flutter speed

简明释义

颤振速率

英英释义

例句

1.The drone's flutter speed 抖动速度 increased as it encountered strong winds.

当无人机遭遇强风时，其flutter speed 抖动速度增加。

2.High flutter speed 抖动速度 can lead to structural failures in aircraft wings.

高flutter speed 抖动速度可能导致飞机机翼的结构失效。

3.Engineers measured the flutter speed 抖动速度 during the test flight to ensure safety.

工程师在测试飞行中测量了flutter speed 抖动速度以确保安全。

4.To achieve stable flight, the pilot had to adjust the flutter speed 抖动速度 of the aircraft.

为了实现稳定飞行，飞行员必须调整飞机的flutter speed 抖动速度。

5.The research focused on the effects of flutter speed 抖动速度 on different wing designs.

该研究集中于flutter speed 抖动速度对不同机翼设计的影响。

作文

In the world of aviation and aerodynamics, the term flutter speed refers to a critical velocity at which an aircraft or any structure begins to experience oscillations due to aerodynamic forces. Understanding flutter speed is essential for engineers and pilots alike, as it plays a significant role in the safety and performance of flying vehicles. When an aircraft reaches this speed, the aerodynamic forces acting on its wings and other surfaces can cause them to vibrate uncontrollably. This phenomenon can lead to catastrophic structural failure if not properly managed.The concept of flutter speed is rooted in the principles of dynamics and fluid mechanics. As an aircraft accelerates, the airflow over its wings changes, leading to variations in lift and drag. At certain speeds, the natural frequency of the wing's vibration can align with the frequency of the aerodynamic forces, resulting in a resonant condition. This resonance amplifies the vibrations, causing the wing to 'flutter.'To illustrate the importance of flutter speed, consider the case of the infamous Tacoma Narrows Bridge collapse in 1940. While not an aircraft, the bridge experienced flutter due to wind-induced oscillations, ultimately leading to its failure. Engineers learned valuable lessons from this incident, emphasizing the need for thorough testing and analysis of structures subjected to dynamic loads.In aviation, determining the flutter speed of an aircraft is a crucial part of the design process. Engineers use wind tunnel testing and computer simulations to analyze how different designs will behave at various speeds. By identifying the flutter speed, they can implement design features that mitigate the risk of flutter, such as stiffening the structure or altering the shape of the wings.Pilots must also be aware of flutter speed when operating an aircraft. During flight training, pilots learn about the importance of maintaining speeds below the flutter threshold, particularly during maneuvers that involve rapid changes in altitude or direction. Exceeding the flutter speed can lead to a loss of control and potentially disastrous outcomes.Moreover, flutter speed is not a fixed value; it can vary based on several factors, including the weight of the aircraft, its configuration, and environmental conditions such as air density and temperature. Therefore, continuous monitoring and adjustments are necessary to ensure safe flight operations.In summary, the term flutter speed encapsulates a fundamental aspect of aerospace engineering and flight safety. It highlights the delicate balance between speed, aerodynamics, and structural integrity. By understanding and respecting the limits imposed by flutter speed, engineers and pilots can work together to ensure the safety and efficiency of modern aviation. The lessons learned from past failures continue to shape the future of aircraft design and operation, making the study of flutter speed not just a technical necessity, but a vital component of aviation history and progress.

在航空和空气动力学的世界中，术语flutter speed指的是一种临界速度，在该速度下，飞机或任何结构开始因气动力而经历振荡。理解flutter speed对工程师和飞行员来说都至关重要，因为它在飞行器的安全性和性能中扮演着重要角色。当飞机达到这一速度时，作用于机翼和其他表面的气动力可能导致它们无法控制地振动。这种现象如果不加以管理，可能会导致灾难性的结构失效。flutter speed的概念根植于动态学和流体力学的原理。当飞机加速时，机翼上的气流发生变化，导致升力和阻力的变化。在某些速度下，机翼振动的自然频率可能与气动力的频率对齐，从而导致共振状态。这种共振会放大振动，导致机翼“颤动”。为了说明flutter speed的重要性，可以考虑1940年臭名昭著的塔科马海峡大桥倒塌事件。虽然不是飞机，这座桥由于风引起的振荡经历了颤动，最终导致其失败。工程师们从这次事件中吸取了宝贵的教训，强调了对承受动态载荷的结构进行彻底测试和分析的必要性。在航空领域，确定飞机的flutter speed是设计过程中的关键部分。工程师使用风洞测试和计算机模拟来分析不同设计在各种速度下的表现。通过识别flutter speed，他们可以实施设计特征，以减轻颤动的风险，例如加固结构或改变机翼的形状。飞行员在操作飞机时也必须意识到flutter speed。在飞行训练中，飞行员学习保持低于颤动阈值的速度的重要性，特别是在涉及快速变化高度或方向的机动过程中。超过flutter speed可能导致失去控制，并可能导致灾难性的后果。此外，flutter speed并不是一个固定值；它可能会因多个因素而异，包括飞机的重量、配置以及环境条件，如空气密度和温度。因此，持续的监测和调整是确保安全飞行操作所必需的。总之，术语flutter speed概括了航空工程和飞行安全的一个基本方面。它突显了速度、空气动力学和结构完整性之间的微妙平衡。通过理解和尊重flutter speed所施加的限制，工程师和飞行员可以共同努力，确保现代航空的安全和效率。从过去失败中吸取的教训继续塑造飞机设计和操作的未来，使对flutter speed的研究不仅仅是一项技术必要性，而是航空历史和进步的重要组成部分。