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- aerodynamic noise test 气动噪声试验
- An aerodynamic noise is confirmed to be the strongest one according to the test and analysis of the frequency spectrum of the noise from LGA fan. 通过对LGA风机噪声频谱的测试分析,确认其空气动力性噪声最强。
- An aerodynamic noise is confirmed to be the strongest of the noise from VW 0.22/7 B air compressor. VW - 0 2 2 7-B型空压机的噪声源 ,其空气动力性噪声最强。
- Finally, the achievements of aerodynamic noise in turbomachinery is summarized and prospect is advised. 最后对叶轮机械气动噪声的研究现状进行了总结并对今后的研究工作进行了展望。
- Industrial-process control valves - Part 8-3: noise considerations - Control valves aerodynamic noise prediction method. 工业过程控制阀。第8部分:噪声问题。第3节:气动控制阀噪声预测法。
- Industrial-process control valves - Part 8-3 : noise considerations - Control valves aerodynamic noise prediction method. 工业过程控制阀.;第8部分:噪声问题
- The advances and current state of the aerodynamic noise in turbomachinery were reviewed in terms of generation mechanism, numerical prediction and control method, respectively. 摘要 分别从机理研究、数值预测和控制方法三方面对叶轮机械气动噪声研究进展和现状进行综述。
- Chaos characteristics of the aerodynamic noise are discussed and the aeroacoustic noise signals on helicopter scissors tail rotor is analyzed by the chaos theory. 研究剪刀式尾桨气动噪声的混沌特性,并应用混沌理论进行了直升机尾桨气动噪声信号分析。
- The change of airflow convective accelerating factor to the effect of fan noise is analyzed &calculated according to the mechanism of aerodynamic noise generated in airflow field. 根据空气流场中空气动力性噪声的产生机理,分析并计算了离心式通风机叶轮中,气流相对加速度系数的变化对风机噪声的影响。
- The application is required to be supported by an engine noise test report and an engine emission test report issued by an approved laboratory. 车主必须取得由认可实验室发出的引擎噪音测试报告及引擎排放测试报告,以支持其申请。
- Based on noise test results of a four-cylinder gasoline engine, this paper establishes the simulation model by using simulation software GT-POWER. 本文针对某四缸汽油发动机噪声测试结果,运用数值仿真软件GT-POWER进行建模仿真计算。
- In this article the bearing ability test of hard gear face point-line meshing gear transmission and the trial of noise test are introduced. 本文介绍了硬齿面点线啮合齿轮传动的承载能力试验和噪声测定试验的情况。
- There are electromagnetic, mechanical and aerodynamic noises chiefly. It is motor bearing noise that has most problems and is most difficult to solve. 电机噪声的主要类型有电磁噪声、机械噪声、空气动力噪声等,其中出现问题最多的、最不好解决的是机械噪声中的电机轴承噪声。
- In the noise test of model propellers, singing is a major disturb which influences noise test and data analysis, and must be eliminated. 摘要模型螺旋桨噪声试验中,唱音是影响噪声测试与数据分析的主要干扰,必须予以消除。
- vehicle exterior aerodynamic noise 车外气动噪声
- A simple test will show if this is real gold. 简单的试验就能证明这是否是真金。
- Then we use FEMLAB to evaluate the restrictions of the decoupled MIMO model and also use white noise testing to justify its adaptation. 最后,使用有限元素模型及引用白色干扰的观念,讨论在上述解耦合过程中的限制性。
- Low noise test instrumentation systems 低噪音测试仪器系统
- Pupils who pass the test will be promoted to the next higher grade. 小学生只要考试及格就会升到高年级。
- FM/AM Noise Test Set for a Pulsed Radar 用于脉冲多普勒雷达的调频/调幅噪声测试设备