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Dynamic Analysis of a Variable Displacement Compressor for Vehicle Air Conditioners Using Finite Element Methods
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English
Abstract
Today, time available for production development is shorter and good quality development is required. Using the finite element method is a mean of meeting this requirement. This method of analysis is very adaptable to many fields and can predict static stress, strength, endurance, resonance, dynamic stress, thermal conductivity, convection, radiation, the optimum design, sound, fluid behavior, and electromagnetics in a short period. Furthermore, finite element methods are becoming more practical because of increased speed by computer vector operations and the main memory expansion of computers.
This paper outlines an analytical model for studying vibration characteristics including amplitude, modal shapes and stress while a variable displacement compressor is operating. Finite element analysis reveals the dynamic behavior of the mounts and body of this compressor. This dynamic behavior analysis is based on the shaft bearing load which is subjected to unsteady forces, calculated beforehand by dynamic behavior simulation. Based on these loads, eigenvalues and frequency responses, transient dynamic analysis is conducted using simultaneous inverse iteration and the Householder/QR methods. (See flow chart.)
Authors
Citation
Hariu, N., Nakayama, K., and Hill, W., "Dynamic Analysis of a Variable Displacement Compressor for Vehicle Air Conditioners Using Finite Element Methods," SAE Technical Paper 910213, 1991, https://doi.org/10.4271/910213.Also In
References
- Simic, P. D. Petronigevic Z. “Experimental Analysis of Automobile Body Vibration Characteristics” SAE Paper No. 861261 1986
- Tojo Kenji Takao K. et al “Dynamic Behavior of Variable Displacement Compressor for Automobile Air Conditioners” SAE Paper No. 900084 1990
- Inoue A. et al “Evaluation of Intensity Variable Displacement Compressor with Thermal Expansion Valve in Motor Vehicle Air Conditioning System” SAE Paper No. 880052 1988
- Meirovitch, Leonard “Method of Analytical Dynamics” 1970 McGraw-Hill
- NISA II User's Manual Engineering Mechanics Research Corp. 1990 Troy, Michigan
- Scraton, R. E. “Further Numerical Method in Basic” 1987 Edward Arnold Ltd.