📚 Interdisciplinary Integrated Problem-Solving for Year 10 Cambridge Engineering | 剑桥Year 10工程跨学科综合题型训练
In Cambridge Year 10 Engineering, mastering interdisciplinary problem-solving is essential. Real-world engineering challenges combine mechanics, electronics, material science, and sustainability. This revision guide provides integrated question training to help you connect concepts and tackle exam-style problems confidently.
在剑桥Year 10工程中，掌握跨学科问题解决能力至关重要。真实世界的工程挑战结合了力学、电子学、材料科学与可持续性。本复习指南提供综合题型训练，帮助你串联概念，自信应对考试风格的问题。
1. The Engineering Design Process | 工程设计流程
Every engineering project starts with defining a problem, researching requirements, and developing a design brief. Then you generate concepts, select the most promising solution, and refine it through modelling and prototyping.
每个工程项目都从定义问题、研究需求和制定设计概要开始。接着生成概念，选择最有前景的方案，并通过建模和原型制作进行优化。
Cross-disciplinary thinking is vital at each stage. For example, a ventilation system design must consider structural strength (mechanics), actuator selection (electronics), thermal expansion (materials), and energy use (sustainability).
跨学科思维在每一阶段都至关重要。例如，通风系统设计必须考虑结构强度（力学）、执行器选择（电子学）、热膨胀（材料）和能源消耗（可持续性）。
2. Mechanics of Structures | 结构力学
here d is the distance from the support. The bending stress σ must not exceed the material's yield strength.
当悬臂梁在自由端支撑载荷F时，最大弯矩M由M = F × d给出，其中d是到支撑点的距离。弯曲应力σ不得超过材料的屈服强度。
M = F × d
σ = M/Z below 200 MPa requires cross-disciplinary selection of material and cross-section.
例如，若500 N的载荷作用在距墙0.3 m处，M = 150 N·m。选择截面模量Z以使σ = M/Z低于200 MPa，需要跨学科选择材料和截面形状。
ce and mathematics. You may need to calculate Z for a rectangular section as Z = b h² / 6.
这与材料科学和数学相关联。你可能需要计算矩形截面的Z = b h² / 6。
3. Electrical Systems and Power | 电气系统与功率
An automated window actuator may require a DC motor. To select the motor, calculate the required power. If the window needs 40 N of force and moves at 0.05 m/s, mechanical power Pmech = F × v = 40 N × 0.05 m/s = 2 W. Considering motor efficiency (say 80%), electrical power input Pelec = Pmech / 0.8 = 2.5 W.
一个自动窗户执行器可能需要直流电机。要选择电机，需计算所需功率。若窗户需要40 N的力，以0.05 m/s移动，机械功率Pmech = F × v = 40 N × 0.05 m/s = 2 W。考虑电机效率（如80%），输入电功率Pelec = Pmech / 0.8 = 2.5 W。
P = V × I
If the available supply is 12 V, the current draw I = Pelec / 12 ≈ 0.21 A. You must also consider stall current and choose a suitable driver circuit.
如果可用电源为12 V，电流I = Pelec / 12 ≈ 0.21 A。你还必须考虑堵转电流并选择合适的驱动电路。
4. Material Properties and Selection | 材料特性与选择
Selecting the right material involves comparing strength, weight, and corrosion resistance. Below is a typical comparison for a greenhouse vent frame:
选择合适的材料需要比较强度、重量和耐腐蚀性。以下是温室通风口框架的典型对比：
| Property | Aluminium Alloy | Mild Steel |
|---|---|---|
| Density (kg/m³) | 2700 | 7850 |
| Yield Strength (MPa) | 250 | 350 |
| Corrosion Resistance | Excellent | Poor (requires coating) |
htweight aluminium reduces motor load but is more expensive. This decision integrates mechanics, cost, and sustainability.
对于体积0.0002 m³，铝质量 = 0.54 kg，钢质量 = 1.57 kg。轻质的铝可降低电机负载，但成本更高。这个决定整合了力学、成本和可持续性。
5. Thermal Expansion and Design Tolerances | 热膨胀与设计公差
°C. A 2 m aluminium frame experiencing a temperature rise of 30°C will elongate by ΔL = 23×10⁻⁶ × 2 × 30 = 1.38 mm.
当温度变化时，材料会膨胀。线膨胀量ΔL = α L₀ ΔT，其中α是线膨胀系数。对铝
Published by TutorHao | Year 10 工程 Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图