finite element analysis software, by changing thermal parameters of the friction material. Calculation results show that： 1） by increasing the conductivity of the friction material, the potential trouble of tyre explosion can be eliminated, and the danger of the friction area cracking by uneven thermal expansion can be decreased; 2） the highest temperature of the whole brake can be decreased by increasing the conductivity or the thermal capability of the friction material, however, change of the thermal capability will be more effective; 3） Under the condition of keeping the other parameters unchanged, increasing the conductivity of the friction material will greatly decrease the axial temperature gradients of the brake＇s friction disc, whilst increasing the thermal capability will increase the axial temperature gradients of the brake.
出处
《粉末冶金材料科学与工程》
EI
2007年第5期305-309,共5页
Materials Science and Engineering of Powder Metallurgy
基金
国家高技术研究发展计划(863计划)资助项目(AA200603Z508)
关键词
飞机刹车副
摩擦材料
温度场
有限元
brake for aircraft
friction materials
temperature field
finite element
